Celestin Apprentice 4/Apprentice-Release4.iso/Information/Programming/Gestalt Selectors 3.2/Gestalt Selectors List 3.2

Text File | 1995-12-11 | 276.4 KB | 6,853 lines | [TEXT/R*ch]

Gestalt Selectors List 3.2
==========================

Maintained by Rene G.A. Ros ([e-mail])

First published: 12 October 1992, 13:15 CET (GMT+1)
Last version:    1 October 1995, 12:40 CET (GMT+1)
Previous update: 29 November 1995, 19:40 CET (GMT+1)
Last modified  : 11 December 1995, 08:05 CET (GMT+1)

This document lists all selectors for use with the Gestalt Manager known to
the editor. These can include selector codes installed by Apple (system)
software or by software from third parties (your software?).
The information in this list is useful for programmers and other people who
can use the Gestalt Manager with their software (i.e. Apple Guide) perhaps
even using externals (i.e. HyperCard, 4th Dimension etc.).
To use this list, you should be familiar with the Gestalt Manager as
described in Inside Macintosh: Operating System Utilities.

This file can be best viewed with a mono-spaced font like Monaco. Because
it is wrapped as setext you can use several utilities to index and read it.
For the Macintosh you can use Easy View and on a UNIX system sv (setext
viewer) works fine. Both are available by FTP from sumex-aim.stanford.edu
(or its mirrors!), archived respectively as:
     ftp://sumex-aim.stanford.edu/info-mac/text/easy-view-261.hqx
     ftp://sumex-aim.stanford.edu/info-mac/text/easy-view-262-updt.hqx
     ftp://sumex-aim.stanford.edu/info-mac/text/setext-viewer-05-unix.uu

A single question mark indicates an uncertainty regarding the information
in front of the question mark. Three question marks indicate complete
absence of the information.
See the chapters at the end for more information about this list.

Contents
--------
    Gestalt Selectors List
      Contents
      Contributions
      Changes Overview
      Wish List
    Apple System Software (A-E)
    Apple System Software (F-J)
    Apple System Software (K-N)
    Apple System Software (O-S)
    Apple System Software (T-Z)
    Apple Additional Software
    Third Parties Software
    Unknown Codes
      Apple Software
      Third Parties Software
    Gestalt Manager Calls
      Gestalt Manager Routines
      Gestalt Value Routines
      Undocumented Gestalt Manager Routines
    Kilo-liners
      Direct Gestalt Calls
      Direct GestaltValue Calls
      GestaltSelectorZero
      GestaltBitTest
      Call Gestalt Function Direct
    Reports
      Accessing the Gestalt Manager
      AppleShare File & Print Server selector codes
      AppleTalk
      Clock Chipped
      Copland
      Copy protection using Gestalt
      Disabling PowerKey
      Environs & SysEnvirons
      Executor Mac-emulator
      Gestalt Apple Event
      Gestalt Applications
      GestaltValue
      GestaltValue & CodeWarrior Problem
      Glue code
      INITGestalt standard
      Machine Names
      Macintosh Application Environment
      Macintosh Clones
      Modern Memory Manager
      PPC Libraries
      QuickTime
      RAM Doubler
      Relabled Macintosh Models
    General Info
      System Managers
      Gestalt Problems
      History
      Abbreviations
      Sources
    Definitions and Formats
      Use in Language
      Definitions
      Format Selector Entry
      Format Version Numbers
    About this list
      Availability
      Gestalt Submission Form
      Acknowledgements
      Legal Stuff
      Editor's Address

Contributions
-------------
This section lists the people who contributed information which is now
included with this version of the list.

===========================================================================
Contributions to the selector sections
===========================================================================
Person                 Software                Selector(s) added/changed
---------------------------------------------------------------------------
Anonymous 'Fig'        AutoDoubler cp          DDAD, DDAE, DDNF
                       DDExpand appl           ADR2, ADRC
Anonymous              Open Transport ???      otvr
                       System (enablers)       drag, mach (Info TN Gestalt)
                       System Update enbl      sysu
Jeff Baudin            System (enablers)       mach
Jean-Pierre Curcio     Launcher cp             bast
                       QuickDraw 3D            q3v
                       Sound Manager ext       snhw
                       System (enablers)       hdwr, mach, shal
                       System Tune-Up          bugz
                       System Update etc.      bugx
                       WorldScript Power Adapter ext?
                                               scrf
Laurent Humbert        System (enablers)       thds
Fabrizio Oddone        QuickDraw 3D            q3vc, q3v
Marco Piovanelli       Finder Enabler          fndx
Jon Pugh               General cp              gpad
Eric-Paul Rebel        System (enablers)       mach
Thomas Reed            PixelPlay               SAVC, SAVR
Rene Ros               7.0/7.1 Apple Guide Enabler ext
                                               ag_e
                       7.5.2 Printing Fix      bugx
                       AppleShare ext          afps
                       CommuniGate Notifier ext
                                               cGnF
                       CopyDoubler cp          DDCD
                       CyberFinder cp          URL!, URLf
                       Eagle ext               EgGP
                       IdleTime INIT           idle
                       IRTalk ext              irhk, puir
                       Macintosh Drag and Drop ext
                                               drag
                       MIDI Manager ext        bugx
                       PageUp/Down ext         jGnE
                       PowerPort cp?           gVDI
                       RAMGauge cp             FCDV
                       SerialDMA ext           shal
                       Speed Access ext        MV20
                       Super Saver cp          MFK7
                       System (enablers)       mach, micn, nreg, rsrc, snd
                       System?                 cmic, fstn, puir
                       TeamNotify ext          NTFY
                       unknown                 MV20, XAsm
Maurice Volaski        System (enablers)       mach
Terence Worley         Microsoft Office Manager cp
                                               MOMM
---------------------------------------------------------------------------

===========================================================================
Contributions to the non-selector sections
===========================================================================
Person                 Chapter/Section
---------------------------------------------------------------------------
Jeff Baudin            Reports/Clock Chipped
Jean-Pierre Curcio     Reports/Macintosh Clones
Kenneth Knotts         Reports/Macintosh Clones
Eric-Paul Rebel        Reports/Machine Names
Rene Ros               Reports/Gestalt Applications
                       Reports/Relabled Macintosh Models
Maurice Volaski        Reports/Relabled Macintosh Models
---------------------------------------------------------------------------

Some previously distributed versions listed the Compuserve email address of
the editor incorrect. The correct address is [e-mail]

All definitions in entries are now in C.

Includes new info from the September 1995 revision of the Gestalt and
SysEnvirons Technical Note (draft).

Eric-Paul Rebel 'read' the PowerBook 5300/190 Enabler for us and found two
different machine type values for the PowerBook 5300!

Changes Overview
----------------
Added selectors
    Apple System  : -
    Apple Add.    : q3v
    Third Parties : idle
Added unknown
    Apple Softw.  : cmic, fstn, otvr
    Third Parties : cGnF, EgGP, FCDV, gVDI, MFK7, MV20, NTFY, URL!,
                    XAsm
Changed selectors
    Apple System  : afps, drag, hdwr, mach, micn, nreg, rsrc, shal,
                    snd , snhw, thds
    Apple Add.    : q3vc
    Third Parties : SAVC, SAVR
Changed unknown
    Apple Softw.  : bast, bugx, bugy, bugz, fndx, gpad, irhk, puir,
                    scrf, shal
    Third Parties : ADR2, ADRC, DDAD, DDAE, DDCD, DDNF, jGnE, URLf
Previously unknown
    Apple System  : -
    Apple Add.    : -
    Third Parties : MOMM
Includes updates 3.1.1 up to and including 3.1.6, sent to subscribers of
the mailing list.

Wish list
---------
The table below lists the topics on which more information is needed
regarding the Gestalt selectors which provide information about these
topics.

===========================================================================
WANTED
===========================================================================
Information wanted about:
---------------------------------------------------------------------------
PowerPCx Platform  formerly CHRP
DR Emulator        short for dynamic recompiling emulator, on new Power
                   Macs, nothing?)
FireWire
Gestalt Manager    its future
multi-processing   'kbd ' already obsolete, 'proc' also? :-)
PCI                selector like 'slot' for NuBus? Anything?
Pippin
QuickTime VR       nothing? now as library, later as extension?
RAID               compatible drivers installed?
SD-ROM             Super CD-ROM (10x capacity CD-ROM) driver software?
Sound Manager 3.1  PPC native bit in gestaltSoundAttr response? none?

machine IDs        for the latest or upcoming Macs

and more info for the General Info/System Managers section
---------------------------------------------------------------------------

Apple System Software (A-E)
===========================
This chapter lists selector codes of which the meaning is known and the
first character of the selector code is in the A-E range.

a/ux (A/UX [2.0?])
     (System [6.0.4])
     gestaltAUXVersion
     Returns the version of A/UX, if it is executing, as BCD?

     #define gestaltAUXVersion 'a/ux' /* A/UX version, if present */

     NOTES:
     If Gestalt doesn't know the answer, test bit 9 of the HWCFgFlag
     system global (0x0B22; word). If set, assume you have A/UX 1.0.

     This selector also indicates if you're running under MAE on an
     UNIX machine. &AD08

     This selector may be installed but returns gestaltUnknownErr instead
     of zero when A/UX is not installed. (Rene Ros)

addr (System [6.0.4])
     gestaltAddressingModeAttr
     Returns information about the current addressing mode.

     enum {
     #define gestaltAddressingModeAttr 'addr' /* addressing mode attr. */
     gestalt32BitAddressing = 0,  /* started up with 32-bit addr. */
     gestalt32BitSysZone    = 1,  /* system heap has 32-bit clean */
                                  /*  block headers */
     gestalt32BitCapable    = 2}; /* machine is 32-bit capable */

afps (AppleShare ext [3.5?], part of System 7.5) &AD18
     gestaltAppleShareClient?
     Returns the version of the AppleShare client software as Integer in
     the high-word of the response? The low-word of the response returns
     information on the AppleShare client software? (Rene Ros)

     enum {
     #define gestaltAppleShareClient? 'afps'
     gestaltAppleShareVersionMask? = 0xFFFF0000, /* Version is in upper */
                                                 /*  2 bytes of result */
     gestaltAppleShare???Mask?     = 0x0001};    /* If set ??? */
     gestaltAppleShare???Mask?     = 0x0002};    /* If set ??? */

     NOTE:
     No details were given in the source: "...information about the
     characteristics of the workstation and the current version..."
     Seen bits 0 and 16 set. (Rene Ros)

ag_v (Apple Guide ext [1.2.7])
     gestaltAppleGuideVersion?
     Returns the version number of Apple Guide as BCD.

     #define gestaltAppleGuideVersion? 'ag_v'

alis (System [7.0])
     (Remote Access Aliases ext [1.0?], part of Apple Remote Access)
     gestaltAliasMgrAttr
     Returns information about the Alias Manager.

     enum {
     #define gestaltAliasMgrAttr 'alis' /* Alias Mgr attributes */
     gestaltAliasMgrPresent                 = 0,
     gestaltAliasMgrSupportsRemoteAppletalk = 1,  /* supports Remote */
                                                  /*  Appletalk &AD02 */
     gestaltAliasMgr???                     = 2}; /* since System 7.1 Pro*/

     NOTE: See 'Reports' chapter (QuickTime section) for more information.

ascr (AppleScript ext [1.0])
     gestaltAppleScriptAttr &AS08
     Returns information about AppleScript.

     enum {
     #define gestaltAppleScriptAttr 'ascr' /* AppleScript attributes */
     gestaltAppleScriptPresent        = 0,
     gestaltAppleScriptPowerPCSupport = 1};

ascv (AppleScript ext [1.0])
     gestaltAppleScriptVersion &AS08
     Returns the version of AppleScript as NumVersion.

     #define gestaltAppleScriptVersion 'ascv' /* AppleScript version */

     NOTE:
     AppleScript 1.1 returns 0x01100110 which doesn't look like a proper
     version number (version 1.0 returned 0x01008000). (Rene Ros)

aslm (Shared Library Manager ext [1.1.1?])
     (System? [7.5?])
     gestaltASLM68K &AS17
     Returns the version of the Shared Library Manager as BCD in the upper
     2 bytes and attribute bits in the lower 2 bits. NULL is returned when
     ASLM did not load properly at boot time and is not available.

     enum {
     #define gestaltASLM68K 'aslm' /* ASLM selector for 68K Macs */
     #define gestaltASLMPPC 'slmp' /* ASLM selector for PPC Macs */
     #define gestaltASLM 'aslm'    /* or 'slmp', see below */
     gestaltASLMVersionMask = 0xFFFF0000, /* Version is in upper 2 bytes */
                                          /*  of result */
     gestaltASLMPresentMask = 0x0001,     /* If set ASLM is or was */
                                          /*  loaded. */
     gestaltASLMLoadedMask  = 0x0002};    /* If set ASLM is currently */
                                          /*  loaded. */

     #if GENERATINGPOWERPC
         define gestaltASLM gestaltASLMPPC
     #else
         define gestaltASLM gestaltASLM68K
     #endif

     NOTES:
     Earlier (beta?) versions of the ASLM PowerPC used 'ASLM' as the
     selector instead of 'slmp'.

     Early releases of Shared Library Manager installed an INIT into the
     system file which registered this selector with an invalid function
     pointer in the case that the Shared Library Manager extension did not
     exist. Calling Gestalt with this selector would then cause a bus error.
     (Paul Cunningham, Teknosys, Inc.)

     Shared Library Manager 2.0 (beta) on a Power Macintosh 6100/60
     installs both 'aslm' and 'slmp' selectors. (Rene Ros)

ASLM (Shared Library Manager ext [1.1.1?])
     (System? [7.5?])
     gestaltASLMPPC (old!) &AS17

     NOTE:
     See the gestaltASLM68K ('aslm') entry for more information.

atkv (System [7.0, AppleTalk 56])
     gestaltATalkVersion &AT02
     Returns AppleTalk version as NumVersion. If selector is not present
     then AppleTalk is not present (not loaded at startup). &AD18

     This is different from 'atlk' !

     #define gestaltATalkVersion 'atkv' /* AppleTalk version &AD01/M01 */

     WARNING:
     This selector returns the majorRev field of the NumVersion record as
     hexadecimal instead of the usual BCD.

     NOTE: See 'Reports' chapter (AppleTalk section) for more information.

atlk (System [6.0.4])
     gestaltAppleTalkVersion
     Returns the version of the .MPP driver as INTEGER. And returns zero
     when AppleTalk is off. &AD18

     #define gestaltAppleTalkVersion 'atlk' /* AppleTalk version */

aucd (Audio CD Access ext [4.0], part of Apple CD-ROM Software) &AT03
     gestaltAudioCDAccessVersion?
     Returns Audio CD Access version as BCD.

     #define gestaltAudioCDAccessVersion? 'aucd' /* Audio CD Access */
                                                 /*  version */

     NOTE: The returned version is obtained from 'vers' resource ID# 1.

BSDa (CloseView cp [???], by Berkeley Systems, Inc.)
     gestaltCloseViewAttr
     Returns information about the CloseView Control Panel.

     enum {
     #define gestaltCloseViewAttr 'BSDa'      /* CloseView attributes */
     gestaltCloseViewEnabled            = 0,
     gestaltCloseViewDisplayMgrFriendly = 1}; /* Closeview compatible */
                                              /*  with Display Manager */
                                              /*  (System 7.5.2?) &AS05 */

cash (System [???]) &S03
     gestaltRAMCacheSize
     Returns byte-size of physical RAM allocated to Disk Cache.
     0 = Disk Cache Off

     #define gestaltRAMCacheSize 'cash' /* RAM cache size */

     NOTE:
     This selector is listed in THINK Reference 1.0 but it is unknown which
     System Software version should install it.

cfrg (System [7.1.2? on PowerMac])
     (CFM68K ext [1.0a1], part of OpenDoc)
     gestaltCFMAttr
     Returns information about the Code Fragment Manager.

     enum {
     #define gestaltCFMAttr 'cfrg' /* Code Fragment Mgr attributes */
     gestaltCFMPresent = 0}; /* Code Fragment Manager is present */

cmta (ColorSync ext [1.0.4?]
     gestaltColorMatchingAttr &AD09
     Returns information about the ColorSync Utilities?

     enum {
     #define gestaltColorMatchingAttr 'cmta' /* Color Matching Attr. */
     gestaltHighLevelMatching      = 0,  /* BeginMatching & */
                                         /*  DrawMatchedPicture present */
     gestaltColorMatchingLibLoaded = 1}; /* Native PowerPC shared */
                                         /*  library is loaded. a.k.a. */
                                         /*  gestaltSharedLibLoaded? */

cmtc (ColorSync ext [1.0?])
     gestaltColorMatchingVersion
     Returns the version of the Color Matching software as BCD.

     enum {
     #define gestaltColorMatchingVersion 'cmtc' /* Color Matching */
                                                /* version */
     gestaltColorSync10  = 0x0100,  /* &AD09 */
     gestaltColorSync11  = 0x0110,  /* &AD09 */
     gestaltColorSync104 = 0x0104,  /* &AD09 */
     gestaltColorSync105 = 0x0105,  /* &AD09 */
     gestaltColorSync20  = 0x0200}; /* &AD17/AD21 */

     NOTE:
     ColorSync 1.0 returns gestaltColorSync10 for the version of the
     utilities that work with System 6.0.7. And gestaltColorSync11 is
     returned by the version that works with System 7.0 and later.
     From version 1.0.4 up the correct version is returned. &AD17

conn (System [7.0])
     gestaltConnMgrAttr
     Returns information about the Connection Manager.

     enum {
     #define gestaltConnMgrAttr 'conn' /* Conn. Mgr attributes */
     gestaltConnMgrPresent      = 0,  /* Connection Mgr is present */
     gestaltConnMgrCMSearchFix  = 1,  /* fix for CMAddSearch present */
     gestaltConnMgrErrorString  = 2,  /* has CMGetErrorString &AS02 */
     gestaltConnMgrMultiAsyncIO = 3}; /* CMNewsIOPB,CMDisposeIOPB, */
                                      /*  CMPBRead,CMPBWrite,CMPBIOKill */
                                      /*  &AS02 */

     NOTE:
     Not installed by Communications Toolbox for System 6.

cpkr (Color Picker ext [2.0?])
     gestaltColorPicker
     gestaltColorPickerVersion
     Returns Color Picker version as BCD.

     /* ColorPicker Mgr version */
     #define gestaltColorPicker 'cpkr'
     #define gestaltColorPickerVersion 'cpkr'

     NOTE:
     Version 2.0a4 returns as response 0x0001, but version 2.0a5 and
     later (including 2.0f) return 0x0100. (Rene Ros)

cpnt (System [7.1])
     (Color Picker Extension ext [2.0])
     (Color Sync ext [1.0.4?])
     (Macintosh Easy Open cp [1.0?])
     (QuickTime ext [1.0])
     (Speech Manager ext [1.1.1, not 1.2?])
     gestaltComponentMgr
     Returns Component Manager version as INTEGER.

     #define gestaltComponentMgr 'cpnt' /* Component Mgr version &AS01 */

cput (System [7.1.2?]) &AS04/AS05
     gestaltNativeCPUtype
     Returns a value that indicates the type of native processor that is
     currently running.

     enum {
     #define gestaltNativeCPUtype 'cput' /* Native CPU type */
     /* Motorola Architecture */
     gestaltCPU68000 = 1,
     gestaltCPU68010 = 2,
     gestaltCPU68020 = 3,
     gestaltCPU68030 = 4,
     gestaltCPU68040 = 5,
     /* PowerPC Architecture */
     gestaltCPU601   = 0x101,
     gestaltCPU603   = 0x103,
     gestaltCPU604   = 0x104,  /* same for 604e ? */
     gestaltCPU603e? = 0x106,  /* for 603e ? seen on PowerBook 5300 */

     /* PowerPC Architecture (Unreleased & Rumoured) */
     gestaltCPU603ev?= ???,
     gestaltCPU604e? = ???,
     gestaltCPU613?  = ???,
     gestaltCPU614?  = ???,
     gestaltCPU615?  = ???,
     gestaltCPU620?  = ???,
     gestaltCPU630?  = ???};

     NOTE:
     To check whether the native system architecture is a MC680x0 or a
     PowerPC use the gestaltSysArchitecture ('sysa') selector. See for
     more information on the 68K processors the gestaltProcessorType
     ('proc') selector.

     The GestaltEqu.h file published with E.T.O. #12 was replaced by the
     one on E.T.O. #13. However there was made a mistake, it lists the 68K
     values in the range 0-4 while it should be 1-5 as listed above.
     This problem is acknowledged by Apple.
     You can fix this problem by using the declarations listed above or by
     using the GestaltEqu.h file from E.T.O. #13 but then test first the
     gestaltSysArchitecture ('sysa') selector and when it reports a 68K
     machine use gestaltProcessorType.
     However, System 7.5 and later were apperantly created using the
     incorrect header file and return the incorrect values.
     Example: 'cput' returns 3 and 'proc' returns 4.
     (Anonymous, Dave Radcliffe, Roland Mansson, Rene Ros)

crm  (System [7.0])
     gestaltCRMAttr
     Returns information about the Communications Resource Manager.

     enum {
     #define gestaltCRMAttr 'crm ' /* Comm. Resource Mgr attributes */
     gestaltCRMPresent       = 0,  /* Comm. Resource Mgr present */
     gestaltCRMPersistentFix = 1,  /* fix for persistent tools &AS02 */
     gestaltCRMToolRsrcCalls = 2}; /* has CRMGetToolResource/ */
                                   /*  ReleaseToolResource &AS02 */

     NOTE:
     Not installed by Communications Toolbox for System 6.

csvr (Control Strip cp [1.0])
     gestaltControlStripVersion
     Returns the version of Control Strip software that is installed as
     NumVersion.

     #define gestaltControlStripVersion 'csvr'

     WARNING:
     Control Strip 1.0 used to install the 'sdvr' selector (which is used
     by PowerTalk) instead of this selector to return the version. This is
     corrected when the gestaltControlStripAttr ('sdev') selector has bit
     gestaltControlStripVersionFixed set (Control Strip 1.1 and later).
     &AS11/AT08 (Rene Ros)

ctbm (System [???])
     gestaltCTBManagersAttr &S02
     Returns information about the Communications Toolbox Managers, it is a
     bitmask of which managers are present.

     #define gestaltCTBManagersAttr 'ctbm' /* Comm. Mgrs attributes */

     NOTE:
     Never installed by any known system version. Never planned for any
     previous or future system version. (Alex Rosenberg)

ctbu (System [7.0])
     gestaltCTBUtilsAttr &S02
     Returns information about the Communications Toolbox Utilities.

     enum {
     #define gestaltCTBUtilsAttr 'ctbu' /* Comm. TB Utils attr. */
     gestaltCTBUtilsPresent = 0};

     NOTE:
     Not installed by Communications Toolbox for System 6.

ctbv (System [7.0])
     gestaltCTBVersion
     Returns the version number of the Communications Toolbox.

     #define gestaltCTBVersion 'ctbv' /* Comm. Toolbox version */

     NOTE:
     Not installed by Communications Toolbox for System 6.

     With the Power Macintosh the Communication Toolbox returned a Gestalt
     value indicating version 1.1 while the ROM actually had version 1.0.
     This is fixed by the PowerPC Enabler 1.0.1. and the PowerPC Upgrade
     Card Enabler 1.0.1. because they install CTB 1.1. &AT06
     As of System 7.1, the version of the CTB should track the System
     version. The PowerMac ROMs handled this incorrectly and System 7.5
     rectifies this by reporting 7.5.0. (Alex Rosenberg)

danm (System [Copland?])
     gestaltDesktopAnimationMgr &AD21
     Returns information about the Desktop Animation Manager (DAM).

     enum {
     #define gestaltDesktopAnimationMgr 'danm'
     gestaltDesktopAnimationMgrPresent = 0}; /* if set, DAM is present */

     WARNING:
     From the Preliminary Copland Headers. May change in the future.

dbac (System [7.0])
     gestaltDBAccessMgrAttr
     Returns information about the Data Access Manager.

     enum {
     #define gestaltDBAccessMgrAttr 'dbac' /* Data Access Mgr attributes */
     gestaltDBAccessMgrPresent = 0}; /* TRUE if Data Access Mgr present */

dfnd (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltSDPFindVersion
     Returns the SDP Find version as INTEGER. Returns zero if not present
     and available.

     #define gestaltSDPFindVersion 'dfnd' /* SDP Find version */

dict (System [7.1])
     gestaltDictionaryMgrAttr
     Returns information about the Dictionary Manager.

     enum {
     #define gestaltDictionaryMgrAttr 'dict' /* Dictionary Mgr attributes */
     gestaltDictionaryMgrPresent = 0};

ditl (System [7.0])
     gestaltDITLExtAttr
     Returns information about the Dialog Manager.

     enum {
     gestaltDITLExtAttr 'ditl' /* Dialog Mgr attributes */
     gestaltDITLExtPresent = 0}; /* Dialog Mgr extensions present */

dplv (Display Enabler [1.0?])
     (System [7.1.1])
     gestaltDisplayMgrVers &AS05
     Returns Display Manager version as INTEGER?.

     #define gestaltDisplayMgrVers 'dplv' /* Display Mgr version */

dply (Display Enabler [1.0?])
     (System [7.1.1])
     gestaltDisplayMgrAttr &AS05
     Returns information about the Display Manager.

     enum {
     #define gestaltDisplayMgrAttr 'dply'     /* Display Mgr attr. */
     gestaltDisplayMgrPresent           = 0,  /* True if Display Mgr is */
                                              /*  present */
     gestalt???                         = 1,  /* seen with System 7.5.2 */
     gestaltDisplayMgrCanSwitchMirrored = 2,  /* True if Display Mgr can */
                                              /*  switch modes on mirrored*/
                                              /*  displays &AD21 */
     gestaltDisplayMgrSetDepthNotifies  = 3}; /* True, SetDepth generates*/
                                              /*  Display  Mgr */
                                              /*  notification &AD21 */

drag (Macintosh Drag and Drop ext [1.0])
     (System? [7.5?])
     gestaltDragMgrAttr &AD05
     Returns information about the Drag Manager.

     enum {
     #define gestaltDragMgrAttr 'drag' /* Drag Manager attributes */
     gestaltDragMgrPresent      =  0,  /* Drag Manager is present */
     gestaltDragMgrFloatingWind =  1,  /* &AS09 */
     gestaltPPCDragLibPresent   =  2,  /* &AS09 */
     gestaltTranslucentDrags?   =  3,  /* SetDragImage function present */
                                       /*  to drag semi-transparant */
                                       /*  images instead of outlines? */
                                       /*  (Anonymous) */
     gestaltDragMgr???          = 31}; /* set with System 7.5 */

dsig (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltDigitalSignatureVersion
     Returns version of the Digital Signature toolbox as BCD.

     #define gestaltDigitalSignatureVersion 'dsig' /* Digitial Signature */
                                                   /*  version */

eajt (Easy Access cp [7.0])
     gestaltEasyAccessJTable
     Returns the base address of the Easy Access jump-trap table.

     #define gestaltEasyAccessJTable 'eajt' /* Easy Access jump-trap */
                                            /*  table &M01 */

easy (Easy Access cp [6.0.4?])
     gestaltEasyAccessAttr
     Returns information about the status of Easy Access.

     enum {
     gestaltEasyAccessAttr 'easy'  /* Easy Access attributes */
     gestaltEasyAccessOff    = 0,  /* Easy Access present but off */
     gestaltEasyAccessOn     = 1,  /* Easy Access on */
     gestaltEasyAccessSticky = 2,  /* Easy Access "Sticky" */
     gestaltEasyAccessLocked = 3}; /* Easy Access "Locked" */

     NOTE:
     The values listed above are not returned with System 7 and later.
     Because of a bug different values are returned. This problem is
     acknowledged by Apple, but it is unclear when it will be fixed. They
     know about it since September 1992... (Rene Ros)

edtn (System [7.0])
     (Macintosh Easy Open cp [1.0?])
     gestaltEditionMgrAttr
     Returns information about the Edition Manager.

     enum{
     #define gestaltEditionMgrAttr 'edtn' /* Edition Mgr attributes */
     gestaltEditionMgrPresent          = 0,
     gestaltEditionMgrTranslationAware = 1}; /* &AD03 */

evnt (System [7.0]) &AS05
     (Apple Event Manager ext [1.0.1], part of AppleScript Setup)
     gestaltAppleEventsAttr
     Returns information about Apple Events.

     enum {
     #define gestaltAppleEventsAttr 'evnt' /* Apple events attributes */
     gestaltAppleEventsPresent = 0,  /* True if Apple Events present */
                                     /*  &AS05 */
     gestaltScriptingSupport   = 1,
     gestaltOSLInSystem        = 2}; /* OSL is in system so don`t use */
                                     /*  the one linked */

     NOTE:
     These declarations in the AEObjects.h file (on ETO 14) should be
     ignored:
     gestaltObjectSupportLibraryInSystem = 1
     gestaltObjectSupportLibraryPowerPCSupport = 2

Apple System Software (F-J)
===========================
This chapter lists selector codes of which the meaning is known and the
first character of the selector code is in the F-J range.

flag (Network Extension ext [System 7.0 &AT02])
     gestaltFlagshipAttr
     Returns information about the Flagship Naming Services.

     enum {
     #define gestaltFlagshipAttr 'flag' /* &M01 */
     gestaltFlagshipPresent    = 0,  /* &M01 */
     gestaltFlagshipRegistered = 1}; /* &M01 */

fnd  (AppleShare? ext [3.6?]) &AD18
     gestaltFinderVolumeGrade?
     Returns a volume grade value. If the volume grade of a (remote) volume
     the Finder (version 7.5.1 and later) is copying to is less than the
     returned value, a buffer is used for which the size is returned by the
     'fnd^' (666E 64A4) selector.

     #define gestaltFinderVolumeGrade? 'fnd '

     NOTE:
     See also the 'fnd^' (666E 64A4) selector entry.

     AppleShare 3.6 (part of System 7.5 Update 2.0) seems to install two
     other selectors instead. The 'fnd ' selector seems to be replaced by
     (OSType) 0x666E 64A0 (last byte: option-t). (Anonymous)

fnd^ (AppleShare? ext [3.6?]) &AD18
     gestaltFinderBufferSize? (666E 64A4)
     Returns the size of the buffer used to copy files to a (remote) volume
     with a volume grade value less then the value returned by the 'fnd '
     selector.

     #define gestaltFinderBufferSize? 'fnd^'

     NOTES:
     The ^ is actually the option-6 character (0xA4).

     See also the 'fnd ' selector entry.

     AppleShare 3.6 (part of System 7.5 Update 2.0) seems to install two
     other selectors instead. The 'fnd ' selector seems to be replaced by
     (OSType) 0x666E 64A7 (last byte: option-s). (Anonymous)

fndr (Finder [7.1.1]) &AS04
     (Finder Scripting Extension ext [1.2?])
     (Finder Clipping Extension ext [7.1.4?])
     gestaltFinderAttr
     Returns information about the Finder.

     enum {
     #define gestaltFinderAttr 'fndr'
     gestaltFinderDropEvent          = 0,
     gestaltFinderMagicPlacement     = 1,
     gestaltFinderCallsAEProcess     = 2,
     gestaltOSLCompliantFinder       = 3,  /* supports Finder Event Suite */
     gestaltFinderSupports4GBVolumes = 4,  /* implemented by System 7.5.1 */
                                           /*  but bit not set? */
     gestaltFinderHandlesCFMFailures = 5,
     gestaltFinderHasClippings       = 6}; /* &AD12 */

fold (System [7.0])
     gestaltFindFolderAttr
     Returns information about the FindFolder function.

     enum {
     gestaltFindFolderAttr 'fold'   /* FindFolder attributes */
     gestaltFindFolderPresent = 0}; /* FindFolder function available */

font (System [7.0])
     (TrueType INIT ext for System 6)
     gestaltFontMgrAttr
     Returns information about the Font Manager.

     enum {
     #define gestaltFontMgrAttr 'font' /* Font Mgr attributes */
     gestaltOutlineFonts     = 0,  /* TrueType present */
     gestaltFontMgr???       = 1,  /* set with System 7.1 & 7.5 */
     gestaltDiskCachedFonts? = 2}; /* Disk Cached Fonts available? */

     NOTE:
     Inside the Inline Extension 1.0 with KanjiTalk7, which was compiled
     with full subroutine names, there is a subroutine called
     'DiskChachedFontsAvailable' in an INIT resource which checks bit 2
     of the gestaltFontMgrAttr selector response. (Marco Piovanelli)

fpu  (System [6.0.4])
     gestaltFPUType
     Returns a value that indicates the FPU-type, if any.

     enum {
     gestaltFPUType 'fpu ' /* FPU Type */
     gestaltNoFPU    = 0,  /* no FPU */
     gestalt68881    = 1,  /* 68881 FPU */
     gestalt68882    = 2,  /* 68882 FPU */
     gestalt68040FPU = 3}; /* built-in 68040 FPU &S01 */

     NOTE: See also the 'FPUE' entry in the Third Parties chapter.

fs   (720K Floppy Disk Formatter ext [1.0a3?],
      part of the Hardware System Update [2.0])
     (Apple Share ext [AS 3.0/SYS 7.0])
     (File System Manager ext [1.2])
     (System [7.0])
     gestaltFSAttr
     Returns information about the file system.

     enum {
     #define gestaltFSAttr 'fs  ' /* file-system attributes */
     gestaltFullExtFSDispatching = 0,  /* exports HFSDispatch traps */
     gestaltHasFSSpecCalls       = 1,  /* supports FSSpec records */
     gestaltHasFileSystemManager = 2,  /* has the File System Manager */
                                       /*  &S01 */
     gestaltFSMDoesDynamicLoad   = 3,  /* FSM supports dynamic loads */
                                       /*  &AD12 */
     gestaltFSSupports4GBVols    = 4,  /* FS supports 4 gigabyte volumes */
                                       /*  &AD14 */
     gestaltFSSupports2TBVols    = 5,  /* FS supports 2 terabyte volumes */
                                       /*  and PBXGetVInfo available */
                                       /*  &AD14 */
     gestaltHasExtendedDiskInit  = 6}; /* has extended Disk */
                                       /*  Initialization calls &AD12 */

     NOTES:
     See also the gestaltFSMVersion ('fsm ') selector.

     See 'Reports' chapter (QuickTime section) for more information.

fsm  (File System Manager ext [1.2])
     gestaltFSMVersion &AD14
     Returns File System Manager version as BCD.

     #define gestaltFSMVersion 'fsm '

     NOTE:
     See also the gestaltFSAttr ('fs  ') selector.

     While both FSM 1.2 and System 7.5 install/patch three traps
     (_FileSysMgr, _HFSUtils and _Pack2 (Extended Disk Initialization
     Package)) it happens that System 7.5 does not install the
     gestaltFSMVersion ('fsm ') selector. It does set the FSM related bits
     of the gestaltFSAttr ('fs  ') selector. (Fabrizio Oddone)
     This selector is correctly installed by System 7.5.1. (Rene Ros)

fxfr (System [7.0])
     gestaltFXfrMgrAttr
     Returns information about the File Transfer Manager.

     enum {
     #define gestaltFXfrMgrAttr 'fxfr' /* File Transfer Mgr attributes */
     gestaltFXfrMgrPresent     = 0,   /* File Transfer Mgr present */
     gestaltFXfrMgrMultiFile   = 1,   /* supports FTSend and FTReceive */
                                      /*  &AS02 */
     gestaltFXfrMgrErrorString = 2,   /* supports FTGetErrorString */
                                      /*  &AS02/S02 */
     gestaltFXfrMgr???         = 3?}; /* new, see future technote */
                                      /*  set with System 7.5 */

gval (GestaltValue glue code)
     gestaltValueTable?
     Returns a pointer to a table with the selectors and values managed
     by the GestaltValue code. (Marco Piovanelli)

     #define gestaltValueTable? 'gval'

     WARNING:
     Although this information isn't officially confirmed, it is probably
     correct.

     NOTES:
     Although System 7.5 implements the GestaltValue functions it does not
     install this selector because the GestaltValue table is combined with
     the normal Gestalt table (See the 'tabl' entry). Only with system
     software before 7.5 this selector is installed by the glue code.
     (Rene Ros)

     See 'Reports' chapter (GestaltValue section) for more information.

hdwr (System [6.0.4]) INF
     gestaltHardwareAttr
     Returns information about the hardware configuration of the machine.

     enum {
     #define gestaltHardwareAttr 'hdwr' /* hardware attributes */
     gestaltHasVIA1         =  0,  /* VIA 1 */
     gestaltHasVIA2         =  1,  /* VIA 2 */
     gestaltHasRBV          =  2,  /* RBV &M01 */
     gestaltHasASC          =  3,  /* ASC (or compatible with) */
     gestaltHasSCC          =  4,  /* SCC &M01 */
     gestaltHasOSS          =  5,  /* OSS &M01 */
     gestaltHasSCSIDMA      =  6,  /* 53C80 SCSI DMA &M01 */
     gestaltHasSCSI         =  7,  /* 53C80 SCSI */
     gestaltHasSWIMIOP      =  8,  /* SWIM IOP &M01 */
     gestaltHasSCCIOP       =  9,  /* SCC IOP &M01 */
     gestaltHasFitch        = 10,  /* Fitch memory Controller &M02 */
     gestaltHasIWM          = 11,  /* IWM &M01 */
     gestaltHasPWM          = 12,  /* PWM disk speed buffer &M02 */
     gestaltHasRAMSndBuff   = 13,  /* RAM-based sound buffer &M02 */
     gestaltHasVideoDAConv  = 14,  /* Video D/A Converter &M02 */
     gestaltHasPGC          = 15,  /* PGC (parity control) &M02 */
     gestaltHasRPU?         = 16,  /* Random Parity Unit */
     gestaltHasOMC?         = 17,  /* Orwell Memory Controller */
     gestaltHasVISARBV?     = 18,  /* VISA Ram Based Video */
     gestaltHasSoftPowerOff = 19,  /* Software PowerOff */
                                   /*  (since System 7.0?) &S01 */
     gestaltHasSonic        = 20,  /* Sonic (built-in ethernet) &M01 */
     gestaltHasSCSI961      = 21,  /* Int. 53C96 SCSI &AT01 */
     gestaltHasSCSI962      = 22,  /* Ext. 53C96 SCSI &AT01 */
     gestaltHasDAFBVideo    = 23,  /* DAFB Video &M01 */
     gestaltHasUniversalROM = 24,  /* Universal ROM &AT04 */
     gestaltHasJMC          = 25,  /* Jaws Memory Controller? */
     gestaltNeedsRESET      = 27,  /* ??? set on PowerMac, C660AV and */
                                   /*  under MAE 1.0 */
     gestaltHasEnhancedLtalk= 30}; /* Enhanced LocalTalk &AD21 */

     NOTES:
     See for additional information the TN "M.OV.GestaltSysenvirons" (OV 16).

     On the Mac IIfx and Quadra 900 the gestaltHasSCC bit always returns 0
     because the SCC is isolated by I/O processors. When the Compatibility
     Switch control panel is used the bit is set. &AD12

     The old IM VI listed this selector as an environmental selector but
     IM OS Utilities now lists it as an informational selector.

help (System [7.0])
     gestaltHelpMgrAttr
     Returns information about the Help Manager.

     enum {
     #define gestaltHelpMgrAttr 'help' /* Help Mgr attributes */
     gestaltHelpMgrPresent    =  0,  /* Help Mgr present */
     gestaltHelpMgrExtensions =  1,  /* Help Mgr extensions installed */
                                     /*  &AS03 */
     gestaltAppleGuideIsDebug = 30,  /* Apple Guide is debugging version */
                                     /*  &AS12 */
     gestaltAppleGuidePresent = 31}; /* Apple Guide is available &AS12 */

hscd (High Sierra File Access ext [5.0], part of Apple CD-ROM Software)
     (ISO 9660 File Access ext [1.0-4.0], part of Apple CD-ROM Software)
     gestaltHighSierraVersion? &AT03
     Returns High Sierra File Access version in BCD.

     #define gestaltHighSierraVersion? 'hscd' /* High Sierra Fileaccess */
                                              /*  version */

     NOTE: The returned version is obtained from 'vers' resource ID# 1.

icmp (QuickTime ext [1.0])
     gestaltCompressionMgr
     Returns Compression Manager version as Integer.

     #define gestaltCompressionMgr 'icmp' /* determines if Image */
                                          /*  Compression manager is */
                                          /*  available &AS01 */

icon (System 7.5 Update ext [1.0])
     gestaltIconUtilities
     Returns information about the Icon Utilities routines.

     enum {
     #define gestaltIconUtilities 'icon' /* Icon Utils attributes */
     gestaltIconUtilitiesPresent = 0};

     NOTE:
     This selector is supposed to be implemented since System 7.1.2. You
     need to determine if the _IconDispatch A-trap (0xAB49) is available
     instead since the Icon Utilities are actually available since
     System 7.0. &AD13/AT01
     System 7.5.1 finally implements this selector. (Anonymous)

iic  (System? [7.5?])
     gestaltIICAttr &AS19
     Returns information about the Inter-Integrated Circuit Bus (IIC).

     enum {
     #define gestaltIICAttr 'iic ' /* Inter-Integrated Circuit Bus */
     gestaltStdIIC         = 0,    /* standard IIC */
     gestaltCombinedIIC    = 1,    /* combined format IIC */
     gestaltExtendedIIC    = 2,    /* extended IIC */
     gestaltMultiIIC       = 3,    /* multiple bus master IIC */
     gestaltGeneralCallIIC = 4,    /* general call IIC */
     gestaltFastIIC        = 5};   /* fast IIC */

intd (Powerbook Duo Enabler [1.0])
     (System [7.5])
     (System Enabler 111 [1.0])
     (System Enabler 121 [1.0])
     (System Enabler 131 [1.0])
     (System Enabler 201 [1.0])
     gestaltInternalDiskAttr?
     Returns information about the internal harddisk of portable
     computers?

     enum {
     #define gestaltInternalDiskAttr? 'intd' /* PB Internal HD attr. */
     gestaltHasInternalDisk? =  0,  /* TRUE if machine has internal HD */
     gestaltDiskSpinning?    =  1,  /* TRUE if internal HD is spon up */
     gestalt???              = 24}; /* unknown, set on PB180, PB210, */
                                    /*  PB540 and others? */

     WARNING:
     This information is from a reliable source. However, is it not
     officially confirmed by Apple and there are no constants defined.

     NOTE:
     On a PB Duo 210 (PowerBook Duo Enabler) I haven't seen bit 1 set with
     System 7.1, even when the disk is spinning. It is also reported the
     bit is clear when the disk is spinning and set when down (seen on
     PB Duo 230). (David Lewis, Rene Ros)
     This problem seems to be fixed with System 7.5.1. (Rene Ros)

iscd (ISO 9660 File Access ext [5.0], part of Apple CD-ROM Software)
     gestaltISO9660Version?
     Returns ISO 9660 File Access version in BCD?.

     #define gestaltISO9660Version? 'iscd'

     NOTE:
     Versions before 5.0 installed the 'hscd' selector.

Apple System Software (K-N)
===========================
This chapter lists selector codes of which the meaning is known and the
first character of the selector code is in the K-N range.

kbd  (System [6.0.4])
     gestaltKeyboardType
     Returns a value that indicates the type of keyboard on which the last
     keystroke was seen.

     enum {
     #define gestaltKeyboardType 'kbd ' /* keyboard type */
     gestaltMacKbd            =  1,  /* Macintosh Keyboard */
     gestaltMacAndPad         =  2,  /* Macintosh Keyboard with Pad */
     gestaltMacPlusKbd        =  3,  /* Macintosh Plus Keyboard */
     gestaltExtADBKbd         =  4,  /* Extended ADB Keyboard */
     gestaltStdADBKbd         =  5,  /* Standard ADB Keyboard */
     gestaltPrtblADBKbd       =  6,  /* Portable ADB Keyboard */
     gestaltPrtblISOKbd       =  7,  /* Portable ISO ADB Keyboard */
     gestaltStdISOADBKbd      =  8,  /* Standard ISO ADB Keyboard */
     gestaltExtISOADBKbd      =  9,  /* Extended ISO ADB Keyboard */
     gestaltADBKbdII          = 10,  /* ADB Keyboard II */
     gestaltElmerKbd          = 10,  /* = gestaltADBKbdII, used in some */
                                     /*  sample code */
     gestaltADBISOKbdII       = 11,  /* ISO ADB Keyboard II */
     gestaltElmerISOKbd       = 11,  /* = gestaltADBISOKbdII, used in */
                                     /*  some sample code */
     gestaltPwrBookADBKbd     = 12,  /* PowerBook Keyboard &AT01 */
     gestaltPwrBookISOADBKbd  = 13,  /* PowerBook Keyboard (ISO) &AT01 */
     gestaltAppleAdjustKeypad = 14,  /* Apple Adjustable Keypad &AT01 */
     gestaltAppleAdjustADBKbd = 15,  /* Apple Adjustable Keyboard, incl. */
                                     /*  US, ISO and Japanese &AT01 */

     /* PowerBook Extended Keyboards &AS15 */
     gestaltPwrBkExtISOKbd    = 20,  /* PowerBook Extended Intl. */
     gestaltPwrBkExtJISKbd    = 21,  /* PowerBook Extended Japanese */
     gestaltPwrBkExtADBKbd    = 24}; /* PowerBook Extended Domestic */

     ======================================================================
     Combinations of System Global KbdType/ADB Mgr devType and
     gestaltKeyboardType values                                       &AT01
     ======================================================================
     KbdType    gestaltKeyboardType     Gestalt Name
     (hex.)     (decimal)
     ----------------------------------------------------------------------
      0x03          1                   gestaltMacKbd
      0x13          2                   gestaltMacAndPad
      0x0B          3                   gestaltMacPlusKbd
      0x02          4                   gestaltExtADBKbd
      0x01          5                   gestaltStdADBKbd
      0x06          6                   gestaltPrtblADBKbd
      0x07          7                   gestaltPrtblISOKbd
      0x04          8                   gestaltStdISOADBKbd
      0x05          9                   gestaltExtISOADBKbd
      0x08         10                   gestaltADBKbdII
      0x09         11                   gestaltADBISOKbdII
      0x0C         12                   gestaltPwrBookADBKbd
      0x0D         13                   gestaltPwrBookISOADBKbd
      0x0E         14                   gestaltAppleAdjustKeypad
      0x10         15                   gestaltAppleAdjustADBKbd, US
      0x11         15                   gestaltAppleAdjustADBKbd, ISO
      0x12         15                   gestaltAppleAdjustADBKbd, Japanese
      0x13         20                   gestaltPwrBkExtISOKbd ?
      0x14         21                   gestaltPwrBkExtJISKbd ?
      0x17         24                   gestaltPwrBkExtADBKbd ?
     ----------------------------------------------------------------------

     NOTES:
     The Apple Adjustable Keyboard doesn't have its own Gestalt keyboard
     type defined with some versions of System Software (7.1?). It changes
     a low memory global but this doesn't change the Gestalt response. This
     problem is corrected by the Hardware System Update 2.0 and later.

     If the keyboard isn't recognized by the Gestalt Mgr, an error is
     returned. &AD19

     The PowerMac 7100/66 (System 7.1.2) doesn't install this selector for
     some reason. Other Macs with Gestalt version 4 do, so it isn't
     intentional.

     You may find a GestaltEqu header file which listes the Extended ADB
     keyboard as three different types (Dometic, International and
     Japanese) instead of one as later was corrected by Apple.
     The KbdType numbers for the PowerBook Extended Keyboards were found
     with the PTCH 5 resource of the Hardware System Update 2.0.
     (Rene Ros)

     Since this selector returns the type of the keyboard last touched
     and because there can be more than one keyboard, MacDTS considers this
     selector to be obsolete. You should use GetADBInfo instead and check
     the orgADBAddr field for a keyboard (0x02) and the devType field
     contains the keyboard device type. It uses the same values as the
     KbdType low memory variable, see the table above. &AD07/AT01

kpcd (Apple Photo Access ext [1.0], part of Apple CD-ROM Software) &AT03
     gestaltApplePhotoAccessVersion?
     Returns Apple Phote Access version in BCD.

     #define gestaltApplePhotoAccessVersion? 'kpcd'

     NOTE:
     The above is what the documentation says. However it seems to return
     always 0xFFFFFF7 as response.

lmem (System [6.0.4])
     gestaltLowMemorySize
     Returns the amount of the low-memory area in bytes.

     #define gestaltLowMemorySize 'lmem' /* low-memory area size */

lram (System [6.0.4])
     gestaltLogicalRAMSize
     Returns the amount of logical memory available in bytes.

     #define gestaltLogicalRAMSize 'lram' /* logical RAM size */

     NOTE:
     The returned value may not be accurate because an adjustment to the
     number is performed to yield the best possible estimate of the
     remaining RAM. The discrepancy is usually because of different color
     depth settings for on-board video and because of the NanoKernel
     (68K emulator on Power Macintosh computers). The latter takes about
     870K. &AD18

mach (System [6.0.4]) INF
     gestaltMachineType
     Returns one of the following values, indicating the type of
     machine.

     enum {
     #define gestaltMachineType 'mach' /* machine type */

     /* RELEASED COMPUTERS */
     gestaltClassic             =   1, /* Macintosh 128K and 512 */
     gestaltMacXL               =   2, /* Macintosh XL */
     gestaltMac512KE            =   3, /* Macintosh 512KE */
     gestaltMacPlus             =   4, /* Macintosh Plus */
     gestaltMacSE               =   5, /* Macintosh SE */
     gestaltMacII               =   6, /* Macintosh II */
     gestaltMacIIx              =   7, /* Macintosh IIx */
     gestaltMacIIcx             =   8, /* Macintosh IIcx */
     gestaltMacSE030            =   9, /* Macintosh SE/30 */
     gestaltPortable            =  10, /* Macintosh Portable */
     gestaltMacPortable         =  10, /* = gestaltPortable &AD18 */
     gestaltMacIIci             =  11, /* Macintosh IIci */
     gestaltMacIIfx             =  13, /* Macintosh IIfx */
     gestaltMacClassic          =  17, /* Macintosh Classic */
     gestaltMacIIsi             =  18, /* Macintosh IIsi */
     gestaltMacLC               =  19, /* Macintosh LC */
     gestaltQuadra900           =  20, /* Macintosh Quadra 900 &AT01 */
     gestaltPowerBook170        =  21, /* Macintosh PowerBook 170 &AT01 */
     gestaltQuadra700           =  22, /* Macintosh Quadra 700 &AT01 */
     gestaltClassicII           =  23, /* Macintosh Classic II &AT01 */
     gestaltPowerBook100        =  24, /* Macintosh PowerBook 100 &AT01 */
     gestaltPowerBook140        =  25, /* Macintosh PowerBook 140 &AT01 */
     gestaltQuadra950           =  26, /* Macintosh Quadra 950 &AT01 */
     gestaltMacLCIII            =  27, /* Macintosh LC III */
     gestaltPerforma450         =  27, /* = gestaltMacLCIII &AD18 */
     gestaltPowerBook210        =  29, /* Macintosh PowerBook 210 */
     gestaltPowerBookDuo210     =  29, /* = gestaltPowerBook210 &AD18 */
     gestaltMacCentris650       =  30, /* Macintosh Centris 650 */
     gestaltPowerBook230        =  32, /* Macintosh PowerBook 230 */
     gestaltPowerBookDuo230     =  32, /* = gestaltPowerBook230 &AD18 */
     gestaltPowerBook180        =  33, /* Macintosh PowerBook 180 */
     gestaltPowerBook160        =  34, /* Macintosh PowerBook 160 */
     gestaltMacQuadra800        =  35, /* Macintosh Quadra 800 */
     gestaltMacQuadra650        =  36, /* Macintosh Quadra 650 &AT01 */
     gestaltMacLCII             =  37, /* Macintosh LC II */
     gestaltPerforma40x         =  37, /* =gestaltMacLCII */
                                       /*  Performa 400 Series &AT01 */
     gestaltPerforma430         =  37, /* =gestaltMacLCII */
                                       /*  Performa 400 Series &AT01 */
     gestaltPowerBookDuo250     =  38, /* Macintosh PowerBook Duo 250 */
                                       /*  &AT01 */
     gestaltPowerMac9150        =  39, /* Power Macintosh 9150 &AT01 */
     gestaltAWS9150_80          =  39, /*  = gestaltPowerMac9150 */
                                       /*  Workgroup Server 9150/80 */
                                       /*  &AD18 */
     gestaltPowerMac8100_110    =  40, /* Power Macintosh 8100/110 and */
                                       /*  Power Macintosh 8115/10 &AD18 */
     gestaltPowerMac5200_75     =  41, /* Power Macintosh 5200/75 &AT01 */
                                       /*   and Power Macintosh 5300 */
     gestaltPowerMac6200        =  42, /* Power Macintosh 6200 */
     gestaltMacIIvi             =  44, /* Macintosh IIvi */
     gestaltPerforma600         =  45, /* Macintosh Performa 600 */
     gestaltMacIIvm             =  45, /* = gestaltPerforma600 &AD18 */
     gestaltPowerMac7100_80     =  47, /* Power Macintosh 7100/80 &AD18 */
     gestaltMacIIvx             =  48, /* Macintosh IIvx */
     gestaltMacColorClassic     =  49, /* Macintosh Color Classic */
     gestaltPerforma250         =  49, /* = gestaltMacColorClassic &AD18 */
     gestaltPowerBook165c       =  50, /* Macintosh PowerBook 165c */
     gestaltMacCentris610       =  52, /* Macintosh Centris 610 */
     gestaltMacQuadra610        =  53, /* Macintosh Quadra 610 &AT01 */
     gestaltPowerBook145        =  54, /* Macintosh PowerBook 145 and */
                                       /*  145b &AT01 */
     gestaltPowerMac8100_100    =  55, /* Power Macintosh 8100/100 &AD18 */
     gestaltMacLC520            =  56, /* Macintosh LC 520 &AT01 */
     gestaltAWS9150_120         =  57, /* Workgroup Server 9150/120 */
                                       /*  &AD23 */
     gestaltMacCentris660AV     =  60, /* Macintosh Centris 660AV &AT01 */
     gestaltPerforma460         =  62, /* Macintosh Performa 460 */
     gestaltPerforma46x         =  62, /* = gestaltPerforma460 &AD18 */
     gestaltPowerMac8100_80     =  65, /* Power Macintosh 8100/80 */
     gestaltPowerMac9500        =  67, /* Power Macintosh 9500/120 and */
                                       /*  Power Macintosh 9500/132 */
                                       /*  &AT01 */
     gestaltPowerMac7500        =  68, /* Power Macintosh 7500 */
     gestaltPowerMac8500        =  69, /* Power Macintosh 8500 */
     gestaltPowerBook180c       =  71, /* Macintosh PowerBook 180c &AT01 */
     gestaltPowerBook520_540    =  72, /* Macintosh PowerBook 520/520c */
                                       /*  and 540/540c use Power Mgr */
                                       /*  call MaximumProcessorSpeed: */
                                       /*  25 and 33 mHz resp. &AT01 */
     gestaltPowerBook500        =  72, /* = gestaltPowerBook520_540 */
                                       /*  &AD18 */
                                       /*  Macintosh PowerBook 500 */
                                       /*  series */
     gestaltPowerMac6100_60     =  75, /* Power Macintosh 6100/60 */
     gestaltPerforma611x        =  75, /* =gestaltPowerMac6100_60 */
                                       /* Performa 611x Series &AT01 */
     gestaltPowerBookDuo270c    =  77, /* Macintosh PowerBook Duo 270c */
                                       /*  &AT01 */
     gestaltMacQuadra840AV      =  78, /* Macintosh Quadra 840AV &AT01 */
     gestaltMacLC550            =  80, /* Macintosh LC 550 &AT01 */
     gestaltPerforma550         =  80, /* = gestaltMacLC550 &AD18 */
     gestaltPerforma560         =  80, /* = gestaltMacLC550 &AT01 */
     gestaltMacColorClassicII?  =  83, /* Macintosh Color Classic II */
     gestaltPowerBook165        =  84, /* Macintosh PowerBook 165 &AT01 */
     gestaltPowerBook190        =  85, /* Macintosh PowerBook 190 */
                                       /*  Macintosh PowerBook 190cs ? */
                                       /*  &AD25 */
                                       /*  ALERT! According to Dev. */
                                       /*  Note, same as Q650 PPC */
                                       /*  upgrade card? Value 85 */
                                       /*  returned on a PB190cs */
                                       /*  prototype? (Anonymous) */
     gestaltMacTV               =  88, /* Macintosh TV */
     gestaltMacLC475            =  89, /* Macintosh LC 475 &AT01 */
     gestaltPerforma47x         =  89, /* = gestaltMacLC475 &AD18 */
     gestaltMacLC575            =  92, /* Macintosh LC 575 &AT01 */
     gestaltPerforma57x         =  92, /* = gestaltMacLC575 &AT01 */
     gestaltMacQuadra605        =  94, /* Macintosh Quadra 605 &AT01 */
     gestaltMacLC630            =  98, /* Macintosh LC 630, see below */
                                       /*  &AT01 */
     gestaltMacQuadra630        =  98, /* Macintosh Quadra 630 &AT01 */
                                       /*  Q630 has MC68040, LC 630 has */
                                       /*  MC68LC040 but can upgrade */
     gestaltMac630              =  98, /* = gestaltMacLC630 */
                                       /*  = gestaltMacQuadra630 */
                                       /*  Macintosh 630 series &AD18 */
     gestaltTellShow            =  98, /* = gestaltMacLC630 */
                                       /*  = gestaltMacQuadra630 */
                                       /*  = gestaltMac630 */
                                       /*  Codename for LC630 &AD16 */
     gestaltMacLC580            =  99, /* Macintosh LC 580 &AD18 */
     gestaltTellXfmr            =  99, /* = gestaltMacLC580 */
                                       /*  Codename LC580 &AD16 */
     gestaltPerforma580         =  99, /* = gestaltMacLC580 &AT01 */
     gestaltPowerMac6100_66     = 100, /* Power Macintosh 6100/66 */
     gestaltPowerBookDuo280     = 102, /* Macintosh PowerBook Duo 280 */
     gestaltPowerBookDuo280c    = 103, /* Macintosh PowerBook Duo 280c*/
     gestaltPowerMac7200        = 108, /* Power Macintosh 7200/75 */
                                       /*  Power Macintosh 7200/90 ? */
     gestaltPowerMac7100_66     = 112, /* Power Macintosh 7100/66 */
     gestaltPowerBook150        = 115, /* Macintosh PowerBook 150 */
     gestaltPowerBook2300?      = 124, /* Macintosh PowerBook 2300c */
                                       /*  &AD27/AT01 */
     gestaltPowerBook5300       = 128, /* Macintosh PowerBook 5300, */
                                       /*  Macintosh PowerBook 5300c, */
                                       /*  Macintosh PowerBook 5300cs, */
                                       /*  and Macintosh PowerBook */
                                       /*  5300ce &AT01/AD26 See also */
                                       /*  #129 in OBSERVED MACHINE */
                                       /*  VALUES IN SYSTEM SOFTWARE */
                                       /*  part */

     /* RELEASED UPGRADE CARDS (&AD18 and &AT01) */
     gestaltPowerMac475         = 104, /* LC475, P47x and Q605 PPC */
     gestaltPowerMacLC475       = 104, /* = gestaltPowerMac475 */
     gestaltPowerMacPerforma47x = 104, /* = gestaltPowerMac475 */
                                       /*  = gestaltPowerMacLC475 */
     gestaltPowerMac575         = 105, /* LC575 and P57x PPC */
     gestaltPowerMacLC575       = 105, /* = gestaltPowerMac575 */
     gestaltPowerMacPerforma57x = 105, /* = gestaltPowerMac575 */
                                       /*  = gestaltPowerMacLC575 */
     gestaltPowerMac630         = 106, /* Q630, LC630 and P63x PPC */
     gestaltPowerMacQuadra630   = 106, /* = gestaltPowerMac630 */
     gestaltPowerMacLC630       = 106, /* = gestaltPowerMac630 */
                                       /*  = gestaltPowerMacQuadra630 */
     gestaltPowerMacPerforma63x = 106, /* = gestaltPowerMac630 */
                                       /*  = gestaltPowerMacQuadra630 */
                                       /*  = gestaltPowerMacLC630 */
     gestaltPowerMac580         = 107, /* LC580 (and P58x?) PPC */
     gestaltPowerMacLC580       = 107, /* = gestaltPowerMac580 */
     gestaltPowerMac700         = 116, /* Q700 PPC */
     gestaltPowerMacQuadra700   = 116, /* = gestaltPowerMac700 */
     gestaltPowerMac900         = 117, /* Q900 PPC */
     gestaltPowerMacQuadra900   = 117, /* = gestaltPowerMac900 */
     gestaltPowerMac950         = 118, /* Q950 PPC */
     gestaltPowerMacQuadra950   = 118, /* = gestaltPowerMac950 */
     gestaltPowerMacC610        = 119, /* C610 PPC */
     gestaltPowerMacCentris610  = 119, /* = gestaltPowerMacC610 */
     gestaltPowerMacC650        = 120, /* C650 PPC */
     gestaltPowerMacCentris650  = 120, /* = gestaltPowerMacC650 */
     gestaltPowerMacQ610        = 121, /* Q610 PPC */
     gestaltPowerMacQuadra610   = 121, /* = gestaltPowerMacQ610 */
     gestaltPowerMacQ650        = 122, /* Q650 PPC */
     gestaltPowerMacQuadra650   = 122, /* = gestaltPowerMacQ650 */
     gestaltPowerMac800         = 123, /* Q800 PPC */
     gestaltPowerMacQuadra800   = 123, /* = gestaltPowerMacQ800 */
     gestaltPPCPowerBook520_540 = 124, /* Macintosh PowerBook 5xx PPC */
                                       /*  upgrade card &AD28/AT01 */

     /* NEVER TO BE RELEASED */
     /* The following machine values are used by not to be released ROM */
     /* images. If you observe any of these values, it's a prerelease */
     /* system. */
     gestaltPowerMac6100_66?    =  46, /* Power Macintosh 6100/66 */
     gestaltPowerMac8100_100?   =  66, /* Power Macintosh 8100/100 */
     gestaltPowerMac7100_80?    = 113, /* Power Macintosh 7100/80 */

     /* UNKNOWN RELEASED COMPUTERS */
     gestaltPowerBook550c?      = ???, /* Macintosh PowerBook 550c */

     /* OBSERVED UNRELEASED COMPUTERS */
     gestaltPowerMac8100_120    =  12, /* Power Macintosh 8100/120 */
     gestalt???                 =  43, /* pre-release Tempest/Cyclone */
     gestalt???                 =  51, /* System 7.5 Update 2.0 */
     gestalt???                 =  59, /* System 7.5 Update 1.0 */
     gestaltPowerMac8100_60?    =  61, /* Power Macintosh 8100/80 */
                                       /*  running at 60 MHz}
     gestaltPowerMac8100_60?    =  64, /* Power Macintosh 8100/60 and */
                                       /*  Power Macintosh 8100/80 */
                                       /*  when running at 66.6 MHz */
     gestalt???                 =  74, /* pre-release Power Mac named */
                                       /*  'PDM Evt 1 (R.I.P.)' */
     gestaltLC475_20?           =  86, /* Q605 as a LC475 at 20 Mhz */
                                       /*  instead of 25 Mhz */
     gestaltLC575_20?           =  87, /* LC575 at 20 MHz instead of */
                                       /*  33 MHz */
     gestaltLC475_33?           =  90, /* Q605 as a LC475 at 33 Mhz */
                                       /*  instead of 25 Mhz */
     gestaltLC575_25?           =  91, /* LC575 at 25 MHz instead of */
                                       /*  33 MHz */
     gestaltQ605_20?            =  93, /* Q605 at 20 Mhz instead of */
                                       /*  25 MHz */
     gestaltQ605_33?            =  95, /* Q605 at 33 Mhz instead of */
                                       /*  25 MHz */
     gestaltPowerMac6100_80?    = 101, /* Power Macintosh 6100/80 */
     gestaltPowerMac7100_60?    = 111, /* Power Macintosh 7100/60 */
     gestaltPowerMac7100_80b?   = 113, /* PM 7100/66 at 80 Mhz */
                                       /* value <> PM 7100/80 ! */
     gestaltPowerMac7100_82?    = 114, /* Macintosh 7100/82 */

     /* OBSERVED MACHINE VALUES IN SYSTEM SOFTWARE */
     /* these values were found in enablers, either in the gbly */
     /* resource or in the machine name STR# resource. */
     gestaltPaulaMac?           =  31, /* "Paula's Desk Macintosh" in */
                                       /*  PowerPC Enabler 1.1 */
     gestalt???                 =  63, /* System 7.5 Update 2.0 */
     gestalt???                 =  73, /* System 7.5 Update 1.0 */
     gestalt???                 =  79, /* System 7.5 Update 2.0 */
     gestalt???                 =  81, /* System 7.5 Update 1.0 */
     gestalt???                 = 114, /* System 7.5 Update 1.0 */
     gestalt???                 = 125, /* MAE Enabler */
     gestalt???                 = 126, /* MAE Enabler */
     gestaltPowerBook5300?      = 129, /* Macintosh PowerBook 5300, */
                                       /*  Macintosh PowerBook 5300c, */
                                       /*  Macintosh PowerBook 5300cs, */
                                       /*  and Macintosh PowerBook */
                                       /*  5300ce See also #128 in */
                                       /*  RELEASED COMPUTERS part */
     gestaltPowerMacIIci?       = 206, /* IIci PPC, MacsBugs 2.5.2 */
     gestaltPowerMacIIsi?       = 207, /* IIsi PPC, MacsBugs 2.5.2 */
     gestaltPowerMacIIvi?       = 208, /* IIvi PPC, MacsBugs 2.5.2 */
     gestaltPowerMacIIvx?       = 209, /* IIvx PPC, MacsBugs 2.5.2 */
     gestaltPowerMacIIvm?       = 210, /* IIvm PPC, MacsBugs 2.5.2 */
     gestaltPowerMacIIfx?       = 211, /* IIfx PPC, MacsBugs 2.5.2 */
     };

     NOTES:
     The Power Macintosh computers also set the three low bits of a 32-bit
     register at a specified address to a machine identification code.

     ======================================================================
     Power Macintosh register identification codes
     ======================================================================
     Machine                      Address        Register bits  Source
     ----------------------------------------------------------------------
     Power Macintosh 5200         ???            ???
     Power Macintosh 6100         0x5FFF FFFC    000
     Power Macintosh 7100         0x5FFF FFFC    010
     Power Macintosh 7200         ???            ???
     Power Macintosh 7500         ???            ???
     Power Macintosh 8100         0x5FFF FFFC    011
     Power Macintosh 8500         ???            ???
     Power Macintosh 9150         0x5FFF FFFC    100            &AD23
     Power Macintosh 9500         ???
     ----------------------------------------------------------------------

     An upgraded Centris 610 doesn't return 119 (Centris 610 upgrade card?)
     but 75 (PowerMac 6100). (Carl R. Osterwald)
     With an upgraded Quadra 700 the upgrade card value is returned. The
     values for the upgrade cards came from the kMachineNameStrID resource
     from the Power Mac Upgrade Card enabler distributed with System
     Update 3.0 on disk 2. The Power Macintosh Card 1.0 control panel
     checks both the Quadra/Centris machine IDs and the ones for the
     upgrade cards to determine if it can run. (Rene Ros)

     With systems prior to System 7.1 these selectors return the same
     values for the:
     - Macintosh LC and
       Macintosh LC II (LC has MC68020,LC II has MC68030)
     - Macintosh PowerBook 140 and
       Macintosh PowerBook 145 (use MaximumProcessorSpeed from Power Mgr?,
                                16 and 25 MHz resp.)

     The Developer Notes (available from APDA, on ftp.info.apple.com and on
     the Developer CD-ROM Series) about some PowerBook models (100, 140,
     170, 190, PB2300 and PPC Upgrade PB5xx) provide incorrect information
     regarding the machine type returned by the Gestalt Manager.
     The Developer Note on the Power Macintosh 9500 doesn't contain any
     Gestalt info, so it can't be wrong!
     The Developer Note on the Power Macintosh 7200 says the type value is
     0x108, this must be 108 (decimal!). (Eric-Paul Rebel)

     IM More Macintosh Toolbox (p. 1-127) lists this selector as
     'gestaltMachineModel'.

     You can use the returned value as an index with GetIndString
     to get the machine's name. The STR# resource ID is:
       enum {
       kMachineNameStrID = -16395};
     See for more information on the Machine Name STR# resource the
     'Machine Name' section in the 'Reports' chapter.

     To check which processor clockspeed the machine is running at,
     use the 'pclk' selector. For the bus clockspeed, use the 'bclk'
     selector.

     See for more information on hardware modified Macintosh computers
     (i.e. clock chipping) and the values they return the 'Clock Chipped'
     section in the 'Reports' chapter.

     See for more information on clones the 'Macintosh Clones' section in
     the 'Reports' chapter.

     See for more information on relabled Macintosh models (i.e. the
     Performa models) the 'Relabled Macintosh Models' section in the
     'Reports' chapter.

malr (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltSMPMailerVersion
     Returns the SMP Mailer version as INTEGER. Returns zero if not
     present and available.

     #define gestaltSMPMailerVersion 'malr' /* SMP Mailer version */

micn (System [6.0.4]) INF
     gestaltMachineIcon
     Returns an icon family resource ID for the current type of
     Macintosh.

     #define gestaltMachineIcon 'micn' /* machine ICON/cicn res ID */

     NOTE:
     It appears as if this selector always returns the ID of the generic
     Macintosh icon (like in the Welcome screen), starting with System 7.5.
     On a PowerBook 5300 with System 7.5.2 installed the icon ID is
     returned for an icon showing a generic portable computer. (Rene Ros)

misc (System [6.0.5])
     gestaltMiscAttr
     Returns information about miscellaneous pieces of software or
     hardware.

     enum {
     #define gestaltMiscAttr 'misc' /* miscellaneous attributes */
     gestaltScrollingThrottle = 0,
     gestaltBootGlobals       = 1,  /* Boot Globals &M02, obsolete? */
     gestaltSquareMenuBar     = 2};

mixd (System? [7.1.2?])
     gestaltMixedModeAttr
     Returns information about the Mixed Mode Manager.

     enum {
     #define gestaltMixedModeAttr 'mixd' /* Mixed Mode Mgr attributes */
     gestaltPowerPCAware = 0}; /* True if MMMgr Supports PowerPC */

     NOTE:
     The name 'gestaltMixedModeVersion' (as used in IM OS Utilites and
     IM PowerPC System Software) is incorrect. It may be listed in
     Gestalt header files for a limited time for backwards compatibility.
     (Rene Ros)

mmu  (System [6.0.4])
     gestaltMMUType
     Returns a value that indicates the type of MMU currently installed,
     if any.

     enum {
     #define gestaltMMUType 'mmu ' /* MMU Type */
     gestaltNoMMU    = 0,  /* no MMU */
     gestaltAMU      = 1,  /* AMU */
     gestalt68851    = 2,  /* 68851 MMU */
     gestalt68030MMU = 3,  /* built-in 68030 MMU */
     gestalt68040MMU = 4,  /* built-in 68040/68LC040 &S01 */
     gestaltEMMU1    = 5}; /* Emulated MMU type 1, PowerPC MMU &AS05 */

     NOTE:
     You should also use this selector to test for the existence of
     _MemoryDispatch if your code runs before system patches are applied
     on machines of which the ROM implements _MemoryDispatch but the
     machine doesn't have a MMU. This may happen with a Mac LC, whose
     ROM is derived from the Macintosh IIci. &AT09

mtcp (MacTCP cp [1.1])
     (Open Tpt MacTCP [3.0a2])
     gestaltMacTCPVersion? &AD01
     Returns the version of MacTCP, if opened, as index-value. If MacTCP is
     not opened a value of 0 is returned.

     #define gestaltMacTCPVersion? 'mtcp'

     ======================================================================
     MacTCP responses
     ======================================================================
     Version   Response   Remarks
     ----------------------------------------------------------------------
      all         0       MacTCP not opened.
      1.1         1
      1.1.1       2
      2.0.x       3
      3.0         4       Part of Open Transport 1.0
     ----------------------------------------------------------------------

     NOTE:
     No constants are defined by the documentation.

nlup (System [7.0])
     gestaltStdNBPAttr
     Returns information about the call StandardNBP.

     enum {
     #define gestaltStdNBPAttr 'nlup' /* Standard NBP attributes */
     gestaltStdNBPPresent              = 0,
     gestaltStdNBPSupportsAutoPosition = 1}; /* StandardNBP takes */
                                             /*  (-1,-1) for auto- */
                                             /*  positioning */

nmgr (System [6.0.5])
     gestaltNotificationMgrAttr
     Returns information about the Notification Manager.

     enum {
     #define gestaltNotificationMgrAttr 'nmgr' /* Notification Mgr attr. */
     gestaltNotificationPresent = 0};

nreg (System [7.5.1])
     gestaltNameRegistryVersion &AD21
     Returns the version of Name Registry as ???

     #define gestaltNameRegistryVersion 'nreg';

     NOTE:
     Seen installed on a Performa 5200 and 6200 both with System 7.5.1, it
     returned 0 though! (Rene Ros)

nubs (System [6.0.4, 6.0.5, 6.0.7, discontinued])
     gestaltNuBusSlotCount
     Returns count of NuBus slots.

     #define gestaltNuBusSlotCount 'nubs' /* NuBus slot count */

nvsv (System [Copland?])
     gestaltNavigationServicesAttr &AD21
     Returns information about the Navigation Services.

     enum {
     #define gestaltNavigationServicesAttr 'nvsv'
     gestaltNavigationServicesPresent = 0};

     WARNING:
     From the Preliminary Copland Headers. May change in the future.

Apple System Software (O-S)
===========================
This chapter lists selector codes of which the meaning is known and the
first character of the selector code is in the O-S range.

ocet (PowerTalk Manager ext [1.0?], part of PowerTalk)
     gestaltOCEToolboxVersion
     Returns the versions of the S&F Server and the OCE Toolbox as BCD.
     Returns zero if not present and available.

     enum {
     #define gestaltOCEToolboxVersion 'ocet' /* OCE Toolbox version */
     gestaltOCETB    = 0x0102,  /* current OCE Toolbox version 1.0.2 */
     gestaltSFServer = 0x0100}; /* current S&F Server version 1.0 */

     NOTE:
     The high order word will represent the S&F Server version number, and
     the low order the OCE Toolbox version number both as BCD.
     These will be zero until the component is up and running.

oceu (PowerTalk Manager ext [1.0?], part of PowerTalk)
     gestaltOCEToolboxAttr
     Returns information about the Open Colloboration Environment Toolbox.

     enum {
     #define gestaltOCEToolboxAttr 'oceu' /* OCE Toolbox attributes */
     gestaltOCETBPresent            = 0x1,   /* OCE toolbox is present, */
                                             /*  not running */
     gestaltOCETBAvailable          = 0x2,   /* OCE toolbox is running */
                                             /*  and available */
     gestaltOCESFServerAvailable    = 0x4,   /* S&F Server is running */
                                             /*  and available */
     gestaltOCTBNativeGlueAvailable = 0x10}; /* PowerPC glue available */
                                             /*  &AS13 */

     NOTE:
     Any (future) remaining OCE attributes may not be established
     correctly until the attribute gestaltOCETBAvailable is set.

opfw (System [7.5.2])
     gestaltOpenFirmwareInfo
     Returns ???

     enum {
     #define gestaltOpenFirmwareInfo 'opfw'
     gestalt??? = 1};

     NOTE:
     This selector may be installed but returns gestaltUnknownErr instead
     of zero. (Rene Ros)

os   (System [6.0.4, 7.0 and later])
     (Process Manager INIT ext [???], part of ???)
     gestaltOSAttr
     Returns general information about the Operating System.

     enum {
     #define gestaltOSAttr 'os  ' /* O/S attributes */
     gestaltSysZoneGrowable      =  0,
     gestaltLaunchCanReturn      =  1,
     gestaltLaunchFullFileSpec   =  2,
     gestaltLaunchControl        =  3,
     gestaltTempMemSupport       =  4,
     gestaltRealTempMemory       =  5,
     gestaltTempMemTracked       =  6,
     gestaltIPCSupport           =  7,
     gestaltSysDebuggerSupport   =  8,
     gestaltSkiaGlobalsSwitched  =  9,  /* &AS05 */
     gestaltBgndMouseDownSupport?= 10,  /* unnamed Process Mgr routine */
                                        /*  available to indicate if a */
                                        /*  layer switch is wanted by the */
                                        /*  application when one of its */
                                        /*  windows is clicked while in */
                                        /*  the background. &AS04 */
     gestalt???                  = 11,  /* on PowerPC, Performa 630 and */
                                        /*  PB180? */
     gestalt???                  = 13,  /* unknown, System 7.5 */
     gestalt???                  = 14,  /* unknown, System 7.5 */
     gestalt???                  = 15}; /* unknown, System 7.5.1 */

     NOTES:
     See the Process Manager chapter in IM Processes for more information
     about the launch control features. And the Memory Manager chapter in
     IM Memory about the memory features.

     Under A/UX 2.x this selector incorrectly returns information about the
     Process Manager, which isn't available. You should test for A/UX 3.0 or
     later by using the gestaltAUXVersion ('a/ux') selector. &AT10

     More information on the unnamed routine which presence is indicated
     by the gestaltBgndMouseDownSupport? bit can be found in the orginal
     email from Marco Piovanelli to the editor of the GSL. You can get a
     copy by emailing this command to the mail archive server:
          'archive get src/bgndmouse.txt'

     The header file which lists the gestaltSkiaGlobalsSwitched bit says
     this:
     /*gestaltSkiaGlobalsSwitched is #9. I don't know why it is not here*/

     "Skia" was the code name for QuickDraw GX (MacsBug uses it for trap
     0xA832, which is the main QuickDraw GX trap).
     (Lawrence D'Oliveiro, Anonymous)

ostt (System [6.0.8?])
     gestaltOSTable
     Returns the base address of the Operating System trap table.

     #define gestaltOSTable 'ostt' /* O/S trap table base */

osyv (sysvINIT ext [???] by T. Tanaka, Apple Computer Japan Inc.)
     gestaltOldSystemVersion?
     Returns the version of the system file as BCD which was returned
     before sysvINIT replaced the gestalt definition with a corrected one.

     #define gestaltOldSystemVersion? 'osyv'

     NOTE:
     Because of a bug with KanjiTalk 6.0.7 this extension (snippet code,
     available on Developer CD Series) replaces the standard 'sysv' gestalt
     function with a corrected one to return 0x0607 and installs the
     'osyv' selector which uses the replaced gestalt definition. &M03

pccd (System? [???])
     gestaltCardServicesAttr &AD24
     Returns information about the PC Card Manager (for managing i.e.
     PCMCIA cards).

     enum {
     #define gestaltCardServicesAttr 'pccd', /* Card Services attributes */
     gestaltCardServicesPresent = 0};        /* if set, Card Services is */
                                             /* present */

     NOTE:
     This selector is not implemented with any current system software
     (7.5.1) on the PowerBook 500 Series computers.

pcxg (PC Exchange cp? [???]) &AS04/AS05
     gestaltPCXAttr
     Returns information about PC Exchange.

     enum {
     #define gestaltPCXAttr 'pcxg'   /* PC Exchange attributes */
     gestaltPCXHas8and16BitFAT = 0,  /* PC Exchange supports both 8 and */
                                     /*  16 bit FATs */
     gestaltPCXHasProDOS       = 1}; /* PC Exchange supports ProDOS */

pgsz (System [6.0.4])
     gestaltLogicalPageSize
     Returns the logical page size in bytes.

     #define gestaltLogicalPageSize 'pgsz' /* logical page size */

     NOTE:
     The value is unknown on 68000 machines, Gestalt will return an error.

pop! (System [7.0])
     gestaltPopupAttr
     Returns information about the pop-up control definition.

     enum {
     #define gestaltPopupAttr 'pop!' /* pop-up CDEF attributes */
     gestaltPopupPresent = 0}; /* pop-up CDEF available */

powr (System [6.0.4])
     gestaltPowerMgrAttr
     Returns information about the Power Manager, if present.

     enum {
     #define gestaltPowerMgrAttr 'powr' /* Power Mgr attributes */
     gestaltPMgrExists         = 0,     /* Power Mgr is present */
     gestaltPMgrCPUIdle        = 1,     /* CPU can idle */
     gestaltPMgrSCC            = 2,     /* can stop SCC clock */
     gestaltPMgrSound          = 3,     /* can shut off sound circuits */
     gestaltPMgrDispatchExists = 4};    /* dispatch routines are present */

     NOTE:
     Bit 4 seen set on Power Mac codenamed Catalyst with System 7.5.2.
     This is because some desktop machines support the Power Manager for
     things like Energy Star compliance. (Two anonymous contributors)

ppc  (System [7.0])
     gestaltPPCToolboxAttr
     Returns information about the capabilities of the PPC Toolbox.

     enum {
     #define gestaltPPCToolboxAttr 'ppc '  /* PPC Toolbox attributes */
     gestaltPPCToolboxPresent          = 0x0000,  /* Requires PPCInit to */
                                                  /*  be called */
     gestaltPPCSupportsIncoming        = 0x0001,  /* Deny incoming net */
                                                  /*  requests */
     gestaltPPCSupportsOutGoing        = 0x0002,  /* Deny outgoing net */
                                                  /*  requests */
     gestaltPPCSupportsRealTime        = 0x1000,  /* Supports real-time */
                                                  /*  delivery */
     gestaltPPCSupportsStoreAndForward = 0x2000,  /* Supports store and */
                                                  /*  forward delivery */
     gestaltPPCSupportsDontCare        = 0x4000}; /* Supports specifi- */
                                                  /*  cation of Don't */
                                                  /*  care */

     NOTE:
     The first thing that is confusing is that, unlike other selectors
     returning attributes, the responses are not bit values, but bit masks.
     This means you simply AND the value with the response to test the bit.
     The second thing that is confusing is how to interpret
          gestaltPPCToolboxPresent = 0x0000.
     What this means is that if the PPC toolbox is present, but has not
     been initialised (by calling PPCInit), then gestaltPPCToolboxAttr
     returns 0x0000. In reality, PPCInit gets called by the Process
     Manager before any applications get launched, so no applications will
     actually see this response. (Dave Radcliffe)

proc (System [6.0.4])
     gestaltProcessorType
     Returns a value that indicates the type of processor that is
     currently running (or emulated on Power Macs or under MAE).

     enum {
     #define gestaltProcessorType 'proc' /* processor type */
     gestalt68000 = 1,  /* MC68000 */
     gestalt68010 = 2,  /* MC68010 */
     gestalt68020 = 3,  /* MC68020 */
     gestalt68030 = 4,  /* MC68030 */
     gestalt68040 = 5}; /* MC68040 &S01 */

     NOTES:
     The 68LC040 responds as type gestalt68040 but doesn't have a FPU. The
     user can swap out the 68LC040 and put in a real 68040 with FPU, so
     just checking the machineType or the processorType isn't enough.
     (Dave Radcliffe)

     Has there been a 68EC030 processor??? I assume it returns
     gestalt68030 but doesn't have an MMU. (Rene Ros)

     On a Power Macintosh the Gestalt function returns, although a 68LC040
     is emulated, the value gestalt68020. This return value is intended to
     highlight the two ways in which the 68LC040 Emulator more closely
     resembles a 68020 processor than a 68040 processor. &AD11

prpv (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltSDPPromptVersion
     Returns the SDP Prompt version as INTEGER. Returns zero if not
     present and available.

     #define gestaltSDPPromptVersion 'prpv' /* SDP Prompt version */

prty (System [6.0.4])
     gestaltParityAttr
     Returns information about the parity-checking abilities of the
     machine.

     enum {
     #define gestaltParityAttr 'prty' /* parity attributes */
     gestaltHasParityCapability = 0,
     gestaltParityEnabled       = 1};

pwky (System Update enbl [7.5 upd 2.0])
     gestaltPowerKeyAddr?
     Returns a pointer to a routine of type

     typedef pascal OSErr (*PwrKeyProc)(short item, short action);

     to enable/disable the PowerKey and/or Shutdown Alert.

     #define gestaltPowerKeyAddr? 'pwky'

     NOTE:
     See 'Disabling PowerKey' in the 'Reports' chapter for more
     information.

qd   (System [6.0.4])
     gestaltQuickdrawVersion
     Returns the version of QuickDraw currently present as 2-byte value.

     enum {
     #define gestaltQuickdrawVersion 'qd  ' /* QuickDraw version */
     gestaltOriginalQD  = 0x000,
     gestaltOriginalQD1 = 0x001,
     gestalt8BitQD      = 0x100,
     gestalt32BitQD     = 0x200,
     gestalt32BitQD11   = 0x210,
     gestalt32BitQD12   = 0x220,
     gestalt32BitQD13   = 0x230,
     gestalt32BitQD135? = 0x235,  /* with System 7.1.2, ROM = 3072K? */
     gestalt32BitQD139? = 0x239,  /* with System 7.5.1 on Power Macs */
                                  /*  &AT12 */
     gestalt32BitQD141? = 0x241}; /* with System 7.5.2 */

     ======================================================================
     Possible Combinations of ROM Versions and System Software Versions
     ======================================================================
     ROM Class             System Version         Gestalt Value
     ----------------------------------------------------------------------
     Black-and-white class <  7.0                 gestaltOriginalQD
     (ROM < 256K)          >= 7.0                 gestaltOriginalQD and
                                             gestaltSystemVersion >= 0x0700

     Color QD class        <  7.0, no INITs       gestalt8BitQD
     (ROM = 256K)          6.0.3/6.0.4 and        gestalt32BitQD
                           32-Bit QD INIT 1.0
                           6.0.5-6.0.8 and        gestalt32BitQD12
                           32-Bit QD INIT 1.2
                           >= 7.0                 gestalt32BitQD13

     ci class              6.0.4                  gestalt32BitQD + 1
     (256K < ROM >= 3072K) 6.0.5-6.0.8            gestalt32BitQD12
                           >= 7.0                 gestalt32BitQD13
     SuperROM?             7.1.2-7.5?             gestalt32BitQD135?
     (ROM = 3072K)         7.5.1?                 gestalt32BitQD139?
                           7.5.2?                 gestalt32BitQD141?
     ----------------------------------------------------------------------
     (Original source: D e v e l o p 14, June 1993, p. 56;
      Info on System 7.1.2 and later based on observations and technical
      notes.)

     NOTE:
     gestalt32BitQD11 is never returned and gestalt32BitQD + 1 means
     0x0201 as response value and doesn't has a constant defined.
     Another QuickDraw version is System 7 with a black-and-white class
     machine.

     Color QuickDraw is only available on 68020 and greater CPUs, and
     this selector always returns gestaltOriginalQD on 68000 machines,
     even when running System 7. &AT11

qdrw (System [7.0])
     gestaltQuickDrawFeatures &S01
     Returns information about QuickDraw.

     enum {
     #define gestaltQuickDrawFeatures 'qdrw'     /* QuickDraw attributes */
     #define gestaltQuickDrawFeaturesAttr 'qdrw' /* used in some headers */
     gestaltHasColor          = 0,
     gestaltHasDeepGWorlds    = 1,
     gestaltHasDirectPixMaps  = 2,
     gestaltHasGrayishTextOr  = 3,
     gestaltSupportsMirroring = 4}; /* &AD12 */

     NOTES:
     There is a bug in the 'qdrw' selector that causes it to report that
     Color QuickDraw is always present, even on machines that don't support
     it. Apple has acknowledged this bug on AppleLink. (Chris Wysocki)
     Use SysEnvirons instead or test for the QD version ('qd  ') being
     8-bit QD or later.

qtim (QuickTime ext [1.0])
     gestaltQuickTime
     gestaltQuickTimeVersion
     Returns QuickTime version as NumVersion.

     #define gestaltQuickTime 'qtim' /* Movie Toolbox Availability */
     #define gestaltQuickTimeVersion 'qtim' /* Movie Toolbox version */

     NOTES:
     The returned version is obtained from 'vers' resource ID# 1.

     Initially the name 'gestaltQuickTime' was used to test for the
     availability of QuickTime. The fact that is always returned a
     version number was not documented until later. Then the name
     'gestaltQuickTimeVersion' was defined. (Rene Ros)

     See 'Reports' chapter (QuickTime section) for more information.

qtrs (QuickTime PowerPlug ext [1.0?])
     gestaltQuickTimeFeatures &AS06

     enum {
     #define gestaltQuickTimeFeatures 'qtrs' /* QT Features attributes */
     gestaltPPCQuickTimeLibPresent = 0}; /* PowerPC QT glue library is */
                                         /*  present */

     NOTE:
     The gestaltPPCQuickTimeLibPresent bit indicates that the native
     QuickTime interface library is available and can be called by native
     PowerPC applications. (Dave Radcliffe)
     See for more info Technical Note
     'QT 01 - Inside Macintosh: QuickTime Addendum'.

ram  (System [6.0.4])
     gestaltPhysicalRAMSize
     Returns the number of bytes of the physical RAM currently installed.

     #define gestaltPhysicalRAMSize 'ram ' /* physical RAM */

rbv  (System [6.0.4, discontinued?]) &AS04
     gestaltRBVAddr
     Returns the address of the RBV.

     #define gestaltRBVAddr 'rbv ' /* RBV address */

reno (Apple Guide ext [1.2?], part of System 7.5 and later)
     ???
     Indicates presence "of the Reno system extension." (Reno is the
     mechanism behind Apple Guide for managing the help data-bases?)

rom  (System [6.0.4]) INF
     gestaltROMSize
     Returns the size of the installed ROM in bytes.

     #define gestaltROMSize 'rom ' /* ROM size */

     NOTE:
     On Power Macintosh computers this selector returns the ROM size minus
     the 68K emulator portion, which uses about 1 MB. &AD18

romv (System [6.0.4]) INF
     gestaltROMVersion
     Returns the version number of the installed ROM.

     #define gestaltROMVersion 'romv' /* ROM version */

rsrc (System [should work since 7.0?])
     gestaltResourceMgrAttr
     Returns information about the Resource Manager.

     enum {
     #define gestaltResourceMgrAttr 'rsrc' /* Resource Mgr attributes */
     gestaltPartialRsrcs       = 0,
     gestaltResourceOverrides? = 1}; /* resource map overrides? */

     NOTE:
     Under System 7, bit 0 that tells if you have partial resource support
     doesn't work right. The selector is undefined under System 7.0 and
     7.0.1 even though the partial resource calls are available. This has
     been acknowledged by Apple. (Michael Hecht, Quinn)

rtmr (System? [7.1.1?])
     gestaltRealtimeMgrAttr
     Returns information about the Realtime Manager.

     enum {
     #define gestaltRealtimeMgrAttr 'rtmr' /* Realtime Mgr attributes */
     gestaltRealtimeMgrPresent = 0}; /* Realtime Mgr is present */

     NOTE:
     If the RealTime Mgr is present this means the ARTA routines are
     available to determine if and how many DSPs are installed.
     (Zalman Stern)

sccr (System [6.0.4, discontinued]) &AS04
     gestaltSCCReadAddr
     Returns the address of SCC read ports.

     #define gestaltSCCReadAddr 'sccr' /* SCC read ports address */

sccw (System [6.0.4, discontinued]) &AS04
     gestaltSCCWriteAddr
     Returns the address of SCC write ports.

     #define gestaltSCCWriteAddr 'sccw' /* SCC write ports address */

scr# (System [6.0.4])
     gestaltScriptCount
     Returns the number of script systems currently active.

     #define gestaltScriptCount 'scr#' /* number of active scripts */

scra (Macintosh Easy Open cp [1.0]) &AD03
     gestaltScrapMgrAttr
     Returns information about the Scrap Manager.

     enum {
     #define gestaltScrapMgrAttr 'scra'; /* Scrap Mgr attributes */
     gestaltScrapMgrTranslationAware = 0};

scri (System [6.0.4])
     gestaltScriptMgrVersion
     Returns the version number of the Script Manager as BCD.

     #define gestaltScriptMgrVersion 'scri' /* Script Mgr version */

     ======================================================================
     Version numbers for the Script Manager
     ======================================================================
     System Version       Script Mgr           Script Mgr          Version
                          (older ROMs)+        (newer ROMs)        format
     ----------------------------------------------------------------------
     6.0.3 and earlier    <= 0x20F             N.A.                binary
     6.0.4 Roman          0x211                0x215                  "
     6.0.4 non-Roman      0x212                0x216                  "
     6.0.5                0x213                0x217 (=2.23)          "

     6.0.7                0x230                0x231                BCD
     J-6.0.7.1            0x230                0x231                 "
     6.0.8                0x230                0x231                 "
     6.1 non-Roman        0x240                0x241                 "
     7.0                  0x700                0x700                 "
     7.0.1 Roman          0x701                0x701                 "
     7.0.1 non-Roman      0x701                0x701                 "
     7.1                  0x710                0x710                 "
     7.5                  0x720                0x720                 "
     7.5.1                0x750                0x750                 "

     + Plus,SE,II,IIx,IIcx,SE/30,Classic
     ----------------------------------------------------------------------
     (Original source: Inside Macintosh Text, p. 6-9;
      Info on System 7.5 and later based on observations.)

scsi (System [7.1.2?])
     (SCSI Manager ext [4.3])
     gestaltSCSI &AT07
     Returns information about the SCSI Manager.

     enum {
     #define gestaltSCSI 'scsi' /* SCSI Manager attributes */
     gestaltAsyncSCSI      = 0,  /* Supports asynchronous SCSI */
     gestaltAsyncSCSIINROM = 1,  /* Async SCSI is in ROM (available for */
                                 /*  booting) */
     gestaltSCSISlotBoot   = 2}; /* ROM supports Slot-style PRAM for */
                                 /*  SCSI boots */
sdev (Control Strip cp [1.0])
     gestaltControlStripAttr
     Returns information about the Control Strip software.

     enum {
     #define gestaltControlStripAttr 'sdev'
     gestaltControlStripExists       = 0, /* TRUE = control strip is */
                                          /*   installed */
     gestaltControlStripVersionFixed = 1, /* version of Control Strip */
                                          /*  installs 'csvr' selector */
                                          /*  instead of 'sdvr' &AS11 */
     gestaltControlStripUserFont     = 2, /* supports user-selectable */
                                          /*  font/size &AS20 */
     gestaltControlStripUserHotKey   = 3};/* support user-selectable hot */
                                          /*  key to show/hide the */
                                          /*  window &AS20 */

     NOTE:
     A file 'IsControlStrip.c' included with the Apple Guide Authoring Kit
     defines this selector as:
       #define gestaltStatusBarAttr 'sdev'
       #define gestaltStatusBarExists 0
     (Rene Ros)

sdvr (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltSDPStandardDirectoryVersion
     Returns the SDP Standard Directory version as INTEGER. Returns zero if
     not present and available.

     #define gestaltSDPStandardDirectoryVersion 'sdvr'
                                       /* SDP Standard Directory version */

     WARNING:
     The same selector code is used by the Control Strip 1.0 control panel.
     See the gestaltControlStripVersion ('csvr') selector entry above.

ser  (System [6.0.8?])
     gestaltSerialAttr
     Returns information about the serial hardware of the machine.

     enum {
     #define gestaltSerialAttr 'ser ' /* serial hardware attributes */
     gestaltGPIaToDCDa  = 0,
     gestaltGPIaToRTxCa = 1,
     gestaltGPIaToDCDb  = 2};

slmp (Shared Library Manager? ext [2.0])
     gestaltASLMPPC &AS17

     NOTE:
     See the gestaltASLM68K ('aslm') entry for more information.

slot (System [6.0.4, 6.0.5, discontinued])
     gestaltSlotAttr
     Returns information about the Slot Manager.

     enum {
     #define gestaltSlotAttr 'slot' /* Slot Mgr attributes */
     gestaltSlotMgrExists       = 0,
     gestaltNuBusPresent        = 1,
     gestaltSESlotPresent       = 2,
     gestaltSE30SlotPresent     = 3,
     gestaltPortableSlotPresent = 4};

slt1 (System [6.0.4, 6.0.5, discontinued])
     gestaltFirstSlotNumber
     Returns first slot number.

     #define gestaltFirstSlotNumber 'slt1' /* First Slot number */

sltc (System [6.0.8?])
     gestaltNuBusConnectors
     Returns information about the NuBus slot connector locations. The
     value returned is a bitmap. If bits 9 to E are set, there are six
     slots present with locations 9 to E.

     #define gestaltNuBusConnectors 'sltc' /* NuBus connector bitmap */

     NOTE:
     This selector does not return information about the PDS slot (with
     or without NuBus adapter). Also, it is unknown if this selector also
     includes slot 0x8 which was added with the Power Macintosh 8100/110.
     (John Mancino)

snd  (System [6.0.4])
     gestaltSoundAttr
     Returns information about the sound capabilities of the machine.

     enum {
     #define gestaltSoundAttr 'snd '   /* sound attributes */
     gestaltStereoCapability    =  0,  /* can play stereo sounds */
     gestaltStereoMixing        =  1,  /* mixes channels into single */
                                       /*  signal */
     gestaltSoundReserved       =  2,  /* Sound Manager 3.1? */
     gestaltSoundIOMgrPresent   =  3,  /* new sound input routines avail.*/
     gestaltBuiltInSoundInput   =  4,  /* built-in sound input device  */
                                       /*  available */
     gestaltHasSoundInputDevice =  5,  /* some sound input device avail. */
     gestaltPlayAndRecord       =  6,  /* built-in hardware can play and */
                                       /*  record simultaneously */
                                       /*  &AS03/AS04 */
     gestalt16BitSoundIO        =  7,  /* sound hardware can play and */
                                       /*  record 16-bit samples &AS04 */
     gestaltStereoInput         =  8,  /* sound hardware can record */
                                       /*  stereo &AS04 */
     gestaltLineLevelInput      =  9,  /* sound input port requires line */
                                       /*  level &AS04 */
     gestaltSndPlayDoubleBuffer = 10,  /* play from disk available &AS04 */
     gestaltMultiChannels       = 11,  /* multiple channel support */
                                       /*  &AS03/AS04 */
     gestalt16BitAudioSupport   = 12}; /* 16 bit audio data supported */
                                       /*  &AS04 */

     NOTES:
     Bit 7 through 12 are not defined for versions of the Sound Manager
     prior to version 3.0.

     With the Enhanced Sound Manager (version 2) you have both multi-
     channel and play-from-disk capability if the Apple Sound Chip is
     available. But the gestaltSndPlayDoubleBuffer and gestaltMultiChannels
     bits are not set. Test for the gestaltHasASC bit of the
     gestaltHardwareAttr selector. &AD06/AD20
     A later Technical Note retracts this info, and says it is not safe to
     assume both functions if the gestaltHasASC bit is set with the
     gestaltHardwareAttr selector! &AT01

snhw (System [7.5])
     (Sound Manager ext [3.0])
     gestaltSoundHardware
     Returns type of hardware used for sound?

     enum {
     #define gestaltSoundHardware 'snhw' /* Sound Hardware */
     gestaltASC          = 'asc ',  /* ASC */
     gestaltAwacs?       = 'awac',  /* returned on PowerMac */
     gestaltGCAwacs?     = 'awgc',  /* returned on PM 7200, PM 8500 */
                                    /* and PM 9500 with System 7.5.2 */
     gestaltClassicSound = 'clas',  /* Classic Mac? */
     gestaltDSP          = 'dsp ',  /* DSP */
     gestaltSinger?      = 'sing',  /* returned on PB 540c */
     gestaltSinger2?     = 'sng2',  /* returned on PB 190cs & PB 5300 */
     gestaltWhitney?     = 'whit'}; /* returned on Performa 5300 */

     NOTE:
     The SoundComponents.h header file from ETO #18 lists the following
     values, possibly also return values for this selector? (Anonymous)

     kClassicSubType  'clas'      /* classic hardware, i.e. Mac Plus */
     kASCSubType      'asc '      /* Apple Sound Chip device */
     kDSPSubType      'dsp '      /* DSP device */
     kAwacsSubType    'awac'      /* Another of Will's Audio Chips device*/
     kGCAwacsSubType  'awgc'      /* Awacs audio with Grand Central DMA */
     kSingerSubType   'sing'      /* Singer (via Whitney) based sound */
     kSinger2SubType  'sng2'      /* Singer 2 (via Whitney) for Acme */

spsl (PowerTalk ext [1.0?], part of PowerTalk)
     gestaltSMPSPSendLetterVersion
     Returns the SMP SendLetter version as INTEGER. Returns zero if not
     present and available.

     #define gestaltSMPSPSendLetterVersion 'spsl' /* SMP Sendletter */
                                                  /*  version */

stdf (System [7.0])
     (Macintosh Easy Open cp [1.0?])
     gestaltStandardFileAttr
     Returns information about the Standard File Package.

     enum {
     #define gestaltStandardFileAttr 'stdf' /* Standard File attr. */
     gestaltStandardFile58               = 0, /* StandardPutFile, */
                                              /*  StandardGetFile, */
                                              /*  CustomPutFile and */
                                              /*  CustomGetFile are */
                                              /*  available. */
     gestaltStandardFileTranslationAware = 1, /* &AD03/AS04 */
     gestaltStandardFileHasColorIcons    = 2, /* &AD03/AS04/AS05 */
     gestaltStandardFileUseGenericIcons  = 3, /* force the LDEF to use  */
                                              /*  only the system */
                                              /*  generic icons &AT06 */
     gestaltStandardFileHasDynamicVolumeAllocation = 4};
                                              /* supports more than 20 */
                                              /*  volumes &AT06 */

sysa (System [7.1.2?]) &AS04
     gestaltSysArchitecture
     Returns one of the following values, indicating the type of
     architecture on which the application is currently running.

     enum {
     #define gestaltSysArchitecture 'sysa' /* System Architecture type */
     gestalt68k     = 1,
     gestaltPowerPC = 2};

sysv (System [6.0.4]) INF
     gestaltSystemVersion
     Returns the version number of the currently active System file as BCD.

     #define gestaltSystemVersion 'sysv'  /* System file version */

     NOTES:
     In addition KanjiTalk 6.0.7 (Japanese System) and other non-Roman
     versions return 0x0606. See the 'osyv' selector.
     System J-6.0.7.1 returns 0x0609

     System 6.0.8 returns 0x0607 because only the printer drivers were
     added. You can't determine if it is actually 6.0.8 in another way.

     There are some system versions (like International System 6.0.8.1 or
     7.0.1.1) which just return the normal version number, i.e. 6.0.8 and
     7.0.1.

     System 7.1.2 (for Power Macintosh) apparently returns an incorrect
     version number (0x0710) when in 68K mode with a PPC Upgrade card.
     (Rick Gansler)

     System 7.5 Update 1.0 makes this selector return 0x751. (Anonymous)
     System 7.5 Update 2.0 does NOT make this selector return 0x752.
     (Anonymous too)

     To determine the system update version, use the 'sysu' selector.

Apple System Software (T-Z)
===========================
This chapter lists selector codes of which the meaning is known and the
first character of the selector code is in the T-Z range.

tabl (System [6.0.4])
     gestaltSelectorTable?
     Returns a handle to the Gestalt selector table itself.

     #define gestaltSelectorTable? 'tabl' /* Gestalt Table address */

     WARNING:
     Although this information isn't officially confirmed, it is probably
     correct. But it is likely to go away in future systems.

     NOTE:
     The Gestalt selector table is kept in a resizable block in the system
     heap. The last item in the table is a dummy entry (INVALID), marked by
     a selector OSType(MaxLongInt). (Marco Piovanelli, he also has some
     snippet Pascal code to list all selectors)
     With System 7.5 each item in the table now contains three parts:
     the selector, an information field and a field with either a pointer
     or a value. If the information field (or only bit 0) is 1, a value is
     stored, otherwise a pointer to the gestalt function. (Eric-Paul Rebel)
     For backward compatibility this selector probably now points to a
     second table using the old format. (Rene Ros)

tbtt (System [6.0.8])
     gestaltToolboxTable
     Returns the base address of the Toolbox trap table.

     #define gestaltToolboxTable 'tbtt' /* Toolbox trap table base */

te   (System [6.0.5])
     gestaltTextEditVersion
     Returns a value that indicates which version of TextEdit is present.

     enum {
     #define gestaltTextEditVersion 'te  ' /* TextEdit version number */
     gestaltTE1 = 1,  /* TextEdit in MacIIci ROM */
     gestaltTE2 = 2,  /* TextEdit with 6.0.4 Script Systems on MacIIci */
                      /*  (Script bug fixes for MacIIci) */
     gestaltTE3 = 3,  /* TextEdit with 6.0.4 Script Systems all but */
                      /*  MacIIci */
     gestaltTE4 = 4,  /* TextEdit in System 7.0 */
     gestaltTE5 = 5,  /* TextWidthHook available in TextEdit */
     gestaltTE6 = 6}; /* TextEdit in System 8.0 &AS20 */

     ======================================================================
     Version numbers for TextEdit
     ======================================================================
     Returned value       New Features           System software   Hardware
     ----------------------------------------------------------------------
     gestaltUndefSelector Multistyled TE         before 6.0.4      all
     gestaltTE1                                  6.0.4 Roman       IIci
     gestaltTE2           New width              6.0.4 non-Roman   IIci
                          measurement hook
                          Script Mgr compatible
     gestaltTE3                                  6.0.4 non-Roman   non-IIci
     gestaltTE4           TEFeatureFlag          6.0.5             all
     gestaltTE5           Text width             7.0               all
                          measurement hook
     gestaltTE6           ???                    8.0               all?
     ----------------------------------------------------------------------
     (Original source: Inside Macintosh Text, p.2-23)

     NOTE:
     The inline input features (also in TextEdit version 5) are also
     available with System 6.0.7 using non-Roman script systems, but there
     is no Gestalt constant that indicates this availability. &AD19

teat (Macintosh Drag and Drop ext [1.0])
     gestaltTEAttr &AD05
     Returns information about the functions and capabilities of TextEdit.

     enum {
     gestaltTEAttr 'teat' /* TextEdit attributes */
     gestaltTEHasGetHiliteRgn     = 0,  /* TEGetHiliteRgn present */
     gestaltTESupportsInlineInput = 1,  /* TextEdit does Inline Input */
                                        /*  &AS20 */
     gestaltTESupportsTextObjects = 2}; /* TextEdit does Text Objects */
                                        /*  &AS20 */

tele (System [7.5])
     (Telephone Manager Extension ext [2.0?], part of Apple Telecom)
     gestaltTelephoneMgrAttr?
     Returns information about the Telephone Mgr.

     enum {
     #define gestaltTeleMgrAttr 'tele'
     gestaltTeleMgrPresent          = 0,
     gestaltTeleMgrPowerPCSupport   = 1,
     /* below installed by Telephone Mgr 2.0? &AD21 */
     gestaltTeleMgrSoundStreams     = 2,
     gestaltTeleMgrAutoAnswer       = 3,
     gestaltTeleMgrIndHandset       = 4,
     gestaltTeleMgrSilenceDetect    = 5,
     gestaltTeleMgrNewTELNewSupport = 6};

term (System [7.1])
     gestaltTermMgrAttr
     Returns information about the Terminal Manager.

     enum {
     #define gestaltTermMgrAttr 'term' /* Terminal Mgr attributes */
     gestaltTermMgrPresent     = 0,  /* Terminal Mgr is present */
     gestaltTermMgrErrorString = 2}; /* &AS04 */

thds (Thread Manager ext [1.1]) &AD04
     (QuickDraw GX ext [1.0?])
     (System [7.1.2?])
     gestaltThreadAttr
     Returns information about the Thread Manager.

     enum {
     #define gestaltThreadAttr 'thds'   /* Thread Manager attributes */
     gestaltThreadsPresent        = 0,  /* bit true if Threads present */
     gestaltSpecificMatchSupport  = 1,  /* bit true if 'exact match' API */
                                        /* supported */
     gestaltThreadsLibraryPresent = 2,  /* bit true if ThreadsLib is */
                                        /* present */
     gestaltSchedulerFix?         = 3,    /* preemptive scheduler fix */
                                        /* present? */
     gestalt???                   = 4}; /* unknown, System 7.5.1 */

     NOTES:
     IM OS Utilities lists this selector as 'gestaltThreadMgrAttr'.

     For unknown reasons, the gestaltThreadsLibraryPresent bit is not set when
     running under PPC-native mode, on KanjiTalk (Japanese) System 7.5.
     (Laurent Humbert)

tmgr (System [6.0.4])
     gestaltTimeMgrVersion
     Returns a value that indicates the version of the Time Manager.

     enum {
     #define gestaltTimeMgrVersion 'tmgr' /* Time Mgr version */
     gestaltStandardTimeMgr = 1,  /* Standard Time Mgr */
     gestaltRevisedTimeMgr  = 2,  /* Revised Time Mgr */
     gestaltExtendedTimeMgr = 3}; /* Extended Time Mgr */

tpad (System? [7.5?] on PowerBook 520/540?)
     Indicates precense of a trackpad? As such used in the 'IsTrackPad.c'
     file included with the Apple Guide Authoring Kit.

tsma (System? [???])
     gestaltTSMgrAttr &AS14
     Returns information about the Text Services Manager.

     enum {
     #define gestaltTSMgrAttr 'tsma' /* Text Services Mgr attributes */
     gestaltTSMDisplayMgrAwareBit = 0;  /* TSM knows about Display Mgr */
     gestaltTSMdoesTSMTEBit       = 1}; /* TSM has integrated TSMTE &AS20 */

tsmv (System [7.1])
     gestaltTSMgrVersion &AT05
     Returns Text Services Manager version in BCD.

     enum {
     #define gestaltTSMgrVersion 'tsmv' /*Text Services Mgr version */
     gestaltTSMgr2 = 0x200}; /* &AS20 */

tv   (System? [???])
     (Video Startup ext [1.0], part of European Video Installer)
     gestaltTVAttr &AS14
     Returns information about the TV capabilities?

     enum {
     #define gestaltTVAttr 'tv  ' /* TV Version [huh? ed.] */
     gestaltHasTVTuner            = 0,  /* supports Philips FL1236F */
                                        /*  video tuner */
     gestaltHasSoundFader         = 1,  /* supports Philips TEA6330 */
                                        /*  Sound Fader chip */
     gestaltHasHWClosedCaptioning = 2,  /* supports Philips SAA5252 */
                                        /*  Closed Captioning */
     gestaltHasIRRemote           = 3,  /* supports CyclopsII Infra Red */
                                        /*  Remote Control */
     gestaltHasVidDecoderScaler   = 4,  /* supports Philips SAA7194 */
                                        /*  Video Decoder/Scaler */
     gestaltHasStereoDecoder      = 5}; /* supports Sony SBX1637A-01 */
                                        /*  stereo decoder */

     NOTE:
     A Power Macintosh 6100/66 with AV card and System 7.5.1 had both bit
     3 and 4 set. A Quadra 605, LC475, PM 6100/60, Performa 5200 (all with
     System 7.5.x) only had bit 3 set. Where is the remote control, then?
     Selector not installed on Quadra 700 and PB Duo 210 (also System
     7.5.1 & 7.5upd2). (John Tsombakos, Rene Ros)
     An LC630 didn't had bit 5 set, while it is supposed to have a stereo
     decoder. (Eric-Paul Rebel)

ufox (Foreign File Access ext [4.0], part of Apple CD-ROM Software) &AT03
     gestaltForeignFileAccessVersion?
     Returns Foreign File Access version in BCD.

     #define gestaltForeignFileAccessVersion? 'ufox';
                                          /* Foreign File Access version */

     NOTE: The returned version is obtained from 'vers' resource ID# 1.

vers (System [6.0.4])
     gestaltVersion
     Returns the version of Gestalt as INTEGER.

     enum {
     #define gestaltVersion 'vers'     /* Gestalt version */
     gestaltValueImplementedVers = 5}; /* Version implementing */
                                       /*  GestaltValue &AD21 */

     NOTE:
     Usually version 1 is present. On machines with ROM version 1917
     (Quadra 840AV, PowerMacs etc.) version 4 is present.
     Version 5 is installed by System 7.5 adding support for the
     GestaltValue calls. And version 6 is installed by System 7.5.1.
     (Rene Ros, Anonymous)

via1 (System [6.0.4, discontinued])
     gestaltVIA1Addr
     Returns the address of VIA 1.

     #define gestaltVIA1Addr 'via1' /* VIA 1 address */

     NOTE:
     At least on a Performa 450 (LC III) this selector and 'via2' exists for
     a short moment, until they are removed (by the system?).
     (Anthony DeRobertis)

via2 (System [6.0.4, discontinued])
     gestaltVIA2Addr
     Returns the address of VIA 2.

     #define gestaltVIA2Addr 'via2' /* VIA 2 address */

     NOTE:
     At least on a Performa 450 (LC III) this selector and 'via1' exists for
     a short moment, until they are removed (by the system?).
     (Anthony DeRobertis)

vm   (System [6.0.4])
     gestaltVMAttr
     Returns information about virtual memory.

     enum {
     #define gestaltVMAttr 'vm  '
     gestaltVMPresent      = 0,  /* set; virtual memory present */
     gestaltVMNotInstalled = 0}; /* clear; virtual memory not present */

     NOTE:
     Starting with Copland (System 8?) VM is always on but this selector
     will tell VM is off. A future selector allows to test if the
     microkernel is running and thus if VM is actually used. &AD10/AD22

wind (System [Copland?])
     gestaltWindowMgrAttr &AD21
     Returns information about the Window Manager.

     enum {
     #define gestaltWindowMgrAttr  'wind'
     kSystemEightWindowMgr      = 0,
     kSystemEightWindowsVersion = 8,
     kLatestWindowsVersion      = 8};

     WARNING:
     From the Preliminary Copland Headers. May change in the future.

     NOTE:
     The constants indicate Copland may be called System 8. Also, is
     it 'Window Manager' or 'WindowS Manager'? :-) (Rene Ros)

wma. (System [7.0])
     (Responder ext [2.0?])
     gestaltResponderAttr
     Returns information about the Workstation Management Agent a.k.a.
     Responder.

     enum {
     #define gestaltResponderAttr 'wma.' /* Responder attributes */
     gestaltResponderPresent = 0}; /* Responder is present */

xlat (Macintosh Easy Open cp [1.0]) &AD03
     gestaltTranslationAttr
     Returns information about the Translation Manager.

     enum {
     #define gestaltTranslationAttr 'xlat' /* Translation Mgr attrib. */
     gestaltTranslationMgrExists       = 0,  /* TM present */
     gestaltTranslationMgrHintOrder    = 1,  /* TRUE if hint order */
                                             /*  reversal bug is fixed */
     gestaltTranslationPPCAvail        = 2,  /* PPC Lib. available */
     gestaltTranslationGetPathAPIAvail = 3,  /* GetFileTranslationPath & */
                                             /*  GetPathTranslationDialog*/
                                             /*  available */
     gestalt???                        = 4}; /* by MEO 1.1 and later */

xttt (System [6.0.8])
     gestaltExtToolboxTable
     Returns the base address of the second half of the Toolbox trap table
     if the table is discontiguous. If the table is contiguous, this
     selector returns zero. &AD19

     #define gestaltExtToolboxTable 'xttt' /* Extended Toolbox trap table*/

     NOTE:
     This selector may be installed but returns gestaltUnknownErr instead
     of zero when the table is contiguous? (Rene Ros)

Apple Additional Software
=========================
This chapter lists selector codes of which the meaning is known and are
installed by additional, non-system software, software from Apple.

q3v  (QuickDraw 3D ext? [1.0.2])
     gestaltQD3DVersion &AD30
     Returns the version of QuickDraw 3D as a Double BCD.

     #define gestaltQD3DVersion 'q3v '

     NOTE:
     Selector was not defined with documentation, but version 1.0.3 was
     seen to install this selector with a response value similair to
     its version.

arb  (Serial Port Arbitrator ext [1.0], part of Apple Remote Access)
     gestaltArbitorAttr &AD02
     Returns information about the Serial Port Arbitration.

     enum {
     #define gestaltArbitorAttr 'arb '    /* Serial Port Arbitration */
                                          /*  attributes */
     gestaltSerialArbitrationExists = 0}; /* Serial Port Arbitration */
                                          /*  installed */

calb (OpenDoc? [???])
     gestaltCALibVersion
     Returns the version of the CA Library as BCD?

     #define gestaltCALibVersion 'calb';
     #define CALIB_VERSION_1 ((short)0x0100)

cltn (QuickDraw GX [1.0])
     gestaltCollectionMgrVersion
     Returns the version of the Collection Manager as NumVersion.

     #define gestaltCollectionMgrVersion 'cltn' /* Collection Mgr version*/

     NOTE:
     The Collection Manager is a set of routines for maintaining tagged
     collections of data; GX uses it to support the "tags" that you can
     attach to GX objects, for holding special data, including
     user-defined data. (Lawrence D'Oliveiro)

gc24 (8*24 GC cp [???])
     gestaltGC24? &M07
     Returns the version of the 8*24 GC software for the Macintosh
     Display Card 8*24 GC as BCD?

     #define gestaltGC24? 'gc24'

     NOTE:
     This selector is also installed when no card is available. A value
     returned when no card is installed is 0xFFFF D8EB.

gfxa (QuickDraw GX [1.0])
     gestaltGraphicsAttr
     Returns information about the Graphics.

     enum {
     #define gestaltGraphicsAttr 'gfxa' /* graphics attributes bits  */
     gestaltGraphicsIsDebugging = 0x0001,
     gestaltGraphicsIsLoaded    = 0x0002,
     gestaltGraphicsIsPowerPC   = 0x0004};

     NOTE: Not bit values but bit masks? Use AND?

grfx (QuickDraw GX ext [1.0])
     gestaltGraphicsVersion
     Returns the version of the Graphics as ???.

     enum {
     #define gestaltGraphicsVersion 'grfx' /* Gestalt version selector */
     gestaltCurrentGraphicsVersion = 0x00010000}; /* supposed value */
                                                  /*  returned */

kids (At Ease [1.0])
     kAtEaseGestalt
     Returns a handle to a structure holding information about At Ease.

     The following code was published by Apple &AT06:

     #define kAtEaseGestalt    'kids'
     typedef struct {
       short  giVersion;         /* structure version */
       short  giIsActive;        /* true if at ease is currently running */
       short  giAutoCreateAlias; /* if true then auto create alias */
       short  giRequestFloppy;   /* if true then request floppy on new
                                    saves */
       short  giStacksAreApps;   /* if true then HyperCard stacks are shown
                                    with applications */
       FSSpec giItemsLocation;   /* location of the At Ease Items folder */
       {more version 2 fields???}
     } GestaltRec, *GestaltRecPtr, **GestaltRecHand;

mess (QuickDraw GX [1.0])
     gestaltMessageMgrVersion
     Returns the version of the Message Manager as ???.

     #define gestaltMessageMgrVersion 'mess' /* Message Mgr version */

     NOTE:
     The Message Manager is an implementation of object-oriented-style
     message passing within an inheritance hierarchy, that can be used from
     non-OO languages.
     It is used by the GX printing system, to allow the customization of
     printing behaviour by letting applications (and developers of printing
     extensions) intercept messages sent to the printer driver.
     (Lawrence D'Oliveiro)

mtlk (QuickTime Conferencing ext? [1.0?])
     gestaltQuickTimeConferencing
     Returns the version of QuickTime Conferencing as NumVersion.

     #define gestaltQuickTimeConferencing 'mtlk'

mtv2 (Video Player app [???])
     (Video Startup ext [1.0], part of European Video Installer)
     gestaltTV &AD16
     "Indicates whether the Video Player app is present."

otan (??? [???])
     gestaltOpenTpt &AS18
     Returns information about the Open Transport software.

     enum {
     #define gestaltOpenTpt 'otan'
     gestaltOpenTptPresent          = 0x00000001,
     gestaltOpenTptLoaded           = 0x00000002,
     gestaltOpenTptAppleTalkPresent = 0x00000004,
     gestaltOpenTptAppleTalkLoaded  = 0x00000008,
     gestaltOpenTptTCPPresent       = 0x00000010,
     gestaltOpenTptTCPLoaded        = 0x00000020,
     gestaltOpenTptNetwarePresent   = 0x00000040,
     gestaltOpenTptNetwareLoaded    = 0x00000080};

     NOTE:
     Contrary to the 'ot  ' selector this one is really installed by
     Open Transport.

pmgr (QuickDraw GX [1.0])
     gestaltGXPrintingMgrVersion
     Returns the version of the QuickDraw GX Printing Manager as ???.

     #define gestaltGXPrintingMgrVersion 'pmgr' /* QD GX Printing Mgr */
                                                /*  version */

     NOTE:
     The QuickDraw GX documentation lists this selector incorrectly as
     'gestaltPrintingMgrVersion'. (Ken Prehoda)

q3vc (QuickDraw 3D ??? [???])
     gestaltQD3DViewer
     Returns information about the QuickDraw 3D Viewer.

     enum {
     #define gestaltQD3DViewer 'q3vc'
     gestaltQD3DViewerNotPresent = 0,
     gestaltQD3DViewerAvailable  = 1};

qd3d (QuickDraw 3D ext? [1.0?])
     gestaltQD3D
     Returns if QuickDraw 3D is installed or not (no attribute bits?).

     enum {
     #define gestaltQD3D 'qd3d'
     gestaltQD3DNotPresent = 0,
     gestaltQD3DAvailable = 1};

     WARNING:
     Info from QuickDraw 3D Alpha 2 headers, may change before going
     final! (Anonymous)

     NOTE:
     Is there a bug with the selector function for QD 3D 1.0b1c5? Whenever
     the 'qd3d' selector is used on a PM 6100/66 (System 7.5.1) crashes
     with a 'PowerPC illegal instruction'. This is when using the Gestalt
     dcmd in Macsbug or any of the Gestalt utilities.
     (found by John Mancino and Rene Ros)

qdgx (QuickDraw GX [1.0])
     gestaltGXVersion
     Returns the version of QuickDraw GX as ???.

     #define gestaltGXVersion 'qdgx' /* QuickDraw GX version */

     NOTE:
     Both the values 0x0100 8000 and 0x0001 0001 were observed.

srta (Speech Recognition ext [1.2.1?])
     gestaltSpeechRecognitionAttr
     Returns information about the Speech Recognition software.

     enum {
     #define gestaltSpeechRecognitionAttr 'srta'
     gestaltDesktopSpeechRecognition   = 0,      /* Recognition using mic. */
     gestaltTelephoneSpeechRecognition = 1};     /* FUTURE */

     NOTE:
     The Speech Recognition (1.2.1) only works on AV and PPC Macs, but the
     selector is installed on all machines and the response value will
     indicate the speech recognition is available. (Rene Ros)

srtb (Speech Recognition ext [1.2.1?])
     gestaltSpeechRecognitionVersion
     Returns the version of the Speech Recognition software as BCD.

     #define gestaltSpeechRecognitionVersion 'srtb'

     NOTE:
     The Speech Recognition (1.2.1) only works on AV and PPC Macs, but the
     selector is installed on all machines and its presence will indicate
     the speech recognition is available. (Rene Ros)

strm (Remote Access Aliases [1.0], part of Apple Remote Access)
     gestaltRemoteAccessAttr &AD02

     enum {
     #define gestaltRemoteAccessAttr 'strm' /* Remote Access attributes */
     gestaltRemoteAccessExists   = 0,  /* ARA Connection Interface is */
                                       /*  available */
     gestaltRemoteAccessCallOnly = 1,  /* checks for ARA client &AD15 */
     gestaltRemoteAccessMPServer = 2,  /* checks for ARA multi-port */
                                       /*  server &AD15 */
     gestaltRemoteAccessVers2    = 3}; /* checks for ARA 2.0 features */
                                       /*  &AD15 */

tmTE (Inline Extension ext [1.0], part of KanjiTalk7)
     gestaltTSMTEAttr &AS07
     Returns information about the Text Services Manager for TextEdit.

     enum {
     #define gestaltTSMTEAttr 'tmTE' /* TSM for TE attributes */
     gestaltTSMTEPresent = 0,                   /* TSM for TE is present */
     gestaltTSMTE        = gestaltTSMTEPresent};/* old name */

tmTV (Inline Extension ext [1.0], part of KanjiTalk7)
     gestaltTSMTEVersion &AS07
     Returns the version of the Text Services Manager for TextEdit as BCD.

     enum {
     #define gestaltTSMTEVersion 'tmTV' /* TSM for TE version */
     gestaltTSMTE1 = 0x100,  /* TSM for TE version 1.0 */
     gestaltTSMTE2 = 0x200}; /* TSM for TE version 2.0 &AS20 */

ttsc (Text-To-Speech Manager ext [1.0?])
     gestaltSpeechAttr
     Returns information about the Speech Manager.

     enum {
     #define gestaltSpeechAttr 'ttsc' /* Text-To-Speech Manager attrib. */
     gestaltSpeechMgrPresent = 0,  /* bit true if Speech Mgr present */
     gestaltSpeechHasPPCGlue = 1}; /* Speech Mgr has native PPC glue */

     NOTE:
     With System 7.5.1 on a PowerBook Duo 210 this selector had both
     bits set indicating the PPC Glue is available, while it is not.
     (Rene Ros)

unic (System [Copland?])
     gestaltUnicodeFeatures &AD21
     Returns information about Unicode.

     enum {
     #define gestaltUnicodeFeatures 'unic'
     gestaltUnicodeConverterPresent = 0,
     gestaltUnicodeConverterMask = 1L << gestaltUnicodeConverterPresent};

     WARNING:
     From the Preliminary Copland Headers. May change in the future.

ws 1 (WorldScript I ext [7.1?])
     gestaltWorldScriptIVersion?
     Returns version of WorldScript I software as BCD.

     #define gestaltWorldScriptIVersion? 'ws 1'

XTND (??? [???])
     gestaltXTNDAttr &AS10
     Returns information about XTND Manager?

     enum {
     #define gestaltXTNDAttr 'XTND'
     gestaltPPCXTNDPresent = 1};

     NOTE:
     Is used in some code to check if XTND engine is present. However it is
     unknown when it is installed, so supposedly it is meant for future
     use. Like a built-in XTND engine in the System Software? When the
     selector is installed all operations are dispatched through trap
     _XTNDMgr (0xABF4) otherwise the library provides the code.
     (Marco Piovanelli)

Third Parties Software
======================
This chapter lists selector codes of which the meaning is known and are
installed by Third Parties software.

!SYM (Symbionts ext [1.0] by B. Kevin Hardman)
     gestaltSymbiontsTable
     Returns a pointer to a structure containing the size of the System
     Heap before and after loading the INITs.

     #define gestaltSymbiontsTable '!SYM' /* Symbionts address */

ADfd (AfterDark [2.0?] by Berkeley Systems, Inc.)
     gestaltAfterDarkFolder &M05
     Returns a pointer to a procedure that gives the DirID and vRefNum of
     the 'After Dark Files' folder.

     #define gestaltAfterDarkFolder 'ADfd'

     NOTE:
     See for more information the AfterDark Gestalt header file. It
     is available by sending email to
     [e-mail] using the command
     'archive get src/AfterDarkGestalt.h'
     Or by emailing to Berkeley Systems Mac Tech Support at
     [e-mail] and ask them for the AfterDarkGestalt.h file.

ADrk (AfterDark [2.0] by Berkeley Systems, Inc.)
     gestaltAfterDarkAttr &M05
     Returns a longword bitmask containing public information about
     After Dark.

     enum {
     gestaltAfterDarkAttr = 'ADrk'; /* After Dark states */
     eSystemIQActive      = 0,  /* SystemIQ activity monitor active */
     eSoundActive         = 1,  /* AD has allocated a sound channel */
     eADAcquiringPassword = 2}; /* After Dark has its password dialog up */

     NOTE:
     See for more information the AfterDark Gestalt header file. It
     is available by sending email to
     [e-mail] using the command
     'archive get src/AfterDarkGestalt.h'
     Or by emailing to Berkeley Systems Mac Tech Support at
     [e-mail] and ask them for the AfterDarkGestalt.h file.

AlaC (A La Carte ext [1.1?] by Denali Software Development)
     gestaltALaCarte?
     Returns the address of the A La Carte INIT global data. The structure
     of the data is proprietary.  The existence of the 'AlaC' selector
     indicates that the A La Carte INIT is loaded.

     #define gestaltALaCarte? 'AlaC'

ApoL (Apollo ext [1.0] by Jeremy Roussak)
     gestaltApolloTable
     Returns a handle to an instance of a structure.

     #define gestaltApolloTable 'ApoL' /* Apollo address */

     NOTE:
     See for more information the Programmers' Information chapter in the
     Apollo documentation. (Jeremy Roussak)

ASHI (Arashi app [???] by Juri Munkki)
     ???
     Returns information about the presence of Arashi by returning one (1)
     if loaded, and zero (0) when removed.

AuBu (AutoBuild ext [1.0] by Rene G.A. Ros)
     gestaltAutoBuildVersion
     Returns the version of AutoBuild as NumVersion.

     #define gestaltAutoBuildVersion 'AuBu' /* AutoBuild version */

     NOTE: The returned version is obtained from 'vers' resource ID# 1.

BBlk (Basic Black cp [1.3], by Mason L. Bliss)
     gestaltBasicBlackAddr
     Returns the address of Basic Black's patch globals.

     #define gestaltBasicBlackAddr 'BBlk' /* Basic Black address */

     NOTE:
     See documentation included with Basic Black for more information.

BIFF (QM Biff ext [1.0] by Patrick C. Beard)
     ???
     Determines if there is mail (QuickMail). The response long word is 1
     if you have mail, and 0 if you don't.

Cafe (Coffee Break appl [1.0] by Thomas Reed)
     gestaltCoffeeBreakAddr?
     Returns a pointer to a code resource owned by Coffee Break.
     Details are private.

     #define gestaltCoffeeBreakAddr? 'Cafe'

CHSR (ChooserUser cp [1.0b4] by Flux Software)
     Returned response is private.

CKI3 (AETracker cp [3.0] by C.K. Haun)
     kAETrackerGestalt
     This selector returns a pointer to the external interface routine for
     AETracker, details of which are in the AETracker interface guide.
     (C.K. Haun)

     #define kAETrackerGestalt 'CKI3' /* AETracker address */

CsWT (Desktop Strip cp [1.0b1] by Sigurdur Asgeirsson)
     gestaltDesktopStripAttr?
     Returns information about the installed Desktop Strip software.

     enum {
     #define gestaltDesktopStripAttr? 'CsWT'
     gestaltDesktopStripPresent? = 0};

dBgP (DBugR cp [1.0?] by Alessandro Levi Montalcini)
     ???
     Returns a pointer to a data structure with the preferences,
     identical to the data in the PREF resource, for which a template
     is included.

     NOTE: The d is actually the option-d character (0xB6).

EagL (Eagle ext [1.4], part of Apollo 1.1 by Jeremy Roussak)
     gestaltEagleAttr?
     Returns information about the state of the Eagle background
     application.

     enum {
     #define gestaltEagleAttr? 'EagL' /* Eagle attributes */
     gestaltEaglePPCReady? = 0}; /* Eagle can accept next PPC */

FPUE (SoftwareFPU cp [3.0?] by John Neil & Associates) &M06
     gestaltSoftwareFPUAddr?
     Detects presence of SoftwareFPU.
     If the result of the Gestalt call is noErr, then SoftwareFPU is
     installed, and the 68881 FPU reported by the gestaltFPUType selector
     is an emulated FPU. The value returned in the response is private and
     should be ignored.

     #define gestaltSoftwareFPUAddr? 'FPUE'

FrcP (Decor cp [1.0] by Francois Pottier)
     gestaltDecorAddr
     Returns a pointer to a structure which can be read or changed, and
     enables programmers to change the picture on the desktop.

     #define gestaltDecorAddr 'FrcP' /* Decor address */

     NOTES:
     See for more information on how to use this structure the
     documentation included with Decor 1.0 or later.

     The c is actually the option-c character (0x8D).

Frs1 (MegaDial cp [1.0] by Cypress Research)
     gestaltMegaDialAttr?
     Returns private information about MegaDial.

     #define gestaltMegaDialAttr? 'Frs1'

FrsH (MegaDial cp [1.0] by Cypress Research)
     gestaltMegaDialAddr?
     Returns a pointer to a private function.

     #define gestaltMegaDialAddr? 'FrsH'

FWRT (FullWrite app [2.0] by Akimbo Systems)
     gestaltFullWriteInfo
     Returns a handle to a FullWrite callbacks data structure when
     FullWrite is currently running. If it is not running 0 (zero) is
     returned.

     #define gestaltFullWriteInfo 'FWRT'

     NOTE:
     See for more information the FullWrite Extension SDK (For more
     information contact Akimbo Systems by email at [e-mail])

Gast (Gestalt! appl [2.9.2] by Roland Mansson)
     gestaltGestaltVersion
     Returns the version of the application as NumVersion.
     GestaltValue is removed when application quits. Just for fun.
     (Roland Mansson)

     #define gestaltGestaltVersion 'Gast' /* Gestalt! version */

     NOTE: The a is actually the option-u/a character (0x8A).

GTLK (GestaltTalk code by Brigham Stevens, Apple Computer DTS)
     ???
     Snippet code, see documentation.

GWat (GestaltWatch ext [1.0] by Scot Bronson)
     ???
     Returns pointer to structure where collected information is stored.

     NOTE: In development, not yet available.

ICTE (ICeTEe ext [1.1], part of Internet Config
                        by Quinn "The Eskimo!" and Peter N. Lewis)
     gestaltInternetConfigTEAddr?
     Returns the address of a record which is documented in the
     IC Programmer's Kit.

     #define gestaltInternetConfigTEAddr? 'ICTE'

idle (IdleTime INIT [1.0] by UserLand Software)
     gestaltIdleTime?
     Returns the number of clock ticks since the last keystroke, disk
     insertion,  mouse movement or mouse click.

     #define gestaltIdleTime? 'idle'

IF 8 (Speak Note cp [???] by Glenn R. Howes)
     gestaltSpeechNoteAttr?
     Returns information about the installed copy of Speak Note.

     enum {
     #define gestaltSpeechNoteAttr? 'IF 8'
     gestaltSpeechNoteAvailable = 0};

InMn (InternetMemory cp [1.0] by CircleDream Software)
     gestaltInternetMemory
     Returns information still private, until after the first release.

     #define gestaltInternetMemory 'InMn'

JMBe (Traceroute Ethernet LAP [1.0] by Jim Browne)
     gestalt???
     Returns the address of a structure as documented in the header file
     'RawIP.h' to allow application programs to perform Raw IP writes and
     filter all incoming IP packets.

     #define gestalt??? 'JMBe'

Kals (Alias Assistant cp [TrashAlias 1.0] formerly TrashAlias,
                                          by Flux Software)
     Returned response is private.

Lnch (Network Time cp [2.0] by Pete Resnick)
     (First Launch Gestalt INIT code resource, by Pete Resnick)
     gestaltFirstLaunchAttr
     Returns info on whether the _Launch trap has been called by the
     System.

     enum {
     #define gestaltFirstLaunchAttr 'Lnch' /* _Launch information */
     gestaltFirstLaunchDone = 0}; /* _Launch called, INIT time over */

     NOTE:
     Bit 0 of the response, gestaltFirstLaunchDone, indicates whether the
     _Launch trap has been called since startup of the machine. All other
     bits are reserved and currently 0. Even if not installed at INIT time,
     Network Time will install the Gestalt selector if it is not already
     there when the control panel is opened and automatically set
     bit 0 to 1.
     68000 assembler source code is available for the INIT that installs
     the selector, and INIT resource -4048 from Network Time may be
     stolen (and renumbered as desired) and used in any INIT file as
     desired. (Pete Resnick)

MFK+ (Program Switcher ext [2.0] by Michael F. Kamprath)
     Returns a pointer to private data.

MOMM (Microsoft Office Manager cp [4.2.1] part of Microsoft Office [4.2.1],
      by Microsoft Corporation)
     gestaltMSOfficeMgr
     Returns a pointer to private data.

     #define gestaltMSOfficeMgr 'MOMM'

     NOTE:
     Microsoft Office Manager is a customizable control panel allowing easy
     access to Microsoft Office apps (or any other added applications,
     files, etc), setup, and help via a new system menu. Also incorporates
     the QuickSwitch feature of Command-Tabbing through current processes.
     (Terence Worley)

NIPX (Novell MacIPX cp [1.0.1] by Novell Inc.)
     gestaltNovellIPXVersion
     Returns the version of MacIPX as NumVersion.

     #define gestaltNovellIPXVersion 'NIPX' /* MacIPX version */

     NOTE:
     If the selector returns an error (i.e. no such selector?) then MacIPX
     is not installed. If the selector returns 0 then MacIPX is installed
     but the driver is not open. Any other value is the version.
     (Duane Murphy)

NMBT (Attention cp [0.6] by Marco Piovanelli)
     gestaltAttentionAddr
     The response value returned is a pointer to a read-only parameter
     block in the system heap.

     #define gestaltAttentionAddr 'NMBT' /* Attention address */

     NOTE: See for more detailed information the included ReadMe file.

NTim (Network Time cp [2.0] by Pete Resnick)
     Returns information private to Network Time.

PNfs (FileSaver [3.0], part of Norton Utilities for Macintosh)
     Returns a private structure used by various portions of the
     Norton Utilities.

PPP  (PPP mdev [???], part of MacPPP by Merit Network, Inc. and the
      University of Michigan)
     gestalt???
     Returns the address of the Lap globals as documented in the header
     file 'ppp.h.source'. It's an absolutely enormous struct that contains
     among other things function pointers to let you open and close MacPPP.
     (Richard Buckle)

     #define gestalt??? 'PPP '

     NOTE:
     Source code of MacPPP is available at: ftp://merit.edu/pub/ppp/mac/

PWRS (PwrSwitcher cp [1.0] by David B. Lamkins)
     gestaltPwrSwitcherTable
     Returns a pointer to a private data structure (undocumented).

     #define gestaltPwrSwitcherTable 'PWRS' /* Power Switcher address */

SAVC (AfterDark cp [2.0] by Berkeley Systems, Inc.)
     (Basic Black cp [1.3.3] by Mason L. Bliss)
     (CDU cp [1.0?] by Connectix Corp.)
     (DarkSide of the Macintosh [4.0] by Tom Dowdy)
     (PixelPlay? ??? [???] by ???)
     (ScreenDaemon ??? [1.0] by Mason L. Bliss)
     (Sleeper cp [1.1.4?] by St.Clair Software)
     gestaltScreenSaverControl &M05
     Returns a pointer to a routine of type

     typedef pascal OSErr (*SaverControlProcPtr) (SaverCommand command);

     which allows controlling the screen saver.

     #define gestaltScreenSaverControl 'SAVC'

     NOTE:
     See for more information the AfterDark Gestalt header file. It
     is available by sending email to
     [e-mail] using the command
     'archive get src/AfterDarkGestalt.h'
     Or by emailing to Berkeley Systems Mac Tech Support at
     [e-mail] and ask them for the AfterDarkGestalt.h file.

SAVR (AfterDark cp [2.0] by Berkeley Systems, Inc.)
     (Arashi app [???] by Juri Munkki)
     (Basic Black cp [1.3.3] by Mason L. Bliss)
     (CDU cp [1.0?] by Connectix Corp.)
     (Coffee Break app [1.0] by Thomas Reed)
     (DarkSide of the Macintosh [4.0] by Tom Dowdy)
     (PixelPlay? ??? [???] by ???)
     (ScreenDaemon ??? [1.0] by Mason L. Bliss)
     (Sleeper cp [1.1.4?] by St.Clair Software)
     gestaltScreenSaverAttr &M05
     Returns information about the current screen saver. Defined if a
     screen saver is installed.

     enum {
     #define gestaltScreenSaverAttr 'SAVR' /* Screen saver attributes */
     gestaltSaverTurnedOn      = 0;  /* saver enabled/disabled */
     gestaltSaverAsleep        = 1;  /* saver currently asleep */
     gestaltSaverDemoMode      = 2;  /* saver sleeping in demo mode */
     gestaltSaverPasswordMode  = 3;  /* saver sleeping in password- */
                                     /*  protected mode */
     gestaltAppDrawingDisabled = 4}; /* QD drawing disallowed between */
                                     /*  module animation frames */

     NOTE:
     See for more information the AfterDark Gestalt header file. It
     is available by sending email to
     [e-mail] using the command
     'archive get src/AfterDarkGestalt.h'
     Or by emailing to Berkeley Systems Mac Tech Support at
     [e-mail] and ask them for the AfterDarkGestalt.h file.

     Thomas Reed wrote some source code (C) demonstrating how to install
     this selector. You can get a copy by sending email to
     [e-mail] using the command
     'archive get src/gestalt-savr.txt'

SCom (Super Comments cp [CommentKeeper 1.0] formerly CommentKeeper,
                                            by Flux Software)
     Returned response is private.

SDdD (Shutdown Delay cp [2.0.1] by Alessandro Levi Montalcini)
     kSDDelayCreator
     Returns a pointer to a data structure described in the documentation
     included with Shutdown Delay.

     #define kSDDelayCreator 'SDdD'

     NOTE: The d is actually the option-shift v character (0xD7).

sDmn (ScreenDaemon ext [1.0] by Mason L. Bliss)
     gestaltScreenDaemonAddr
     Returns the address of ScreenDaemon's patch globals.

     #define gestaltScreenDaemonAddr 'sDmn' /* ScreenDaemon address */

SHCM (Shared Code Manager ext [1.0] by Eric Schlegel of Microsoft Corp.)
     gestalt???
     Returns a pointer to an undocumented entrypoint into the Shared Code
     Manager.

     #define gestalt??? 'SHCM'

     NOTE:
     The Shared Code Manager (1991) is a simple DLL mechanism that is
     currently used by Microsoft's Mac OLE 1.0 (Object Linking & Embedding)
     and the applications that use OLE 1.0. (Eric Schlegel)

SKey (SmartKeys cp [OneSpace INIT] formerly OneSpace INIT,
                                   by Flux Software)
     Returned response is private.

SLip (StuffIt SpaceSaver ext [1.0?] by Aladdin Systems, Inc.)
     gestaltStuffItSpaceSaverAddr
     Returns the address of the SpaceSaver "command module" which allows
     developers to access all the functions of SpaceSaver.
     (Leonard Rosenthol)

     #define gestaltStuffItSpaceSaverAddr 'SLip'

SnLv (??? [???])
     kGestaltLevelMeter
     Defined in the SoundLevel.c source file, distributed with the
     SoundLevel sample code.

     #define kGestaltLevelMeter 'SnLv'

SPAL (SpeakAlert ext [1.0] by Brian Stern)
     gestaltSpeakAlert
     Details are private to SpeakAlert.

     #define gestaltSpeakAlert 'SPAL'

SWVE (SimpleWave ext [1.0b1] by Rene G.A. Ros)
     gestaltSimpleWaveTable
     Returns a pointer to an INITGestalt structure.

     #define gestaltSimpleWaveTable 'SWVE'

TExT (FileTyper Menu cp [none], part of FileTyper by Daniel Azuma)
     gestaltTyperMenuAttr
     Returns information about the FileTyper Menu's operation.

     enum {
     #define gestaltTyperMenuAttr 'TExT'
     gestalt??? = 0}; /* TRUE = NO item added to Finder's File menu */

     WARNING:
     No currently released version of FileTyper Menu (up to and including
     4.1.1) installs this selector, but future versions may. Check for the
     existence of this selector first, if you use it. (Daniel Azuma)

TMON (TMON Pro [3.0] by ICOM Simulations, Inc.)
     ???
     The value returned is a pointer to a Monitor information block. &M04
     (Scott Bronson)

Typ4 (FileTyper Menu cp [4.1.1], part of FileTyper by Daniel Azuma)
     gestaltTyperMenuPriv
     Returns private information, the existence of this selector indicates
     FileTyper Menu is installed.

     #define gestaltTyperMenuPriv 'Typ4'

     NOTE:
     Third parties can determine if FileTyper Menu is installed by
     checking for the existence of this selector. However, the actual value
     returned is private and subject to change. (Daniel Azuma)

UMAM (Authentication Manager cp [1.0.7] by Robert John Churchill of the
                                           University of Michigan)
     gestaltAuthManVersion
     Returns the version of the Authentication Manager as Double BCD.

     #define gestaltAuthManVersion 'UMAM'

YeHa (SpeedyFinder7 cp [1.5.4?] by Victor Tan)
     ???
     Returns a pointer to a private data structure (undocumented).

     NOTE:
     The structure to which the Gestalt selector refers changes almost
     invariably from version to version of SF7. Should someone work out
     parts of the structure of the selector keep in mind that it will
     almost certainly change in the next minor release and definitely with
     the next major release. (Victor Tan)

Unknown Codes
=============
The following sections list selector codes of which the meaning is unknown.

Unknown Codes Apple Software
----------------------------
(OSType) 7
     (System [6.0.4])
     Returns (long)'carl' and a result code of noErr.

(OSType) 13
     (System [6.0.4])
     Returns (long)'bbmc' and a result code of noErr.

3615 (Express Modem cp [1.0], part of Express Modem Software)
a pc (PC Setup? cp [1.0?], part of Quadra 610-DOS software)
admn (AppleShare Admin appl [3.0])
     gestaltASAdminAttr?

     enum {
     #define gestaltASAdminAttr? 'admn'
     gestaltASAdminPresent? = 0};

ag_e (7.0/7.1 Apple Guide Enabler ext [???] part of Apple Guide 2.0)
     gestaltAppleGuideEnablerAttr?
     Returns information about the Apple Guide Enabler?

     enum {
     #define gestaltAppleGuideEnablerAttr? 'ag_e'
     gestaltAppleGuideEnablerPresent? = 0};

AgVU (Agent VU ext [2.0?], part of Virtual User)
aint (System? [7.1.1?])

     NOTES:
     Returns 2 on a C660AV and Q840AV.

     This selector may be installed but returns gestaltUnknownErr instead
     of zero. (Rene Ros)

apml (PowerTalk Manager ext [1.0?], part of PowerTalk)
     Bit 0 and 31 set.

asps (AppleShare Print Server appl [3.0])
     gestaltASPrintServerAttr?

     enum {
     #define gestaltASPrintServerAttr? 'asps'
     gestaltASPrintServerPresent? = 0};

AtEa (At Ease Startup [2.0?], part of At Ease for Workgroups)
ATI  (??? [???])
ATR  (Type Reunion ext [1.0?] by Adobe Systems Inc.)
bART (MacCheck app [1.0])
BaRT (MacCheck app [1.0])
bast (Launcher cp [1.0?], part of System 7.0.1P and 7.1P)
batt (Powerbook Duo Enabler [1.0])
     (System [7.5])
     (System Enabler 111 [1.0])
     (System Enabler 121 [1.0])
     (System Enabler 131 [1.0])
     (System Enabler 201 [1.0]))
     Returns information about the PowerBook battery?

     The debugger name for the routine which returns the response for this
     selector is called 'GETTIMELEFT'. But in what units? And what time?
     I've only seen the value 0, 5 or 6 returned. The GDEF calls the Power
     Manager (_PMgrOp [0xA085 with D0=0x00]) to get the info but I can't
     find which function. (Rene Ros)

bclk (System [7.5.2?) INF?
     gestaltBusClockSpeed?
     Returns the bus clock speed in Hz.

     #define gestaltBusClockSpeed? 'bclk'

     NOTES:
     Only on Power Macintosh, not on 68K computers?

     See also 'pclk' in this section.

brcn (Screen? cp [1.0?] on Color Classic)
brcN (Energy Saver cp [1.0?], part of Monitor Energy Saver)
bugx (7.5.2 Printing Fix ext [1.0.2?])
     (System [7.5])
     (System Update ext [3.0])
     gestaltBugFixAttrsThree
     Returns information about the fixes applied.

     enum {
     #define gestaltBugFixAttrsThree 'bugx'
     gestalt???                      =  0,
     gestalt???                      =  1,
     gestalt???                      =  2,
     gestalt???                      =  3,
     gestalt???                      =  5,
     gestalt???                      =  7,
     gestaltDIXZeroSupportsBadBlocks =  9,  /* &AD29 */
     gestaltOTPrintingFix?           = 10}; /* OT Printing fix by */
                                            /*  7.5.2 Printing Fix ext */

     NOTE:
     The System Update reserves the 'bugx', 'bugy' and 'bugz' gestalt
     selectors to indicate which fixes are installed on a given machine.
     These are for Apple internal use only, and developers should not rely
     on these. There is no guarantee that they will be supported in future
     versions of Macintosh system software. &AT06

bugy (32-bit System Enabler [1.0])
     (Hardware System Update ext [1.0])
     (MIDI Manager ext [2.0.2?])
     (Network Launch Fix ext [1.0])
     (Sound Manager ext [3.0])
     (System? [7.1?])
     (System enabler 065)
     gestaltBugFixAttrsTwo?
     Returns information about the fixes applied.

     enum {
     #define gestaltBugFixAttrsTwo?  'bugy'
     gestaltBugsEgretDispatchPatch? =  0,  /* these correct the */
     gestaltBugsEgretTimePatch?     =  1,  /*  system clock and */
                                           /*  modem perf.? */
     gestalt???                     =  2,  /* unknown, Hardware Upd. */
     gestaltEgretTickHandlerPatch?  =  3,  /*  see bit 0 & 1 ? */
     gestalt???                     =  4,  /* unknown, Hardw. Upd. */
     gestaltSCSIPatch?              =  5,  /* floppy drive fixed ? */
     gestalt???                     =  6,  /* unknown, Hardw. Upd. */
     gestalt32bitEnabler?           =  7,  /* 32-bit enabler avail?*/
     gestalt???                     =  8,  /* unknown, MIDI Mgr */
     gestalt???                     =  9,  /* unknown, Sound Mgr 3 */
     gestalt???                     = 11,  /* unknown, Hardw. Upd. */
     gestalt???                     = 12,  /* unknown, Hardw. Upd. */
     gestalt???                     = 13,  /* unknown, Hardw. Upd. */
     gestalt???                     = 14,  /* unknown, Hardw. Upd. */
     gestalt???                     = 15,  /* unknown, Hardw. Upd. */
     gestalt???                     = 16,  /* unknown, Hardw. Upd. */
     gestaltKeyboardPatch?          = 17,  /* corrects Adjustable */
                                           /*  Kbd 'kbd ' response?*/
     gestalt???                     = 18,  /* unknown, Hardw. Upd. */
     gestalt???                     = 19,  /* unknown, ??? */
     gestalt???                     = 20,  /* unknown, ??? */
     gestalt???                     = 21,  /* unknown, ??? */
     gestalt???                     = 24,  /* unknown, ??? */
     gestalt???                     = 25,  /* unknown, ??? */
     gestalt???                     = 26,  /* unknown, ??? */
     gestaltNetworkLaunchFix?       = 27,  /* fix problem with */
                                           /*  appl. on server */
                                           /*  launch with 68040 */
     gestalt???                     = 28,  /* unknown, ??? */
     gestalt???                     = 31}; /* unknown, ??? */

     WARNING:
     These are ALL guesses. Well not entirely, I used the ResEdit CODE
     Editor to peek into the 32-bit System Enabler, Hardware System update
     and other software. Please check if I'am right. You should be able to
     find some of the answers in the INIT resource of the Hardware Update
     and the names of the PTCH resources in version 1.0 were also useful...

     NOTE:
     The System Update reserves the 'bugx', 'bugy' and 'bugz' gestalt
     selectors to indicate which fixes are installed on a given machine.
     These are for Apple internal use only, and developers should not rely
     on these. There is no guarantee that they will be supported in future
     versions of Macintosh system software. &AT06

bugz (System [7.0]/Tune-up ext)
     gestaltBugFixAttrs(One)?
     Returns information about the fixes applied.

     enum {
     #define gestaltBugFixAttrs(One)? 'bugz'
     gestaltFixPrinting             =  0,
     gestaltResponderCrashFix       =  1,
     gestaltResponderVersionFix     =  2,
     gestaltPurgeFonts              =  3,
     gestaltAliasMgrFix             =  4,
     gestaltSCSIFix                 =  5,
     gestaltKeyboardFix             =  6,
     gestaltTrueTypeFix             =  7,
     gestaltFixedMicroseconds       =  8,
     gestaltSaveLastSPExtra         =  9,
     gestaltVMCursorTaskFix         = 10,
     gestaltDietPatches             = 11,
     gestaltBackgroundPrintingPatch = 12,
     gestaltNoPreferredAlertPatch   = 13,
     gestaltAllocPtrPatch           = 14,
     gestaltEPPCConnectionTableFix  = 15,
     gestaltDAHandlerPatch          = 16,
     gestaltLaunchFix               = 17,
     gestaltDeathNoticePatches      = 18,
     gestaltBacklightFix            = 19,
     gestaltPrintDriverFix          = 20,
     gestaltPMSegmentTweaks         = 21,
     gestaltWDEFZeroFix             = 22,
     gestaltPACKSixFix              = 23,
     gestaltResolveFileIDRefFix     = 24,
     gestaltDisappearingFolderFix   = 25,
     gestaltPowerBookSerialFix      = 26,
     gestaltPowerBookSleepFix       = 27,
     gestaltPowerBookFloppyEjectFix = 28,
     gestaltPowerBookSleepFPUFix    = 29,
     gestaltPowerBookRestFPUFix     = 30,
     gestalt???                     = 31};

     NOTE:
     The System Update reserves the 'bugx', 'bugy' and 'bugz' gestalt
     selectors to indicate which fixes are installed on a given machine.
     These are for Apple internal use only, and developers should not rely
     on these. There is no guarantee that they will be supported in future
     versions of Macintosh system software. &AT06

cate (Catalogs Extension? ext [???], part of PowerTalk)
     Bit 0 set.

CDJR (Apple Menu Options cp [1.0], part of System 7.5)
     (ExtendedAppleMenu [???] by Chris Derossi)
cfmg (System [7.1.2 on PowerMac])
     (CFM68K ext [1.0a1], part of OpenDoc)
cith (System? [???])
     Seen under MAE 1.0.

clbv (PowerTalk ext [1.0?], part of PowerTalk)
     Bit 0 set.

cmic (System? [7.5.2?])
     Returns 1 on a PM 7200/90.

cnfn (??? [???])
     Checked for by the PPC Debugger Nub extension and control panel.

comp (QuickDraw Font Plus ext [???], part of the KanjiTalk 7.1)

     NOTES:
     The name "QuickDraw Font Plus" is translated from Japanese and may be
     translated differently by Apple Computer, Inc.

     I think 'comp' stands for 'composite', as the INIT contains patches to
     the Font Manager needed to handle 'composite font suitcases'.
     (Marco Piovanelli)

ctxm (???)
cuda (System? [7.1.2?], on Performa 630TV)
     gestaltCudaDispatchMgrAttr?
     Returns information about the Cuda Dispatch Manager?

     #define gestaltCudaDispatchMgrAttr? 'cuda'

     Values found: 0x0002 0025 and 0x0002 0028

CYP8 (MegaPhone Menu ext [1.0] by Cypress Research Corp.,
                               part of Apple Telecom)
ddsk (DropDisk app [1.0b3], formerly Mount'em app by Mike Wise and
                            Chris Cotton of Apple Computer)
     Only installed if DropDisk driver is loaded. Looks like the highword
     contains the version (of driver or application?) as BCD, while the
     low-word is a mystery.

     NOTE:
     See also the 'mtem' selector installed by Mount'em 1.0b1 and 1.0b2.

detc (???)
diag (Automated Diagnostics ext [1.0], part of Apple Personal
                                       Diagnostics 1.0)
doub (WorldScript II ext [7.2?], part of KanjiTalk7 and
                                 several language kits)
     gestaltDoubleByteScriptVersion?
     Returns the version of WorldScript II as BCD?

     #define gestaltDoubleByteScriptVersion? 'doub'

     NOTE:
     This selector seems to be installed by WorldScript II (the
     System 7.1 ext needed to handle double-byte scripts like Japanese,
     Korean and Traditional Chinese). Known returned value is 0x0710.
     (Marco Piovanelli)

dude (Powerbook Duo Enabler [1.0])
     (System [7.5])
     (System Enabler 111 [1.0])
     (System Enabler 121 [1.0])
     (System Enabler 131 [1.0])
     (System Enabler 201 [1.0]))
dudi (Powerbook Duo Enabler [1.0])
     (System [7.5])
     (System Enabler 111 [1.0])
     (System Enabler 121 [1.0])
     (System Enabler 131 [1.0])
     (System Enabler 201 [1.0]))
EM20 (Extensions Manager cp [2.0] by Ricardo Batista)
     gestaltExtensionsManager?
     Selector only indicates presence of the Extensions Manager software?
     (Anthony DeRobertis)

     #define gestaltExtensionsManagerExists? 'EM20'

     NOTE:
     Not installed by version 3.0 which is part of System 7.5?

fdbk (Speech Setup cp? [???], part of PlainTalk)
fdrs (Finder [7.1.1?])
     Installed by Finder extension?

fnda (Finder [7.1.1])
     NOTE: The a is actually the option-a character (0x8C).

fnd& (Finder?, System? [7.1.2 on PowerMac?])
     NOTE: The & is actually the option-shift-a character (0xE5).

fnd* (Finder [7.1.1])
     NOTE: The * is actually the shift-6 character (0xF6).

fnd? (Finder [7.1.1?])
     Installed by Finder extension?

fndc (Finder [7.1.1])
fndf (Find File Extension ext [1.1.1], part of System 7.5 Update 1.0)
     Returns the type of software extending the find capabilities of the
     Finder? If the selector isn't installed the find capabilities are
     not extended or an older version of Find File is installed?
     The response is 'fndf' if Find File is installed. (Rene Ros)

fndn (Finder?, System? [7.1.2 on PowerMac?])
     NOTE: The n is actually an option-n, n (0x96).

FNDR (Finder [7.1.1?])
     Installed by Finder extension?

fndv (Finder? [???], part of System 7.5.2)
fndx (AliasDragger ext [1.0b1] by Leonard Rosenthol)
     (ControlDragEnabler ext [1.0] by Anthonis DeRobertis)
     (Finder Enabler [1.0] by Marco Piovanelli)
     gestaltFinderFeaturesAttr?
     By installing this selector some undocumented features of the Finder
     (starting with System 7.1 Pro) are enabled.

     enum {
     #define gestaltFinderFeaturesAttr? 'fndx'
     gestaltFinderControlDrag?    = 0,  /* if set, control dragging an */
                                        /*  item creates an alias */
     gestaltFinderRevealOriginal? = 1}; /* if set, Reveal Original menu */
                                        /*  item is added */

     NOTES:
     The x is actually an option-x (0xC5).

     Apperantly the Finder team implemented several features not approved
     by the 'high command'. Under normal circumstances these features are
     not available, unless the correct bit is set with the response of
     this selector. There are probably more bits defined, or already
     obsolete because the feature got implemented with later versions of
     the Finder. (Anonymous)

     Setting bit 1 causes a new menu item to be added to the Finder's File
     menu, just below "Find Again". The new item is "Reveal Original" and
     it instantly resolves alias files! (Marco Piovanelli)

futr (ThreadsINIT ext [2.0?], part of Threads Package)
fstn (System? [7.5.2?])
     Returns 1 on a PB 5300.

gacc (System? [7.5.2?])
gFax (Fax Extension ext [1.1?], part of Express Modem Software)
gntz (System [7.1.2 on PowerMac])
gpad (General Controls cp [7.5])
     gestaltGeneralControlsAddr?
     Returns the address to the long value returned by the 'gprf'
     selector to change that value. (Jon Pugh)

     #define gestaltGeneralControlsAddr? 'gpad'

gprf (General Controls cp [7.5])
     gestaltGeneralControlsAttr?
     Returns information about the settings made in the General Controls
     control panel.

     enum {
     #define gestaltGeneralControlsAttr? 'gprf'
     gestaltControlGoDocuments?  = 0,  /* go to Documents folder */
     gestaltControlGoLast?       = 1,  /* go to last used folder */
     gestaltControlProtectSystem?= 2,  /* Protect System folder */
     gestaltControlHideDesktop?  = 3,  /* Hide desktop */
     gestaltControlLauncher?     = 4,  /* Display Launcher on startup */
     gestaltControlWarnShutdown? = 5}; /* Warn on incorrect shutdown */

HAM  (Apple Menu Options cp [1.0], part of System 7.5)
     (HAM ??? [???] by Inline Design)
harp (PowerBook cp? [7.2?])
hcsl (Finder [7.1.1?])
heap (System [7.1.2 on PowerMac])
     Bits 1 and 5 set.

hgfd (AppleShare File Server appl [3.0])
     gestaltASFileServerAttr?

     enum {
     #define gestaltASFileServerAttr? 'hgfd'
     gestaltASFileServerPresent? = 0};

hrad (??? [???] on PowerBook 540c with System 7.5 Update 2.0 Seed 6)
|     Returns (OSType) 'Appl', same as 'srad'? (Anonymous)

HrIt (HearIt cp [1.0])
iadj (System? [7.1.2?] with PowerTalk?)
     (Display Enabler ext, Icon relocation INIT ID#3 [1.0])
idsp (System? [7.1?] on Macs with sound input?)
     Values found: 0xFFFF FFFF, 0x000C, 0x0000

immg (??? [???] on PowerBook 520/540? and Performa 630TV)
     Value found: 0x0100 0000. Version?

intD (??? [???])

     NOTE:
     This is a mystery selector.  It isn't installed by any software, as
     far as I know, but the Finder 7.1 checks for this selector in certain
     situations. (Marco Piovanelli)

irhk (IRTalk ext [1.2?])
     ???

     NOTE:
     Returns gestaltUnknownErr (-5550) when the extension is installed on
     a Macintosh without Infra-Red capable hardware. Or when IR software
     is disabled (AppleTalk off?). (Rene Ros)

jkbd (??? (Japanese!) ext [1.0], part of KanjiTalk)
lang (WorldScript II ? ext [7.2?], part of KanjiTalk7 and
                                   several language kits)
     gestaltLanguageMgrAttr
     Returns information about the Language Manager?

     enum {
     #define gestaltLanguageMgrAttr 'lang'
     gestaltLanguageMgr???  = 0};

LASB (LaserWriter Bridge cp [2.0?], part of Network Software Installer 1.5)
     gestaltLaserWriterBridgeAddr?

     #define gestaltLaserWriterBridgeAddr? 'LASB'

ldap (???)
lngb (WorldScript II ? ext [7.2?], part of KanjiTalk7 and
                                   several language kits)
     Value found: 0x00001FFF.

lstk (Speech Setup cp? [???], part of PlainTalk)
ltma (Link Tool Manager ext [2.0?], part of Apple Remote Access 2.0)
     gestaltLinkToolVersion?
     Returns the version of the Link Tool Manager as NumVersion?

     #define gestaltLinkToolVersion? 'ltma'

     NOTE:
     The only value I've seen returned was 0x02002008, which would mean
     '2.0d8' which was not correct since the 'vers' recource said '2.0f0'.
     The value is hardcoded in the .LTM Driver resource. (Rene Ros)

mash (System [7.1P?]/At Ease [1.0?])

     NOTE:
     The Starter cp (part of System 7.1P) and Launcher cp (part of
     System 7.5) both contain a 'mash' resource and includes a template for
     it. Can this be the same data-structure? (Rene Ros)

mbox (Mailbox Extension? ext [???], part of PowerTalk?)
     gestaltMailboxVersion?
     Returns version of Mailbox software as INTEGER.

     #define gestaltMailboxVersion? 'mbox'

MClk (Date & Time cp [7.5], part of System 7.5)
     (SuperClock! cp [4.0] by Steve Christensen)
mfdr (At Ease [1.0])
mjik (MenuMagic ext [1.0], part of System 7.1 Pro and 7.5)
mtem (Mount'em app [1.0b1-1.0b2] by Mike Wise and Chris Cotton of
                                    Apple Computer)
     See the 'ddsk' selector installed by DropDisk 1.0b3 and later.

mtv! (TV Setup cp [1.0], part of System for Macintosh TV?)

     NOTE:
     Not seen installed, disassembled control panel, meaning unknown.
     It's probably an address. (Rene Ros)

Norm (68K DebugServicesINIT ext [2.0?])
     Pointer to callback function?

NubA (Debugger INIT ext [1.0] distributed with MetroWerks CodeWarrior)
NubD (Debugger INIT ext [1.0] distributed with MetroWerks CodeWarrior)
NubH (Debugger INIT ext [1.0] distributed with MetroWerks CodeWarrior)
NubV (Debugger INIT ext [1.0] distributed with MetroWerks CodeWarrior)
octb (System? [7.5?] on PowerBook 520/540?)
ot   (??? [???])
     gestaltOpenTransportAttr?
     Returns information about the Open Transport software?

     enum {
     #define gestaltOpenTransportAttr? 'ot  '
     gestaltOpenTransportPresent? = 0};

     NOTE:
     Defined with early test-versions of Open Transport? Never seen
     installed. See the 'otan' selector.

otvr (Open Transport ??? [1.1?])
     gestaltOpenTransportVersion?
     Returns the version of Open Transport as ???. (Anonymous)

     #define gestaltOpenTransportVersion? 'otvr'

pclk (System [7.5.2]) INF?
     gestaltCPUClockSpeed?
     Returns the processor clock speed in Hz.

     #define gestaltCPUClockSpeed? 'pclk'

     NOTES:
     Only on Power Macintosh, not on 68K computers?

     See also 'bclk' in this section.

PhoN (PowerBook Setup cp [7.3.1?], PhoneINIT INIT resource)
port (Powerbook Duo Enabler [1.0])
     (System [7.5])
     (System Enabler 111 [1.0])
     (System Enabler 121 [1.0])
     (System Enabler 131 [1.0])
     (System Enabler 201 [1.0])
     gestaltPortAttr?
     Returns information about the ports?

     enum {
     #define gestaltPortAttr? 'port'
     gestaltHasInternalModem?   = 0?,
     gestaltHasExternalPrinter? = 1?,
     gestaltHasExternalModem?   = 2?};

     NOTE:
     System Enabler 201 and PowerBook Duo enabler contain an GDEF resource
     which indicates bits 0, 1 and 2 can be set. (Rene Ros)

ppad (Performa cp [1.1], part of System 7.1P)
ppcv (System? [???])
     gestaltPPCVersionAttr &AS16
     Returns the version of the PPC Toolbox? Or attribute bits?

     #define gestaltPPCVersionAttr 'ppcv'

pprf (Performa cp [1.1], part of System 7.1P)
ptlk (Speech Setup cp? [???], part of PlainTalk)
puir (IRTalk ext [1.2?])
     gestaltInfraRedManager?
     Returns the version of the manager for Infrared transmission? as BCD?

     #define gestaltInfraRedManager? 'puir'

     NOTE:
     Seen on PB 190cs prototype (0x0100) and PB 5300 (0x0200300). On a
     released PB 5300c it returns 0x01000200.
     (Anonymous, Rene Ros)

pwtr (PowerTracer cp [1.0a2NoOpt?])
pxtn (Desktop Printer Extension? ext [1.0])
     (QuickDraw GX? ext? [???])
     ???
     Returns the version of the ??? as NumVersion.

     NOTE:
     The Desktop Printer Extension included with LaserWriter 8.3 (version
     '1.0f1c2 (nodebug)') contains a resource of type 'GFUN' which looks
     very much like a selector function. The code in it checks for 'pxtn'
     and tries to return a version number. But the code 'pxtn' is never
     installed as a selector!? (Rene Ros)

Remt (AutoRemounter cp [???])
rmbg (System? [7.5.2?])
     Bits 0 and 1 set.

scrf (WorldScript Power Adapter ext? [7.5?])
serh (System? [7.1.2?])
     gestaltSerialHardware?
     Returns type of hardware used for serial I/O?

     enum {
     #define gestaltSerialHardware? 'serh' /* Serial Hardware */
     gestaltClassicSer? = 'Clas',  /* returned on PM 8100/80 */
     gestalt???         = 'TntS'}; /* returned on PM 7200, */
                                   /* PM 8500 and PM 9500 */
                                   /* with System 7.5.2 */

shal (SerialDMA ext [2.0.2?] part of 7.5.2 Printing Update [1.1])
     (System [7.1?])
     gestaltSerialHAL?

     #define gestaltSerialHAL? 'shal'

     NOTE:
     Returns 1 (Centris 660AV) and 2 (PowerMacs). The SerialDMA extension
     possibly also installs value 3.

     This selector may be installed but returns gestaltUnknownErr instead
     of zero. (Rene Ros)

slnk (MNPLinkTool? [1.0], part of Apple Remote Access)
sndx (Sound Manager ext [3.0]?)
     gestaltSoundMgrAttr?

     enum {
     #define gestaltSoundMgrAttr? 'sndx'
     gestaltSoundMgrPresent? = 0?};

SNKR (StyleWriter 1200 ext ? [1.0?])
srad (??? [???] on PowerBook 540c with System 7.5 Update 2.0 Seed 6)
     Returns (OSType) 'Appl', same as 'hrad'? (Anonymous)

sysu (System Update enbl [7.5 upd 2.0s3]) INF?
     gestaltSystemUpdateVersion?
     Returns the version number of the System Update enabler as BCD.

     #define gestaltSystemUpdateVersion? 'sysu'

     NOTE:
     Appears to been dropped with Update 2.0 Seed 8, probably because the
     update is now a full System 7.5.3 upgrade. (Anonymous)

thng (ThreadsINIT ext [2.0?], part of Threads Package)
thrd (ThreadsINIT ext [2.0?], part of Threads Package)
udsk (System [7.1.2 on PowerMac])
udsv (System [7.1.2 on PowerMac])
valk (System? [7.5.1? on Power Mac 5200)
     Bit 0 set.

vdrc (PC Exchange? cp [1.0?])
vmbs (System [7.0])
     gestaltVMBackingStoreRef?
     Returns the file reference number of the Virtual Memory storage file
     if VM is present.

     #define gestaltVMBackingStoreRef? 'vmbs'

vmcl (System, VM on [7.0])
vmem (RAM Doubler [1.0] by Connectix Corporation)
     gestaltVMExtensionMgr?
     Returns type of software used to extend the Virtual Memory Mgr?

     #define gestaltVMExtensionMgr? 'vmem'
     #define gestaltRAMDoubler? 'RaM2'

     NOTE: See 'Reports' chapter (RAMDoubler section) for more information.

wnkl (System? [7.5.2?])

Third Parties Software
----------------------
*DC* (DepthCharge cp [???] by Maf Vosburgh)
5mat (???)
Aarn (Aaron ext [1.0] by Greg Landweber)
     NOTE: See also 'Aarp', 'Aaru' and 'Copl' in this section.

Aarp (Aaron ext [1.0] by Greg Landweber)
     NOTE: See also 'Aarn', 'Aaru' and 'Copl' in this section.

Aaru (Aaron ext [1.0] by Greg Landweber)
     NOTE: See also 'Aarn', 'Aarp' and 'Copl' in this section.

AClk (AutoClock Extension ext [1.3?] by Jean-Pierre Gachen)
AcPC (AccessPC cp [3.0?] by Insignia Solutions)
     Version 3.0 always returns 0x8765 4321.

ADex (AfterDark [2.0?] by Berkeley Systems, Inc.)
ADii (AfterDark [2.0?] by Berkeley Systems, Inc.)

     NOTE:
     Not installed by AfterDark but the GDEF indicates it is able to return
     a response.

ADr2 (AfterDark [2.0?] by Berkeley Systems, Inc.)

     NOTE:
     Not installed by AfterDark but the GDEF indicates it is able to return
     a response.

ADR2 (DDExpand appl [3.7.7?] by Symantec Corp.)
     Returns an pointer to a parameter block with unknown structure. Offset
     0x0C seems to be a pointer to code. (Anonymous 'Fig')

     NOTE:
     Installed by a special version of the software instead of the 'ADRC'
     selector. Perhaps a special version with limited distribution to
     software vendors for working with the Autodoubler Internal (resource)
     Compressor. (Anonymous 'Fig')

     See also 'ADRC'.

ADRC (DDExpand appl [3.7.7?] by Symantec Corp.)
     Returns an pointer to a parameter block with unknown structure. Offset
     0x0C seems to be a pointer to code. (Anonymous 'Fig')

     NOTE: See also 'ADR2'.

ADTK (Talk*Control cp [???] by 2Way Computing, Inc.)
AP00..AP06
     (RapidLock cp, RapidTrak cp or drivers? [1.1], part of RapidTrak
      software by Insignia Solutions Inc.)
     It seems these selectors are installed for each harddisk connected to
     your Macintosh. The last two bytes of the selector is the SCSI ID.

AP17 (AccessPC cp [2.0?] by Insignia Solutions)
ApWi (ApplWindows cp [2.0?] by Hiro Yamamoto)
ASTN (Asante EN/SC ext [???] by Asante Technologies, Inc.)
aYmm (AfterDark [2.0?] by Berkeley Systems, Inc.)
AzNe (NameView cp [2.7?] by AStar Technologies, Inc.)
A–Tr (Trapper ext [1.0?] by Alessandro Levi Montalcini)
Bars (Virtual Desktop Extension ext [1.8?], part of Virtual Desktop
                                            by AWOL Software, Ross Brown)
Blad (Blood cp [1.0.1?] by Alessandro Levi Montalcini)
     NOTES:
     The B is actually the option-s character (0xA7).
     The d is actually the option-d character (0xB6).

bMRN (Super Boomerang cp [4.0?], part of Now Utilities by Now Software)
cc20 (???)
     NOTE: The 'cc' are actually option-c (0x8D).

CDFL (???)
CDmn (CDMenu cp [1.0?] by Henrik Eliasson)
CDUf (CDU cp [1.0?] by Connectix Corp.)
CDUt (CDU cp [1.0?] by Connectix Corp.)
cGnF (CommuniGate Notifier ext [1.0] by Stalker Software, Inc.)
CiCN (Color ICON Mania cp [1.0] by Yosuke Suzuki)
cLib (???)
Copl (Aaron ext [1.0] by Greg Landweber)
     NOTE: See also 'Aarn', 'Aarp' and 'Aaru' in this section.

CPPf (Power To Go cp [2.0?] by AlSoft, Inc.)
Cut! (Desktop Shortcut cp [1.0], part of Aladdin Desktop Tools
                                 by Aladdin Systems
DanS (PowerClick cp [1.0] by Daniel A. Segel)
Day* (PowerCentral cp [1.3?] by DayStar Digital, Inc.)
     Returns 0xFFFF FFFF when no card is installed?

     NOTE: The * is actually the option-8 character (0xA5).

Dbug (???)
DCDt (NoDesktopCleanup cp [1.0?] by Alessandro Levi Montalcini)
DCKc (Keys! cp [1.0] by Stefan Kurth)
     NOTE: The lowercase c is actually the control-q (Command key sign)
     character (0x11).

DD37 (DiskDoubler [3.7] by Fifth Generation Systems, Inc.)
DDAD (AutoDoubler cp [1.0?] by Symantec Corp.)

     NOTE: See also 'DDAE' and 'DDNF'

DDAE (AutoDoubler cp [1.0?] by Symantec Corp.)

     NOTES:
     Installed by a special version of the software instead of the 'DDAD'
     selector. Perhaps a special version with limited distribution to
     software vendors for working with the Autodoubler Internal (resource)
     Compressor. (Anonymous 'Fig')

     See also 'DDAD' and 'DDNF'.

DDCD (CopyDoubler cp [2.0.4?] by Symantec Corp.)
DDJB (???)
DDNF (AutoDoubler cp [1.0?] by Symantec Corp.)

     NOTE: See also 'DDAD' and 'DDAE'.

DFlh (DiskFlash cp [1.0], part of ALSoft Power Utilities by ALSoft, Inc.)
DlgV (Dialog View cp [2.11], formerly List Font cp by James W. Walker)
     See also 'LFnt'.

DPin (Screen Posters ext [3.0?] by Berkley Systems)
Dpth (DepthMaster cp [1.0] by Victor Tan)
DBPR (DATEBOOK PRO Extension ext [2.0.1?] by Aldus Corporation, now Adobe)
     Returns data about the current reminder? GDEF is called with 'SvA4'
     selector to initialize data inside the GDEF. (Rene Ros)

DWG! (Volume Menu cp [1.0] by David Gladstone, Chris Burns, Julian Harris)
EDCN (PPPReport cp [1.0b3?] by Eric de la Musse)
EgGP (Eagle ext [1.5?] part of Apollo [1.2?] by Jeremy Roussak)
ESCa (Escapade cp [1.0?] by Christopher R. Wysocki)
ESOC (Serial of Champions ext [???] by Mike Throckmorton)
Extn (Now Startup Manager cp [4.0?], part of Now Utilities by Now Software)
FCDV (RAMGauge cp [1.3?] by Syzygy Cult.)

     NOTE: The C is actually the option-shift-c character (0x82).

ffEx (???)
Fie  (Icon7 ext [???] by Inline Designs)
     gestaltIcon7?

fPth (FinderPaths cp? [???])

     NOTE: The f is actually the option-f character (0xC4).

fmci (FinderMenu INIT ext [1.0], part of UserLand's Frontier Runtime
      package)
FMnu (Now FolderMenus cp [5.0.1], part of Now Utilities by Now Software)
FtCg (FontPatchin cp [2.0?] by Keisuke Hara)
FUWi (OutTheWindow! ext [1.0] by Olivier Lebra)
FW14 (FileWave Administrator ext [2.0?], part of FileWave 2.0
      by Wave Research)
FWCP (File Tracker Controls cp [1.0] by Mark Aiken)
fWmM (Super Boomerang cp [4.0?], part of Now Utilities by Now Software)
GrEG (Greg's Buttons ext [3.1.4?] by Greg Landweber)
GtOp (MenuExtend cp [1.0], part of ALSoft Power Utilities by ALSoft, Inc.)
gV00 (PowerPort cp? [???])
gV01 (PowerPort cp? [???])
gV02 (PowerPort cp? [???])
gV03 (PowerPort cp? [???])
gV04 (PowerPort cp? [???])
gV05 (PowerPort cp? [???])
gV06 (PowerPort cp? [???])
gV07 (PowerPort cp? [???])
gV08 (PowerPort cp? [???])
gV09 (PowerPort cp? [???])
gV0A (PowerPort cp? [???])
gVDI (PowerPort cp? [???])
GVfd (???)
GVms (???)
GVso (Global Village Toolbox ext [2.1.4?] by Global Village Communication)
GVsp (Global Village Toolbox ext [2.1.4?] by Global Village Communication)
He20 (Helium cp [1.0?] by Robert L. Mathews)
HEID (Incognito cp [1.0?] by Manuel Veloso)
HPBG (HP Background ext [3.0?] by Hewlett-Packard Company)
     GDEF always returns value 1.
HPKb (??? external to MacSLIP [???] by Hyde Park Software)
HtLk (Reference Link ext [1.0] by James W. Walker)
IACi (QuicKeys Toolbox ext [???] by ???)
iHnd (Invisible Hand cp [1.0] by Carl Mauer)

     NOTE:
     Because this cp patches the _Random trap you can use this selector to
     determine its presence and refuse to continue.

in++ (Inline++TSM cp [2.0?] by Hideaki Iimori)
     The response is an address to a private (??? -- some fields look like
     they may be public, but the docs are in Japanese) parameter block.
     (Marco Piovanelli)

Info (Desktop SpeedBoost cp [1.0], part of Aladdin Desktop Tools
                                   by Aladdin Systems)
Intj (Interjection ext [???])
JAiN (Rival cp by Inline Designs)
     gestaltRival

     NOTE: The i is actually the option-u/i character (0x95).

jbxC (???)
jGnE (PageUp/Down ext [n/a] by ???)
jsm1 (???)
JXNM (NowMenus cp [4.0?], part of Now Utilities by Now Software)
KBCF (Easy KEYS cp [1.5] by Kerry Clendinning)
KBCM (Menu Choice cp [???] by Kerry Clendinning)
kPow (???)
KQae (KQ Apple Events ext [???], part of KeyQuencer
                                 by Alessandro Levi Montalcini)
KQue (KeyQuencer cp [???], part of KeyQuencer
                           by Alessandro Levi Montalcini)
LFnt (Dialog View cp [???], formerly List Font cp by James W. Walker)
     See also 'DlgV'.

LLSM (SAM Intercept ext [4.0?] by Symantec?)

     NOTE:
     Version 4.0 of SAM from Symantec had an improperly implemented Gestalt
     function which would cause a bus error if called. SAM 4.0 *must* be
     removed (not turned off) or upgraded to at least version 4.0.1 which
     was supposed to fix this problem. (Paul Cunningham, Teknosys, Inc.)

LNCH (Talk*Control cp [???] by 2Way Computing, Inc.)
LxRZ (Retro.SCSI? ext [2.0?], part of Retrospect by Dantz Development
      Corporation)
     (Remote? cp [2.0?], part of Retrospect by Dantz Development
      Corporation)
MAX` (PaperPort Extension ext [2.0?], part of Visioneer PaperPort
                                      by Visioneer, Inc.)
     Returns pointer to private data?

MAX~ (PaperPort Extension ext [2.0?], part of Visioneer PaperPort
                                      by Visioneer, Inc.)
     Returns information about the PaperPort software? Attribute bits?

MFK7 (Super Saver cp [1.1.2?] by Michael F. Kamprath)
Mgc! (Wizard INIT ext [1.0], part of Disk Wizard by Francois Pottier)
MJC& (AutoMenus II cp [???] by Michael Conrad)
MV10 (TearOFF cp [???] by Bad Boys' Software)
MV20 (Speed Access ext [1.0?] by Connectix Corporation)
nOAg (??? cp [1.2?], part of netOctopus by Pole Position)
nOAv (??? cp [1.2?], part of netOctopus by Pole Position)
     Returns version as NumVersion?

NCex (Now QuickFiler Extension ext [5.0.1], part of Now Utilities
                                            by Now Software)
NGst (NokNok cp [1.0?])
NkNk (NokNok cp [1.0?])
NTFY (TeamNotify ext [2.0?] by Team Coordination Software Inc.)
NowT (Now Toolbox ext [4.0?], part of Now Utilities by Now Software)
NWin (Now Startup Manager cp [5.0.1], part of Now Utilities
                                      by Now Software)
OLE2 (Microsoft OLE Extension ext [2.0.6?] by Microsoft Corporation)
Pax! (PaperPort cp [2.0?], part of Visioneer PaperPort by Visioneer, Inc.)
PAXC (PaperPort Extension ext [2.0?], part of Visioneer PaperPort
                                      by Visioneer, Inc.)
     Has something to do with compression?

PBUf (???)
PBUt (CDU cp [1.0?] by Connectix Corp.)
PopF (PopupFolder cp [???] by Inline Software)
PRT+ (PrintAid [0.9?] by James W. Walker)
PtrP (PrintPatrol [1.0] by Randy DeRuiter and John Champion)
QRef (QuickRef ext? [1.0] by Scott Bronson)
QCam (QuickCamVideo ext [1.0] by Connectix Corporation)
     (QuickCamMic ext [1.0] by Connectix Corporation)
QIC! (???)
Rem* (???)
ReSp (File Tracker Controls cp [1.0] by Mark Aiken)
RO40 (??? [???] by ???)
     DiskCopy 6.0 checks for this selector.

     NOTE: Selector is (OSType) 0x5285 3430.

RQDC (DropCheck cp [???] by Ronald B. Queloz)
SCTR (FaxMonitor ext [1.6?], part of FAXcilitate by PSI)
SDIT (???)
SEcl (ScreenEclipse cp [1.0], part of ALSoft Power Utilities by
      ALSoft, Inc.)
SFun (SF Windows [1.0] by Damon Cokenias)
SFwd (Open-wide cp [3.0?] by James W. Walker)
SLi2 (StuffIt SpaceSaver? ext [???] by Aladdin Systems, Inc.)
SLIP (???)
sMon (StuffIt SpaceSaver? ext [???] by Aladdin Systems, Inc.)
SNIT (Snitch ext [1.0] by Mitch Jones)
SPLO (SpigotVDIG ext [1.0] by SuperMac Technology)
ST20 (Snap-To cp [2.0?] by Trevden Sherzell)
STYH (StayHere! cp [2.0?] by Nobuhiro Miyatake)
TapT (TappyType cp [2.0?] by Colin Klipsch)
TgrX (Xmas Lights cp [1.0] by Tiger Technologies)
Tmon (TMON Pro cp? [3.0] by ICOM Simulations)
TRNS (Transporter ext [???], part of SAM administrator)

     NOTE:
     Not sure why, but calling this selector has caused many wierd
     interface problems with our application, such as scrollbars
     disappearing, and menus disabling. (Paul Cunningham, Teknosys, Inc.)

TSM+ (TSM Fix ext [1.0] by Matt Slot)
tsmH (TSMHelper ext [???]) by Donald Brown, CE Software)
UhOh (SpeedyFinder7 Extension ext [1.5.9h], part of SpeedyFinder7
                                            by Victor Tan)
UlOn (UndelineEnabler ext [2.0?], part of FontPachin package by
      Keisuke Hara)
     See also FtCg selector.

URL! (CyberFinder cp [2.0] by Leonard Rosenthol and Victor Tan)
URLf (CyberFinder cp [MacHack 1995 release to 1.1] by Leonard Rosenthol
                                                   and Victor Tan)

     NOTE:
     CyberFinder 2.0 installs the selector 'URL!'.

     The f is actually the option-f character (0xC4).

View (StuffIt Viewer Engine [???] by Aladdin Systems Inc.)
     gestaltViewerEngine
     The gestalt selector is not installed until someone (StuffIt) invokes
     the engine.

vmFn (RAM Doubler [1.0] by Connectix Corporation)
     Seems to return a memory address, perhaps to a function to control
     Virtual Memory?

     NOTE: See 'Reports' chapter (RAMDoubler section) for more information.

VrkG (Virex cp? [5.5?] by Datawatch Corp.)
VrkS (Virex cp? [5.5?] by Datawatch Corp.)

     NOTE:
     Merely calling the 'VrkS' selector seems to trigger a quick scan
     feature of Virex, which is only supposed to be accessible by a hot key
     setup by the Virex control panel (or something like that). When this
     happens, a dialog is displayed asking the user to select a volume or
     folder to scan. (Paul Cunningham, Teknosys, Inc.)

VrkU (Virex cp? [5.5?] by Datawatch Corp.)
WARE (???)
WREO (Replace Existing Options cp [???] by Jonathon Summers)

     NOTE: The W is actually the option-w character (0xB7).

Wttf (TeachText7.0 Font ext [???] by Jonathon Summers)

     NOTE: The W is actually the option-w character (0xB7).

XAsm (???)
xMe0 (OptiMem cp [2.0?] by Jump Dev. Group Inc.)

     NOTE: The 0 is a zero (0x30).

YaHu (Desktop SpeedBoost cp [1.0], part of Aladdin Desktop Tools
                                   by Aladdin Systems)
YAWN (Sleeper cp [1.1.4?] by St.Clair Software)
ygS  (???)

     NOTES:
     The y is actually option-u/y (0xD8).
     The last byte is actually the BEL ASCII code (0x07).

YoHo (Desktop SpeedBoost cp [1.0], part of Aladdin Desktop Tools)
                                   by Aladdin Systems)
YuHu (Desktop Makeover cp [1.0], part of Aladdin Desktop Tools)
                                 by Aladdin Systems)
*Men (OtherMenu ext [1.0] by James W. Walker)

Gestalt Manager Calls
=====================
All standard calls to the _Gestalt or _GestaltValueDispatch trap are listed
in this chapter.

Gestalt Manager Routines
------------------------
The CallSelectorFunctionProc and NewSelectorFunctionProc functions were
listed in the GestaltEqu.h file on E.T.O. #12 CD-ROM but not yet fully
documented.

FUNCTION Gestalt (selector: OSType; VAR response: LongInt): OSErr;
     Available since System 6.0.4.
     Trap Macro
       _Gestalt (0xA1AD)
     Registers on entry   D0: selector code
     Registers on exit    A0: response
                          D0: result code
     Result codes
       noErr                       0   No error
       gestaltUnknownErr       -5550   Could not obtain the response
       gestaltUndefSelectorErr -5551   Undefined selector

FUNCTION NewGestalt (selector: OSType; selectorfunction: ProcPtr): OSErr
     Available since System 6.0.4.
     Trap Macro
       _NewGestalt (0xA3AD)
     Registers on entry   A0: address of new selector function
                          D0: selector code
     Registers on exit    D0: result code
     Result codes
       noErr                       0   No error
       memFullErr               -108   Ran out of memory
       gestaltDupSelectorErr   -5552   Selector already exists
       gestaltLocationErr      -5553   Function not in system heap

FUNCTION ReplaceGestalt (selector: OSType; selectorfunction: ProcPtr;
                         VAR oldGestaltFunction: ProcPtr): OSErr;
     Available since System 6.0.4.
     Trap Macro
       _ReplaceGestalt (0xA5AD)
     Registers on entry   A0: address of new selector function
                          D0: selector code
     Registers on exit    A0: address of old selector function
                          D0: result code
     Result codes
       noErr                       0   No error
       gestaltUndefSelectorErr -5551   Undefined selector
       gestaltLocationErr      -5553   Function not in system heap

Gestalt Value Routines
----------------------
Please note the GestaltValue routines can be invoked through a library,
but since System 7.5 the GestaltValue routines are also part of the OS.
The GestaltValue routines are stack based and don't use registers.
The GestaltValue library first checks to see if trap 0xABF1 is implemented
(System 7.5 and later). If trap 0xABF1 is implemented, all calls to the
library are routed to this trap, otherwise the library uses embedded code.
Several Apple System selectors use the GestaltValueDispatch A-trap to
install the response value starting with System 7.5.

WARNING:
The GestaltValue library distributed originally checks for the wrong trap
(_ThreadDispatch, 0xABF2). Make sure your software doesn't crash when this
trap is installed by the Thread Manager extension.
(Most info about the GestaltValue functions was provided by
Marco Piovanelli and Dave Radcliffe).

FUNCTION NewGestaltValue (selector: OSType; newValue: LongInt): OSErr;
     Available as library and since System 7.5.
     Trap Macro                        Selector
       _GestaltValueDispatch (0xABF1)  0x0401
     Result codes
       noErr                       0   No error
       unimpErr                   -4   Unimplemented core routine
       memFullErr               -108   Ran out of memory
       (and other memory errors)
       gestaltDupSelectorErr   -5552   Selector already exists

FUNCTION ReplaceGestaltValue (selector: OSType;
                              replacementValue: LongInt): OSErr;
     Available as library and since System 7.5.
     Trap Macro                        Selector
       _GestaltValueDispatch (0xABF1)  0x0402
     Result codes
       noErr                       0   No error
       unimpErr                   -4   Unimplemented core routine
       memFullErr               -108   Ran out of memory
       (and other memory errors)
       gestaltUndefSelectorErr -5551   Undefined selector

FUNCTION DeleteGestaltValue (selector: OSType): OSErr; and
FUNCTION Delete (selector: OSType): OSErr;
     Available as library and since System 7.5.
     Trap Macro                        Selector
       _GestaltValueDispatch (0xABF1)  0x0203
     Result codes
       noErr                       0   No error
       unimpErr                   -4   Unimplemented core routine
       gestaltUndefSelectorErr -5551   Undefined selector

Undocumented Gestalt Manager Routines
-------------------------------------
FUNCTION? GestaltDispatch? (???):OSErr;?
     Trap Macro
       _GestaltDispatch (0xA0AD)
     Registers on entry   ???
     Registers on exit    ???
     Result codes
       noErr                       0   No error
       ???

     NOTE:
     Found in the MPW, THINK C and THINK Pascal Traps Interface file
     on 'Bookmark CD 14'.
     Available since System 6.0.4 but code will always return error -50
     (paramErr). (Lawrence D'Oliveiro, Rene Ros)

FUNCTION? GetGestaltProcPtr? (selector?: OSType;
                              var selectorfunction: ProcPtr): OSErr;?
     Trap Macro
       _GetGestaltProcPtr (0xA7AD)
     Registers on entry   D0: selector code?
     Registers on exit    ??: address of selector function
     Result codes
       noErr                       0   No error
       ???

     NOTE:
     Found in the MPW Traps Interface file on 'Bookmark CD 14'.
     Available since System 6.0.4 but code will always return error -50
     (paramErr). (Lawrence D'Oliveiro, Rene Ros)
     I (Rene Ros) have written Pascal code to do what this system call
     probably is planned to do in the future.

FUNCTION SetGestaltValue (selector: OSType; newValue: LongInt): OSErr;
     Available since System 7.5?
     Trap Macro                        Selector
       _GestaltValueDispatch (0xABF1)  0x0404
     Result codes
       noErr                       0   No error
       ???

extern  pascal OSErr GetGestaltSelectors(UInt32 theCount,
                                         UInt32 skipCount,
                                         GestaltIterator *theItems);
     Available starting with Copland?
     Trap Macro                        Selector
       ???                             ???
     Result codes
       noErr                       0   No error
       ???

     struct GestaltIterator {
         UInt32   totalItems;
         UInt32   validItems;
         UInt32   iterationKey;
         OSType   theItems[1];
     };
     typedef struct GestaltIterator GestaltIterator;

Kilo-liners
===========
This chapter will list very small pieces of code which are related to
any Gestalt Routine.

Direct Gestalt Calls
--------------------
You can use the following code to call directly the Gestalt, NewGestalt and
ReplaceGestalt traps. In that way the (large) glue code will not be
installed by your compiler. (Contributions by Lawrence D'Oliveiro and
Marco Piovanelli).

FUNCTION Gestalt (selector: OSType; VAR response: LongInt): OSErr;
   inline $225F, $201F, $A1AD, $2288, $3E80;
      { move.l (sp)+, a1 }
      { move.l (sp)+, d0 }
      { _Gestalt }
      { move.l a0, (a1) }
      { move.w d0, (sp) }

FUNCTION NewGestalt (selector: OSType;
                     gestaltFunction: ProcPtr): OSErr;
   inline $205F, $201F, $A3AD, $3E80;
      { move.l (sp)+, a0 }
      { move.l (sp)+, d0 }
      { _NewGestalt }
      { move.w d0, (sp) }

FUNCTION ReplaceGestalt (selector: OSType;
                         gestaltFunction: ProcPtr;
                         VAR oldGestaltFunction: ProcPtr): OSErr;
   inline $225F, $205F, $201F, $A5AD, $2288, $3E80;
      { move.l (sp)+, a1 }
      { move.l (sp)+, a0 }
      { move.l (sp)+, d0 }
      { _ReplaceGestalt }
      { move.l a0, (a1) }
      { move.w d0, (sp) }

Direct GestaltValue Calls
-------------------------
You can use the following code to call directly the NewGestaltValue,
ReplaceGestaltValue and DeleteGestaltValue when the _GestaltValueDispatch
trap is available. &AS04

FUNCTION NewGestaltValue(selector: OSType, newValue: LongInt): OSErr;
   inline $303C, $0401, $ABF1;

FUNCTION ReplaceGestaltValue(selector: OSType,
                             replacementValue: LongInt): OSErr;
   inline $303C, $0402, $ABF1;

FUNCTION DeleteGestaltValue(selector: OSType): OSErr;
   inline $303C, $0203, $ABF1;

GestaltSelectorZero
-------------------
With all the selectors that are supposed to return non-zero values if
installed, it may be helpful to have an utility routine that returns a zero
value (instead of an error) if a selector isn't installed. It's short and
sweet because it makes a direct call to the _Gestalt trap; of course this
means you can't use it on systems earlier than 6.0.4.
(Contributed by Lawrence D'Oliveiro)

FUNCTION GestaltSelectorZero (Selector: OSType): LongInt;
{returns the value of the specified Gestalt selector,}
{or zero if unknown.}
   inline $201F, $A1AD, $6702, $91C8, $2E88;
      { move.l (sp)+, d0 }
      { _Gestalt }
      { beq.s @2 }
      { sub.l a0, a0 }
      { @2: move.l a0, (sp) }

GestaltBitTest
--------------
The GestaltBitTest is a piece of inline assembly code which tests if the
specified bit is set in the value from the specified Gestalt selector
(false if the Gestalt call returns an error).

Example:
    GestaltBitTest(gestaltAppleEventsAttr, gestaltAppleEventsPresent)

(Contributed by Lawrence D'Oliveiro)

FUNCTION GestaltBitTest(Selector: OSType; BitNr: Integer): Boolean;
   inline
      $321F, $201F, $A1AD, $6702, $91C8, $2008, $0300, $56C0, $4400, $1E80
      { move.w (sp)+, d1 }
      { move.l (sp)+, d0 }
      { _Gestalt }
      { beq.s @2 }
      { sub.l a0, a0 }
      { @2: move.l a0, d0 }
      { btst d1, d0 }
      { sne.b d0 }
      { neg.b d0 }
      { move.b d0, (sp) }

Call Gestalt Function Direct
----------------------------
Suppose you have just loaded an GDEF resource, or replaced one and keep the
original around and store a pointer to it somewhere private. Suppose next,
you want to call it to obtain a response without using yet another selector.
Thats what the following inline code is useful for. Just pass it the
usual selector and result parameters but also a pointer to the GDEF
(Lock it if it's a relocatable block).

FUNCTION CallGestaltDEF (selector: OSType;
                         var result: LongInt;
                         aRoutine: ProcPtr): OSErr;
    inline $205F, $4E90;
       { move.l (sp)+, a0 }
       { jsr (a0) }

Reports
=======
When someone reports some findings involving several selectors and/or a
report is too long to include with the selector entry above, that report
is listed here. They should be as short as possible with the maximum
amount of information.

Accessing the Gestalt Manager
-----------------------------
(by Rene Ros)

Several applications can use additional code to expand their capabilities
and using this they may be able to access the Gestalt Manager. The software
listed below are additional code providing access to the Gestalt Manager.

Only a few locations are listed here, use the filename to search for other
locations. Or use the known mirror sites of FTP sites.

CheckGestaltFor (Neil Shulman)
     Hypercard external to access the Gestalt Manager.

     ftp://sumex-aim.stanford.edu/info-mac/card/check-gestalt-for-xcmd.hqx

Gestalt Pro 1.1.2 (Rene G.A. Ros)
     External for 4TH Dimension Relational Database application from
     ACI/ACI US.

     ftp://sumex-aim.stanford.edu/info-mac/dev/a4d/ext/gestalt-pro-112.hqx

Gestalt XFCN 3.2.1 (Jeff Iverson)
     Hypercard XFCN to query the Gestalt Manager.

     ftp://sumex-aim.stanford.edu/info-mac/card/gestalt-321.hqx

GestaltExt (Andre Cavegn)
     External for 4TH Dimension Relational Database application from
     ACI/ACI US.

     ftp://sumex-aim.stanford.edu/info-mac/dev/a4d/ext/gestalt-ext.hqx

Get Gestalt (AppleScript addition) 1.2 by Mark Alldritt
     Provides access to the Gestalt Manager for AppleScript scripts.

     ftp://gaea.kgs.ukans.edu/applescript/osaxen/script-tools-131-as.hqx

Informant XFCN 1.0 (Jeff Iverson)
     Hypercard XFCN to query the Gestalt Manager.

     ftp://sumex-aim.stanford.edu/info-mac/card/information-10-xfcn-demo.hqx

AppleShare File & Print Server selector codes
---------------------------------------------
(by Rene Ros)

The selectors are defined when the application has run. If it is still
running (or wasn't properly quit) the response is one. When the application
has properly quit the response is zero.
     admn AppleShare Admin
     asps AppleShare Print Server
     hgfd AppleShare File Server
(these three are undocumented)

AppleTalk
---------
(by Rene Ros)

With the release of the System 7 Tuner product, AppleTalk will not be
loaded at startup, if prior to the previous shutdown AppleTalk was turned
off in the Chooser. Under this circumstance, the 'atkv' selector is not
available. If the 'atkv' selector is not available under System 7, this is
an indicator that AppleTalk cannot be turned on without doing so in the
Chooser and rebooting the system. &AT02

Clock Chipped
-------------
(provided by Marc Schrier with additional information from Jeff Baudin and
 Mike Cohen and edited by Rene Ros)

Several Macintosh computers have been observed to return a different
machine type value (using the gestaltMachineType selector) when the
clock speed was changed. Mainly Power Macintosh computers behave like
this. The following tables provide an overview of these values.

In addition to clock chipping a Macintosh, you can also:
- swap a resistor in a Centris 650 to make it a Quadra 650;
- remove jumper J18 of a Quadra 605 and it becomes a LC475.
- install jumper J18 on a LC475 and it becomes a Quadra 605.
- install and remove resistors and jumpers from the Wombat motherboard
  used in the Centris 650, Quadra 650 and Quadra 800 to switch between
  those three computers and two new, unreleased machines.
- remove the LED jumper from a PM 7500 and it becomes a PM 8500.

===========================================================================
Machine Type values returned by clock-chipped M680x0 computers
===========================================================================
Model Name      CPU Speed (MHz)
                 20   25   33
---------------------------------------------------------------------------
LC III                27-  62
Q605%            93!  94-  95!
LC475%           86!  89-  90!
LC575            87!  91!  92-
---------------------------------------------------------------------------
- value returned when unmodified
! value not belonging to any known, released computer
% if you remove jumper J18 from a Q605 it becomes a LC475
---------------------------------------------------------------------------


===========================================================================
Machine Type values returned by clock-chipped PowerPC computers
===========================================================================
Model Name      CPU Speed (MHz)
                 60   66.6 75   80   82   90  100   110   112   120
---------------------------------------------------------------------------
PM 6100/60(AV)   75- 100       101!
PM 6100/66(AV)   75  100-      101!
PM 7100/66(AV)  111! 112-      113! 114!
PM 7100/80(AV)       112        47-
PM 8100/80(AV)   61!  64!       65-
PM 8100/100(AV)                 65             55-   40          12!
PM 8100/110(AV)                 65             55    40-         12!
Power100#                  65             55   55-         12!
---------------------------------------------------------------------------
- value returned when unmodified
! value not belonging to any known, released computer
# Macintosh clone by Power Computing
---------------------------------------------------------------------------


===========================================================================
Machine Type values returned by modifying the Wombat motherboard
===========================================================================
Architecture   Jumper   No Resistors   Resistor R151   Resistor R152
---------------------------------------------------------------------------
M68040         No        51!            30  C650        36  Q650
               Yes       59!            30  C650        35  Q800
PPC PDS Card   No       123  PM 800    120  PM C650    122  PM Q650
               Yes      N/A            120  PM C650    123  PM 800
---------------------------------------------------------------------------
! value not belonging to any known, released computer
---------------------------------------------------------------------------

For more info on clock-chipping (or otherwise modifying) Macintosh
computers:
http://bambam.cchem.berkeley.edu/~schrier/mhz.html

Copland
-------
(provided by Anonymous contributor, edited by Rene Ros)

To have the new microkernel, implemented by Copland, not depend on the
system registry or Gestalt a system call is provided instead:

enum
{
    kSystemInformationVersion = 0
};

typedef struct SystemInformation
{
    ItemCount    numPhysicalRAMPages;
    ByteCount    pageSize;
    ByteCount    dataCacheBlockSize;
    UInt32       processorVersionNumber;
    UInt32       numCPUs;
    ProcessID    kernelProcessID;
};

OSStatus GetSystemInformation (PBVersion              theVersion,
                               SystemInformation *    theSystemInfo);

Undoubtely Gestalt itself will use this call to return the information
too.

For more reading:
    MicroKernel White Paper

Copy protection using Gestalt
-----------------------------
(by Rene Ros)

In D e v e l o p 17 Brigham Stevens suggests to use Gestalt and FindFolder
as a way to implement copy protection in the most compatible way possible.
By determining several characteristics at installation from the Gestalt Mgr
and the DirID of the System Folder with FindFolder you can check for this
info later. When is has changed you can then ask for the serial number
or a password again.

Disabling PowerKey
------------------
(from the Macintosh System 7.5 Update 2.0 Developer Read Me provided by an
 anonymous contributor)

Using the 'pwky' selector you can enable or disable the PowerKey and/or the
Shutdown dialog. The code to use this hack should be something like this:

#ifndef kPowerKey
#define kPowerKey       0x7F
#define kShutdownDlog   0x7E

#define kDissablePwKy   (short) 0x6B
#define kEnablePwKy     (short) 0x00

#define kNoDismiss      0x00
#define kOneSecond      0x70
#define kTenSeconds     0x400
#endif

typedef pascal OSErr (*PwrKeyProc)(short item, short action);


/************************************************************/
void   main()
{
   OSErr           theErr;
   PwrKeyProc      pPwrKey;

   theErr = Gestalt('pwky', &pPwrKey);
   if(theErr == noErr)
   {
         /* To dissable the powerkey */
         theErr = (*pPwrKey)(kPowerKey,kDissablePwKy);

         /* To enable the powerkey */
         theErr = (*pPwrKey)(kPowerKey,kEnablePwKy);

         /* Never dismiss the shutdown dialog */
         theErr = (*pPwrKey)(kShutdownDlog,kNoDismiss);

         /*  Dismiss the shutdown dialog in 112 Ticks (approx. 1 sec) */
         theErr = (*pPwrKey)(kShutdownDlog,kOneSecond);

      etc…
   }

   return;
}

See also the 'pwky' selector entry.

Environs & SysEnvirons
----------------------
(by Rene Ros)

Using Macsbug it is very easy to determine that the SysEnvirons function
uses the Gestalt Manager to fill the fields of the system environment
record. So, when you install your own gestalt definitions by using the
ReplaceGestalt function this will also change the information returned
by SysEnvirons.
The older Environs function doesn't use the Gestalt Mgr and the code
seems to look only at two values in ROM.

Executor Mac-emulator
---------------------
(by Rene Ros)

Executor is a Macintosh Emulator for DOS machines, published by
Abacus Research and Development, Inc. (1993/1994). The Gestalt Manager is
also emulated and the version I have seen (on a 486DX) says it's a MacPlus
with a 68LC040 processor with MMU. The 'sysv' selector returns 0x607 but
it also lists a lot of selectors usually not installed by 6.0.7. Like
the 'edtn' and 'stdf' selectors. For those it then simply returns zero.
Strangely enough the 'tabl' selector is not installed, but this doesn't
confuse the Gestalt! application!

Gestalt Apple Event
-------------------
(by John W. Baxter)

The scriptable Finder, implemented by the Finder Scripting Extension,
provides an Apple event to query the Gestalt Manager. This can be used from
AppleScript using the 'computer' command.
And using the PPC Toolbox this now also means you can query a remote
computer, provided the Finder Scripting Extension is installed.
The Finder Scripting Extension is installed with System 7.5 (which also
includes Finder 7.1.4) but can also be used with Finder 7.1.3. The
extension will later be rolled into the Finder.

The direct parameter for this event is a Gestalt selector code. If this is
the only parameter, the result is the result of calling Gestalt with that
code.

An optional second parameter can be included, in which case it is a 32 bit
number against which the result of calling Gestalt with the given selector
is tested. When this parameter is present, the event returns true if all
bits set in the optional parameter are set in the result from Gestalt, and
false otherwise. In AppleScript, when telling Finder:
     computer "os  " has 3
returns true if the low-order two bits are set in the result from Gestalt.
The equivalent event built "by hand" would be addressed to Finder (on the
machine of interest) and would have the parameters
     key        value      type
     '----'     'os  '     typeType        (alternative:  "os  "  typeChar)
     'has '     3          typeLongInteger ('has ' is keyASPrepositionHas)

The event class would be kAEFinderSuite ('fndr'), and the event ID would be
kAEGestalt ('gstl').

For more reading:
    D e v e l o p Magazine, Issue 20. "Scripting the Finder from your
          Application" by Greg Anderson, page 65.
    Finder Suite documentation available (starting in March 1995) on the
          Developer CD Series (Reference) as
          :Technical Documentation:Apple Events Registry & Suites:
           AE Suite Finder:Finder Suite

Gestalt Applications
--------------------
(by Rene Ros)

Several specialized applications are available to display all installed
Gestalt selectors. And several other applications heavily depend on the
Gestalt Manager to show information on hardware and software.

Only a few locations are listed here, use the filename to search for other
locations. Or use the known mirror sites of FTP sites.

DisplayGestalt (Craig Marciniak)
     Small application displays configuration using Gestalt Mgr, includes
     C-source.

     ftp://mac.archive.umich.edu/development/libraries/displaygestalt.cpt.hqx

Gestalt! 3.0 (Roland Mansson)
     Displays responses from installed selectors.

     ftp://ftp.lu.se/pub/mac/util/gestalt300.cpt.hqx
     ftp://sumex-aim.stanford.edu/info-mac/cfg/gestalt-300.hqx

     Contact: Roland Mansson ([e-mail])

GestaltDA 0.4 (Carl C. Hewitt, Apple Computer Inc.)
     Displays responses from installed selectors.

     CD-ROM: Bookmark CD (Apple Developer Group)
     :Tools & Applications:OS/Toolbox:GestaltDA 0.4

     Contact: D e v e l o p ([e-mail])

Gestalt Environment 7
     Application to list a number of installed selectors.

     mailto:[e-mail]
            'archive get software/ge7.hqx'

Go Gestalt appl 1.5 (Paul Reznick)
     Displays information obtained thru the Gestalt Mgr.

     mailto:[e-mail]
            'archive get software/go-gestalt-15.sit.hqx'

     Contact: Paul Reznick ([e-mail])

Tattle-Tech appl (Decision Makers Software, Inc.)
     Uses Gestalt manager extensively to display all known information.

     ftp://sumex-aim.stanford.edu/info-mac/cfg/tattle-tech-22.hqx

     Contact: John Mancino ([e-mail])

TechTool appl 1.0.8 (Micromat Computer Systems)
     Application to reset PRAM, rebuild DTDB and show Gestalt info.

     ftp://sumex-aim.stanford.edu/info-mac/cfg/tech-tool-108.hqx

GestaltValue
------------
(by Marco Piovanelli, addition by Rene Ros)

The first time you call NewGestaltValue, the library installs two non-
relocatable blocks in the system heap and the 'gval' gestalt selector. One
of the blocks is filled with code: it's actually a gestalt definition that
implements GestaltValue's shared mechanism. The second block contains the
selectors and values GestaltValue manages. The response returned by the
'gval' selector is a pointer to the second non-relocatable block in the
system heap.

Dave Radcliffe wrote on 23 March 1993 regarding some information, about the
GestalValue glue code, listed with version 1.4 of this list:
---------------------------------------------------------------------------
The information on the _GestaltValue trap (0xABF2) is correct based on the
glue, but because of a mistake on my part, the glue should be checking for
0xABF1. A new version of the glue is being distributed on the developer CD
next month...
---------------------------------------------------------------------------

The GestaltValue library can be found at Info-Mac.
(ftp://sumex-aim.stanford.edu/info-mac/dev/gestalt-value-lib.hqx)

GestaltValue & CodeWarrior Problem
----------------------------------
(by Francois Pottier)

The GestaltValue.o library is made up of several routines. The first time
someone calls a routine from the library, the library installs itself into
the System Heap and uses NSetTrapAddress to set up its own trap. Subsequent
calls to the library will just map to a trap call. This allows the code to
be loaded only once in memory, even if several INITs use GestaltValue.

What's the problem? In order to install itself into the System Heap, the
GestaltValue code must compute how big it is; it does this by subtracting
the address of the first routine from the address of a stub routine located
after the last real routine. That's common practice. It assumes, however,
that the linker will preserve the order of the routines.

But CodeWarrior's "Import MPW library" command does not preserve the order
of the functions it finds inside the .o file. As a result, when you call
NewGestaltValue for the first time, the library finds its own size to be
negative. It asks the Memory Manager for a block of negative size and
returns an error (memFullErr, I believe).

Note that this only happens if your software is the first to call
GestaltValue since the machine started up. Also, I think it won't happen
under System 7.5 because GestaltValue is part of 7.5. If your program
requires 7.5, you probably don't need the GestaltValue.o glue at all.

Glue code
---------
(by Rene Ros, based on THINK Reference 2.0)

These development/compiler software contain glue-code to handle a few
selectors even when the Gestalt Manager is not available.

     THINK C      (5.0 and later)
     THINK Pascal (4.0 and later)
     MPW          (3.2 and later)

The following selectors can be handled by the glue-code, with all others
an error (gestaltUndefSelectorErr) will be returned.

     gestaltAppleTalkVersion = 'atlk';
     gestaltFPUType          = 'fpu ';
     gestaltKeyboardType     = 'kbd ';
     gestaltLogicalRAMSize   = 'lram';
     gestaltMachineType      = 'mach';
     gestaltMMUType          = 'mmu ';
     gestaltPhysicalRAMSize  = 'ram ';
     gestaltProcessorType    = 'proc';
     gestaltQuickdrawVersion = 'qd  ';
     gestaltSystemVersion    = 'sysv';
     gestaltVersion          = 'vers';

Unless you are using direct calls, ofcourse.

INITGestalt standard
--------------------
(by Rene Ros, based on INITGestalt proposal by Jeremy Roussak and Rene Ros)

The INITGestalt proposal tries to define a standard memory structure which
describes the basic information about software. Using the Gestalt call
other software obtains a pointer to the structure for software which uses
the INITGestalt standard.

You can find the latest version of the INITGestalt proposal at
     ftp://sumex-aim.stanford.edu/info-mac/dev/init-gestalt-*.txt
Or by sending an email, with subject 'archive get init-gestalt*', to
     [e-mail]

To test your software during implementing INITGestalt, or just to check
out a selector, you definitly need INITGestalt Inspector:
     ftp://sumex-aim.stanford.edu/info-mac/cfg/init-gestalt-inspector-10.hqx

Machine Names
-------------
(by Rene Ros et al.)

The STR# resource with ID -16395, inside the system file, contains a list
of Macintosh machine names. The selector gestaltMachineType ('mach')
returns a value which can be used as the index value with a GetIndString
call to get the appropriate machine name. There area some exceptions to
this and these are discussed in this report.

On Macintosh Performas (System 7.1), the Machine Name STR# resource will
always return the string "Macintosh" (not "Macintosh Performa 450" or
"Performa 450").  On all other Macintoshes, the string will return the
correct name. (Mark Dawson)
[And] if you do a dirty install [of System 7.5 or later] (right on top of
an existing, pre-7.5 System), your machine type and icon will be preserved.
If you do a clean install, you'll get the generic name/icon in the
Finder's "About This Macintosh..." dialog. (Tim Swihart)
This can be fixed by using the freeware Mac Identifier extension, located
at ftp://ftp.fluxsoft.com/pub/Mac_Identifier_2.0.sit.hqx.
Or use the WhoAmI? application, which can be found at
ftp://sumex-aim.stanford.edu/info-mac/cfg/who-am-i-121.hqx. (Rene Ros)
Apple says that in the future ID's will be reused and the kMachineNameStrID
will contain only the text '  Macintosh' (two spaces first) &AT01
This policy seems to have changed because the System 7.5 Update enabler
installed by System 7.5 Update 1.0 either contains '  Macintosh',
'  Macintosh PowerBook' or '  Power Macintosh' (all with two leading
spaces). Perhaps the 'mach' selector in the future will be used to indicate
the category only. Then we'll get another mechanism/selector to get the
real machine type? Rumour goes a new ROM is developed which allows clone
makers to have their machines identified properly. (Rene Ros, with some
info from John Mancino)

All system enablers have the machine name resource included to replace the
one in the System file. In most cases this resource lists the same
Macintosh names as the original one in System 7.1 and adds the names of the
machines the enabler is intended for. But some only list the machines the
enabler is used with. Therefore, if you want to display the name of a
machine which isn't of the current machine type you can't rely on this
resource anymore. (Rene Ros)

The Performa 600 was originally planned to ship as Macintosh IIvm but the
name was changed because users thought 'vm' meant 'Virtual Memory'. MOST
system enablers (i.e. 001, 040, 065 & 201) contain this original name.

The Machine Name resource in the MAE Enabler 1.0 contains the string
"MAE 1.0" in these items: 19, 28, 130, 131 and 132.

The PowerPC Enabler 1.1 enabler contains a Machine Name resource which
lists these names:
     items 1-66 contain the item number itself except:
           12 Power Macintosh 8100/120
           31 Paula's Desk Macintosh
           39 Workgroup Server 9150
           40 Power Macintosh 8100/110
           46 Power Macintosh 6100/66
           47 Power Macintosh 7100/80
           55 Power Macintosh 8100/100
           64 Power Macintosh 8100/60
           65 Power Macintosh 8100/80
           66 Power Macintosh 8100/100
     items 67-115 are empty except:
           75 Power Macintosh 6100/60
          100 Power Macintosh 6100/66
          101 Power Macintosh 6100/80
          111 Power Macintosh 7100/60
          112 Power Macintosh 7100/66
          113 Power Macintosh 7100/80
     items 116-123 contain the text "  Power Macintosh"
"Paula's Desk Macintosh" disappeared again with version 1.1.1 of the
PowerPC enabler, it was replaced by the number '31' ! :-)
The duplicate names for some of the Power Macintosh models was resolved
and is it is now know that some values belong to a never to be released
ROM version. See the gestaltMachineType entry for more detailed
information.

The PowerBook 5300/190 Enabler now lists the full machine names again!
(Eric-Paul Rebel)

Macintosh Application Environment
---------------------------------
(by Rene Ros, with thanks to Jos van Wezel for providing the workstation
 and installing the software.)

Using the MAE 1.0 demo version is quite stressful since it expires after
eight hours! Copying files to a disk doesn't work also because all you
are left with is an file with only the resource map and a few resources.
All resources are maintained by MAE. But by using ResEdit it is possible
to copy the resources itself one for one to a file on a floppy disk.
Under MAE 1.0 these results were found on a SUN SPARCstation 5:

===========================================================================
Summary of Gestalt Selectors installed with MAE 1.0
===========================================================================
Selector      Response  Remark
---------------------------------------------------------------------------
a/ux          3.0.1
cput              5     MC68040
fpu               0     none
mach             19     which is the LC, but the MAE Enabler only has
                        'MAE 1.0' in the machine name STR# resource
mmu               0     none
proc              5     MC68040)
rom            2048K
romv           1917
snd               0     no sound support, no system beeps to choose from
snhw           awac
cith              0     huh?
---------------------------------------------------------------------------

See also a note with the gestaltMachineType ('mach') selector entry.

Macintosh Clones
----------------
(by Rene Ros, contributions by Jean-Pierre Curcio, Kenneth Knotts and Marc
 Schrier. Also based on MacWEEK articles.)

So far the clone manufacturers have released computers which hardware
is identical, though clockspeed may be different, to other computers
released by Apple. This section contains a table of clone model names and
the equivalent Apple ID number and constant name.

The Pioneer clone (codename Pioneer MPC-GX1 where MPC stands for Multimedia
Personal Computer) was observed at CeBIT '95.

===========================================================================
Relabled Machines
===========================================================================
Manufacturer       Model Name          Apple Hardware Model
                                       ID    Constant
---------------------------------------------------------------------------
Pioneer            MPC-GX1             100   gestaltPowerMac6100_66
Power Computing    Power 100            55   gestaltPowerMac8100_100
                   Power 120            12!  gestaltPowerMac8100_120
                   PowerWave 604/120    67   gestaltPowerMac9500
                   PowerWave 604/132    67   gestaltPowerMac9500
                   PowerWave 604/150    67   gestaltPowerMac9500
Radius             81/110               40   gestaltPowerMac8100_110
                   System 100          ???   gestaltPowerMac8100??? ?
---------------------------------------------------------------------------
! value not belonging to any by Apple released computer
---------------------------------------------------------------------------

Modern Memory Manager
---------------------
(by John W. Baxter and Eric Schlegel)

The Universal Headers from Apple have a revised Memory Manager heap zone
header and named constants, which provide a documented methode of detecting
the Modern Memory Manager. It is as yet unknown whether the kNewDebugHeap
flag set implies kNewStyleHeap set.  The code here does not assume so...but
some might wish to test each flag in its own function.

Boolean IsModernMemory (void) {

    THz myZone = GetZone ();

    return (myZone->heapType & (kNewStyleHeap | kNewDebugHeap)) != 0;
    }

If you use older headers, replace the return statement with this line:

    return (0 != ((*myZone).maxNRel & 0x0600));

The new headers have the heapType field as a Byte (followed by a Byte
filler), together replacing the maxNRel short.  The bits in it are defined
by these masks:

enum {
/* masks for Zone->heapType field */
    k32BitHeap      = 1, /* valid in all Memory Managers */
    kNewStyleHeap   = 2, /* true if new Heap Manager is present */
    kNewDebugHeap   = 4  /* true if new Heap Manager is running in debug
                            mode on this heap */
};

PPC Libraries
-------------
(based on a posting by John Baxter in the comp.sys.mac.programmer Usenet
 newsgroup on Internet.)

Some of the Gestalt selector functions are smart enough to avoid crashing
when the user removed the library file from the Extensions folder without
restarting the machine. And some selector functions aren't that smart.
Safest is to preflight the first call you make into the library (for code
or data) or include a preflight in your startup.

QuickTime
---------
(by Michael Hecht, additions by Rene Ros)

If you install QuickTime under System 6, a major portion of the Alias
Manager and FSSpec support is also added. But, QT doesn't implement the
Gestalt selectors because the implementation is not complete. You must
check for either Alias Mgr or QuickTime.

These are the limitations for the Alias Mgr installed by QuickTime:
    - NewAlias will accept fromFile parameter, but it never creates a
      relative alias.
    - NewAliasMinimalFromPath and ResolveAliasFile aren't available.
    - ResolveAlias and UpdateAlias ignore the fromFile parameter.
    - MatchAlias may be called but the kARMMultVols, kARMSearchMore and
      kARMSearchRelFirst flags aren't available and ignored if passed.
      Also, a matchProc will never be called.
    - Won't mount network volumes.

And these are the FSSpec calls available with System 6 when QuickTime is
installed:
    - FSMakeFSSpec
    - FSpOpenDF
    - FSpOpenRF
    - FSpCreate
    - FSpDirCreate
    - FSpDelete
    - FSpGetFInfo
    - FSpSetFInfo
    - FSpSetFLock
    - FSpRstLock
    - FSpRename
    - FSpCatMove
    - FSpOpenResFile
    - FSpCreateResFile
    - FSpGetCatInfo

See for more information Technical Note M.QT.MovieTB.Q&As (QT 510) and
D e v e l o p 11 magazine on page 122.

RAM Doubler
-----------
(by anonymous contributor and Rene Ros)

RAM Doubler implements virtual memory in a different way than the normal
Apple VM mechanism. It looks like this is done in corporation with Apple
since a selector installed by RAM Doubler is 'vmem' which is all lower-case
and thus reserved by Apple.
In addition the response from this selector is always (long)'RaM2' which
is the creator type of RAM Doubler. It seems this selector is used to
indicate which software is used to extend the capabilities of the Virtual
Memory Manager.
RAM Doubler also installs the selector 'vmFn' which seems to be a pointer
to a function to control RAMDoubler (1.0?) or to obtain information. It
looks like registers are used to pass parameters to and from that function.
D0 perhaps holds values 1 to 6 as input and perhaps A0 is used for the
return value.

FUNCTION VMExtensionControl? (selector: Integer; VAR result: LongInt): OSErr;
     Registers on entry   D0: selector code
     Registers on exit    A0: result code
                          D0: error code
     Result codes
       noErr                       0 No error
       invalidSelector?          206 Invalid selector value?
       ???

Values used as selector:
     enum {
     kVMControlType?        = 1,       /* type VM extension: RaM2 */
     kVMControlVersion?     = 2,       /* version VM extension as BCD */
     kVMControl???          = 3,       /* engine version as BCD?: 0x0313 */
     kVMControlMemSize?     = 4,       /* unknown: Get/SetMemorySize? */
     kVMControlMemSize?     = 5,       /* unknown: Get/SetMemorySize? */
     kVMControl???          = 6,       /* unknown */
     kVMContolMaxFunctions? = MAXINT}; /* returns number of valid */
                                       /*  selectors or any other value */
                                       /*  outside the  current 1-6 */
                                       /*  range */

Remember: all this is heresay!!!

Because of all this you can imagine RAM Doubler replaces/installs the
following System Software selectors (and I think it does):
lram, pgsz, ram , vm  , vmbs.

Relabled Macintosh Models
-------------------------
(by Rene Ros;
 Originally based on the Mac Models List by J.D. Sterling Babcock.
 Since Summer 1995 based on MacFacts by Apple Computer Inc.)

The Performa models usually (there are some exceptions) return a  machine
ID# for the model they are based on. The table below lists several models
which are simply relabled and the hardware model they are based on.

===========================================================================
Relabled Machines
===========================================================================
Relabled Model          Hardware Model               Note
Name                    Constant
---------------------------------------------------------------------------
Macintosh ED            gestaltMacPlus               sold in Netherlands?,
                                                     512K with Mac SE case
                                                     color
Macintosh LC III+       gestaltPerforma460
Performa 200            gestaltClassicII
Performa 250            gestaltMacColorClassic       sold in Australia and
                                                     Britain
Performa 275            gestaltMacColorClassic
Performa 400            gestaltMacLCII
Performa 405            gestaltMacLCII
Performa 410            gestaltMacLCII
Performa 430            gestaltMacLCII
Performa 450            gestaltMacLCIII
Performa 460                                         not relabeled, own ID
Performa 466            gestaltPerforma460
Performa 467            gestaltPerforma460
Performa 475            gestaltMacLC475
Performa 476            gestaltMacLC475
Performa 520            gestaltMacLC520
Performa 550            gestaltMacLC550
Performa 560            gestaltMacLC550
Performa 575            gestaltMacLC575
Performa 577            gestaltMacLC575
Performa 578            gestaltMacLC575
Performa 580            gestaltMacLC580
Performa 588            gestaltMacLC580
Performa 600                                         not relabeled, own ID
Performa 630            gestaltMac630
Performa 631            gestaltMac630
Performa 635            gestaltMac630
Performa 636            gestaltMac630
Performa 637            gestaltMac630
Performa 638            gestaltMac630
Performa 640            gestaltMac630
Performa 5200           gestaltPowerMac5200_75
Performa 5210           gestaltPowerMac5200_75
Performa 5215           gestaltPowerMac5200_75
Performa 5220           gestaltPowerMac5200_75
Performa 6110           gestaltPowerMac6100_60
Performa 6112           gestaltPowerMac6100_60
Performa 6115           gestaltPowerMac6100_60
Performa 6116           gestaltPowerMac6100_60
Performa 6117           gestaltPowerMac6100_60
Performa 6118           gestaltPowerMac6100_60
Performa 6200           gestaltPowerMac6200_75
Performa 6216           gestaltPowerMac6200_75
Performa 6218           gestaltPowerMac6200_75
Performa 6220           gestaltPowerMac6200_75
Performa 6230           gestaltPowerMac6200_75
Performa 6300           gestaltPowerMac6200_75
PowerMac 6100/60AV      gestaltPowerMac6100_60
PowerMac 7100/66AV      gestaltPowerMac7100_66
PowerMac 8100/80AV      gestaltPowerMac8100_80
PowerMac WGS 6150/60    gestaltPowerMac6100_60
PowerMac WGS 6150/66    gestaltPowerMac6100_66
PowerMac WGS 8150/80    gestaltPowerMac8100_80
PowerMac WGS 8150/110   gestaltPowerMac8100_110
Quadra 660AV            gestaltMacCentris660AV
Workgroup Server 60     gestaltMacCentris610
Workgroup Server 80     gestaltMacQuadra800
Workgroup Server 95     gestaltQuadra950
Workgroup Server 95+    gestaltQuadra950
---------------------------------------------------------------------------

General Info
============
The following sections provide general information needed or useful in
relation to the Gestalt Manager.

System Managers
---------------
Listed below is a table with the different software components of the
System Software with their related selectors. The selectors listed with
this table are included in the (known) 'Apple System Software' and
'Apple Additional Software' chapters.
It provides a cross-reference to selectors and a starting point into other
documentation (Inside Macintosh).
With System Software versions before 6.0.4 (and Gestalt) you may need to
use TrapAvailable to determine the presence of certain system parts.

===========================================================================
System Software components and their selectors
===========================================================================
Manager                        Determine presence/features by using:
---------------------------------------------------------------------------
8*24 Graphics Card             gc24
A/UX                           a/ux
ADB Mgr                        ???
Alias Mgr                      alis
AOCE Utilities                 ???
Apple Event Mgr                evnt
Apple Guide                    help, reno
Apple Photo Access             kpcd
Apple Remote Access            arb , strm
AppleScript                    ascr, ascv
AppleTalk Mgr                  atkv, atlk
AppleTalk Phase 2              atkv >= 53
At Ease                        kids
ATA Manager? (the SCSI Mgr equiv. for IDE)
                               TrapAvailable(0xAAF1)
Audio CD Access                aucd
Authentication Mgr             ???
Catalog Mgr                    ???
CD-ROM Software                see:
                                  Apple Photo Access
                                  Audio CD Access
                                  Foreign File Access
                                  High Sierra File Access
                                  ISO 9660 File Access
CloseView                      BSDa
Code Fragment Mgr              cfrg
Collection Mgr                 cltn
Color Mgr                      ???
Color Picker Mgr               cpkr
ColorSync Utilities            cmta, cmtc
Communications Toolbox         ctbm, ctbu, ctbv
                               see also:
                                  Communications Resource Mgr
                                  Connection Mgr
                                  Telephone Mgr
                                  Terminal Mgr
Communications Resource Mgr    crm
Component Mgr                  cpnt
Compression Mgr                icmp
Connection Mgr                 conn
Control Mgr                    no need to check
Control Strip                  sdev, csvr
Cuda Dispatch Mgr              cuda? (for more info:
                                      Developer Note 'Mac LC630 &
                                      Quadra 630' and SAA7194/6 Philips
                                      Desktop Video Handbook)
Cursor Device Manager          TrapAvailable(0xAADB)
Cursor Utilities               qd >= gestalt32BitQD
Data Access Mgr                dbac
Date, Time and Measurement Utilities
                               ???
Debugger                       debugger dependant, see also MacsBug
Deferred Task Mgr              no need to check?
Desk Manager                   no need to check
Desktop Animation Mgr (Copland?)
                               danm
Desktop Mgr                    PBHGetVolParms fills GetVolParmsInfoBuffer.
                               Test for the bHasDesktopMgr bit (12) of the
                               vMAttrib field for all volumes.
Device Mgr                     no need to check
Dialog Mgr                     ditl, TrapAvailable(_DialogMgrDispatch)
Dictionary Mgr                 dict
Digital Signatures Mgr         dsig
Disk Initialization Mgr        fs
Display Mgr                    dplv, dply
Docking Mgr                    ???
Drag Manager                   drag
Easy Access                    eajt, easy
Edition Mgr                    edtn
Event Mgr                      no need to check?
Exception Mgr                  no need to check?
File Mgr                       ???, fs
File System Mgr                fs  , fsm
File Transfer Mgr              fxfr
Finder                         fndr
FindFolder function            fold
Flagship                       flag
Font Mgr                       font
Foreign File Access            ufox
Gestalt Mgr                    gval, tabl, vers, TrapAvailable(_Gestalt),
                               TrapAvailable(_GestaltValueDispatch)
Graphics Worlds                (qd > gestaltOriginalQD and qd < gestalt8BitQD)
                                or (qd >=gestalt32BitQD)
Help Mgr                       help
High Sierra File Access        hscd
Icon Utilities                 icon, TrapAvailable(_IconDispatch)
Interprogram Messaging Mgr     ???
ISO 9660 File Access           hscd, iscd
LAP Mgr                        atlk >= 53
List Mgr                       no need to check ?
MacsBug                        See PT 535 - MacsBug Q&As TechNote
MacTCP                         mtcp
Mathematical and Logical Utilities
                               no need to check?
Memory Mgr                     addr, cash, lram, os
                               see also: Modern Memory Mgr
Memory Management Utilities    addr, TrapAvailable(_HWPriv) ?
Menu Mgr                       no need to check
Message Mgr                    mess
MIDI Mgr                       ???
Mixed Mode Mgr                 mixd
Modern Memory Mgr              see: Modern Memory Manager section of the
                                    Report chapter.
Movie Toolbox                  ???
Name Registry                  nreg
Navigation Services (Copland?) nvsv
Notification Mgr               nmgr, TrapAvailable(_NMInstall) with System
                                     before 6.0.4 ?
OCE Toolbox                    ocet, oceu
Open Firmware                  opfw
OpenDoc (CALib)                calb
OS Utilities                   depends on call
OSA                            Use Component Mgr to check for Generic
                               Scripting Component
Package Mgr                    no need to check
Parameter RAM Utilities        no need to check?
PC Card Manager                pccd, TrapAvailable(_PCCardDispatch) [0xAAF0]
PC Exchange                    pcxg
Picture Utilities              sysv >= 0x0700
Popup CDEF                     pop!
Power Mgr                      powr
PowerTalk                      see:
                                  Digital Signatures Mgr,
                                  OCE Toolbox,
                                  S&F Server,
                                  SDP Find,
                                  SDP Prompt,
                                  SDP Standard Directory,
                                  SMP Mailer,
                                  SMP Sendletter
PPC Toolbox                    ppc
Printing Manager               no need to check?
Process Mgr                    os
Queue Utilities                ???
QuickDraw                      qd  , qdrw
QuickDraw 3D                   qd3d, q3vc, q3v
QuickDraw GX                   qdgx
QuickDraw GX Graphics          gfxa, grfx
QuickDraw GX Printing Mgr      pmgr
QuickTime                      qtim, qtrs
Realtime Mgr                   rtmr
Resource Mgr                   rsrc
S&F Server (PowerTalk)         see OCE Toolbox
SANE (OmegaSANE)               ???
Scrap Mgr                      scra
Script Mgr                     scr#, scri, TrapAvailable(_ScriptUtil)
SCSI Mgr                       scsi
SDP Find (PowerTalk)           dfnd
SDP Prompt (PowerTalk)         prpv
SDP Standard Directory (PowerTalk)
                               sdvr
Segment Mgr                    no need to check
Server control calls           TrapAvailable(ServerDispatch) [0xA094]
Shared Library Mgr             aslm, slmp
Shutdown Mgr                   TrapAvailable(_Shutdown) ?, pwky
Slot Mgr                       nubs, slot, slt1, sltc
SMP Mailer (PowerTalk)         malr
SMP Sendletter (PowerTalk)     spsl
Sound Mgr                      snd , snhw, TrapAvailable(_SoundDispatch)
Sound Input Mgr                snd
Speech Mgr                     ttsc
Speech Recognition             srta, srtb
Standard Catalog Package       ???
Standard File Package          stdf
Standard Mail Package          ???
Standard NBP                   nlup
Start Mgr                      ???
System Toolbox (hardware)
   coprocessor                 fpu
   disks                       intd
   keyboard                    kbd
   machine                     mach
   misc. ICs                   hdwr, mmu , rbv , sccr, sccw, ser ,
                               via1, via2
   processor                   cput, proc, sysa
   RAM ICs                     ram , prty
   ROM ICs                     rom , romv
   trackpad                    tpad
System Toolbox (software)      lmem, micn, misc, os  , ostt, osyv,
                               sysv, tbtt, xttt
Telephone Mgr                  tele
Terminal Mgr                   term
Text Services Mgr              tsma, tsmv
Text Services Manager for TextEdit
                               tmTE, tmTV
Text Utilities                 depends on call
TextEdit                       te  , teat
Thread Mgr                     thds
Time Mgr                       tmgr
Toolbox Utilities              depends on call
Translation Mgr                xlat
TV & Video                     mtv2, tv
Unicode Converter (Copland?)   unic
Vertical Retrace Mgr           no need to check
Video                          see: TV & Video
Virtual Memory Mgr             pgsz, vm
Window Mgr (Copland?)          wind
Workstation Management Agent   wma.
WorldScript                    scri >= 0x0710, ws 1
XTND Technology                XTND
---------------------------------------------------------------------------

Gestalt Problems
----------------
This section lists all known problems related to the Gestalt selectors.
Each problem is also listed with each of the entries in the selector
chapters above. The table below provides an overview.

===========================================================================
Overview Gestalt selector problems
===========================================================================
Software                 Code  Problem                           Status
---------------------------------------------------------------------------
Apple Photo Access ext   kpcd  always returns 0xFFFFFFF7         R unclear
AppleScript ext          ascv  different formats version         R problem?
AppleTalk                atkv  majorRev of version in hex          problem?
Color Picker ext         cpkr  incorrect return values?            problem?
Control Strip cp         sdev  two symbolic names defined          problem?
Desktop Printer Ext      pxtn  v1.0 doesn't install selector?      problem?
Easy Access cp           easy  incorrect return values           C unknown
Icon Utilities code      icon  not installed                     C SYS 712?
File System Manager      fsm   not installed with System 7.5       UPD 1.0
Link Tool Mgr 2.0 ext    ltma  incorrect version value?          R problem?
PowerTalk ext/Control Strip 1.0 cp
                         sdvr  same selector for both?           C CS 1.1?>
QuickDraw 3D             qd3d  selector function crashes?          problem?
SAM ext                  LLSM  selector function crashes           4.0.1>
Speech Manager ext       ttsc  With Sys 7.5.1 PPC Glue bit set
                                on 68K machines                    unclear
Speech Recognition ext   srta, srtb
                               installed even if no SR possible  R unclear
System (enablers)        *ALL* Gestalt Mgr with System 7.1.2     C SYS 7.5>
                         *ALL* Minimal System (Disk Tools) may
                                lie about managers present       C unknown
                         *ALL CTB*
                               Comm. TB for System 6 doesn't
                                install any of the CTB selectors C never
                         alis  QT part. installs but no selector C ok
                         cash  never installed?                    unclear
                         cput  incorrect values 68K header file  C fixed
                               system 7.5? returns incorrect
                                values for 68K                   C unknown
                         ctbv  PM returned 1.1 while ROM has 1.0 C SU 3.0 >
                         fs    QT part. installs but no selector C ok
                         intd  bit 1 (disk spon up) not set      R SYS751>?
                         kbd   Adjustable Keyboard incorrect     C SU 2.0 >
                               not installed on PM7100 (7.1.2)     unclear
                         mach  duplicate numbers for PPC upgrade
                                cards and new PPC PowerBooks       problem?
                         mixd  'gestaltMixedModeVersion' is
                                incorrect name                   C fixed
                         qdrw  HasColor set on B/W machines (7.0)C unknown
                         rsrc  PartialRsrcs not set with 7.0     C 7.1 >
                         sltc  No information on IIsi slot       C never?
                         sysv  KanjiTalk 6.0.7 incorrect return value
                                                                 C sysvINIT
                               System 6.0.8 returns 0x0607         never
                               System 7.1.2/PPC card returns 0710  unclear
                         tv    Bits 3 and 4 incorrectly set        unclear
                               Bit 5 incorrectly clear             unclear
System/Apple Event ext   evnt  constants overlap header files    C fixed
Shared Libary Manager    aslm  function of early versions crash    fixed
Transporter ext          TRNS  calling function causes interface
                                problems
Virex cp?                VrkS  triggers quickscan feature only
                                by calling function
---------------------------------------------------------------------------
R       = unconfirmed but known to be reported to Apple
C       = confirmed
fixed   = problem is fixed, see selector entry for more information
ok      = meant to work this way...
unclear = unclear if it will ever be fixed
unknown = unknown when it will be fixed

One general Gestalt problem is that NewGestalt calls StripAddress on the
procptr passed to it, not on a local copy, so the stripping becomes
permanent. This is fixed by System 7.5.1.

Inside Macintosh Operating System Utilities says (on page 1-37) the A0 and
D0 registers are used to pass/return data to/from the the selector function.
This is incorrect since the function is Pascal stack based.
(Nobu Toge, Steve Ko)

History
-------
This section contains a short overview about the history of the Gestalt
Manager and its predecessors.


**ENVIRONS**

     PROCEDURE Environs (VAR rom,machine: INTEGER);

With the introduction of the Macintosh the system routine 'Environs' was
introduced. It allowed to obtain two pieces of information: the ROM version
and a value to indicate the machinetype. This "ROM oriented" way soon
appeared to be insufficient when the range of Macintosh hardware and
software became more diverse.


**SYSENVIRONS**

     FUNCTION SysEnvirons (versionRequested: INTEGER;
                           VAR theWorld: SysEnvRec): OSErr;

With System 4.1 a new system routine was introduced which allowed the
programmer to obtain more information about the current configuration.
Upon completion SysEnvirons filled the SysEnvRec with the information.
This was however an "all-or-nothing" situation, it was not possible to
obtain just one piece of information.
To allow for larger system environment records with more information one
needed to specify the version number of the system environment record. The
last version, introduced with System 6, was version 2 which had nine fields.


**GESTALT**

     FUNCTION Gestalt (code: LONGINT; VAR feature: LONGINT): OSErr;

You may wonder how one can be so stupid to list the Gestalt routine wrong...
However, this is how the Gestalt routine was presented to developers in
the Preliminairy Developer Note regarding System 7 in 1989. It was
originally written in 1988.
There was no selector of type OSType as we known it today. Instead a list
of numerical constants was used, like:

     zVersion    = $1;   { Gestalt Version }
     zMachType   = $100; { machine type }
     zSystemVers = $101; { system file version }

and nine others.
But the principle used with todays Gestalt routine was there: request one
specific piece of information and you'll get it. Nothing more and nothing
less. Back then it wasn't the Gestalt Manager since there was only one
routine. Both the NewGestalt and the ReplaceGestalt did not exist.
In June 1992 (released in February 1993?) three new functions were added
to the Gestalt Manager: NewGestaltValue, ReplaceGestaltValue,
DeleteGestaltValue and SetGestaltValue.

Abbreviations
-------------
A/UX     - Apple UNIX
ADB      - Apple Desktop Bus
AMU      - Apple Memory Unit?
ARBus    - Apple RISC Bus
ARTA     - Apple Real Time Architecture
AS       - AppleShare
ASC      - Apple Sound Chip
ASCII    - American Standard Code for Information Interchange
ASIC     - Application Specific Integrated Circuit
ASLM     - Apple Shared Library Manager
ATA      - ??? (ATA Mgr, for IDE drive support)
AURP     - AppleTalk Update-based Routing Protocol
AWAC     - Audio Waveform Amplifier and Converter
BIOS     - Basic I/O System
Caboose  - processor that manages the keyswitch, system power,
           the real-time clock, and parameter RAM
CDEF     - Control DEFinition (code resource)
CFM      - Code Fragment Manager
CHRP     - Common Hardware Reference Platform
CISC     - Complex Instruction Set Computer (compare with RISC)
CLUT/DAC - color look-up table and digital-to-analog converter IC
Combo    - chip, combines the functions of the SCC and the SCSI controller
CPU      - Central Processing Unit
Cuda     - ASIC that implements the ADB, PRAM and Soft Power on more
           recent Macs. Apperantly this IC will (or already does?) emulate
           the IBM keyboard controller also.
Cyclops  - IC to control remote control receiver.
DAFB     - Direct Access Frame Buffer
DAV      - Digital Audio Video (connector)
DDC      - Display Driver Chip
DESC     - Digitale Video Decoder and Scaler
DFAC     - Digitally Filtered Audio Chip
DITL     - Dialog ITems List (resource)
DLL      - Dynamically Linkable Library or
           Driver Loader Library
DMA      - Direct Memory Access
DN       - Developer Note
DOS      - Disk Operating System (to run a computer???)
DRAM     - Dynamic RAM
DSP      - Digital Signal Processor
EASC     - Enhanced Apple Sound Chip
FAT      - File Allocation Table?
FMC      - Fitch Memory Controller
FPU      - Floating Point Unit
GDEF     - Gestalt DEFinition (code resource)
GPi      - General Purpose Input
IDE      - Integrated Device Electronics
IIC      - Inter-Integrated Circuit, standard bus for talking to TV related
           chips using a 3-wire signal.
IM       - Inside Macintosh
IOP      - Input/Output Processor
IWM      - Integrated Woz Machine
Jaws     - ???
JDB      - Junction Data Bus
JMC      - Jaws Memory Controller
MacOS    - Macintosh Operating System
MCU      - Memory Control Unit
MAE      - Macintosh Application Environment (Mac system on UNIX RISC)
MEO      - Macintosh Easy Open
MESH     - Macintosh Enhanced SCSI Hardware
MMU      - Memory Management Unit
NBP      - Name Binding Protocol
NTSC     - National Television Standards Comittee
           (standard broadcast TV in North America and Japan)
NVRAM    - non-volatile RAM
OCE      - Open Colloboration Environment
OMC      - Orwell Memory Controller
OS       - Operating System
OSA      - Open Scripting Architecture:
           OSA is the Open Scripting Architecture. It is the layer upon
           which all scripting languages sit and the method by which
           applications call scripts. (Jon Pugh)
OSL      - Object Support Library
OSS      - Operating System Support chip
PAL      - Phase Alternating Line system
           (standard broadcast TV in most of Europe, South America, and
            southern Asia)
PB       - PowerBook
PCI      - Peripheral Component Interconnect
PCMCIA   - Personal Computer Memory Card International Association
PDS      - Processor-Direct Slot
PGC      - Parity Generator Chip
PMMU     - Paged Memory Management Unit
PSRAM    - Pseudo Static RAM
PPC      - Process-to-Process Communication, also:
           PowerPC
PRAM     - Parameter RAM
ProDOS   - Professional Disk Operating System? (OS for the Apple ][)
PWM      - Pulse-Width Modulated?
QD       - QuickDraw
RAM      - Random Access Memory (see DRAM & SRAM, compare ROM)
RAMDAC   - Random Access Memory, Digital/Analog Converter
RBV      - RAM-Based Video
RISC     - Reduced Instruction Set Computer (compare with CISC)
ROM      - Read Only Memory
RSB      - Ram Based Sound
RTC chip - Real-Time Clock chip
RPU      - Random Parity Unit
SANE     - Standard Apple Numerics Environment
SCC      - Serial Communications Controller
SCSI     - Small Computer System Interface
SDP      - Standard Directory Package
SECAM    - standard broadcast TV in France and the former Soviet
SIMM     - Single In-line Memory Module
SMP      - Standard Mailer Package or
           Symmetric MultiProcessor
SOM      - System Object Model
Sonic    - chip for built-in Ethernet
Sporty   - a custom IC that provides sound output amplification functions
SRAM     - Static RAM
SWIM     - Super-Wozniak Integrated Machine
TCP/IP   - Transmission Control Protocol/Internet Protocol
TE       - TextEdit (32Kb limited built-in text-engine)
TN       - Technical Note
TTS      - Text-To-Speech
Valkyrie - IC containing the video display control
VDAC     - Video Digital to Analog Converter
VIA      - Versatile Interface Adapter
VM       - Virtual Memory
VRAM     - Video RAM
YANCC    - Yet Another NuBus Controller Chip

Sources
-------
A    Apple Computer, Inc.
AD    Documentation & Magazines
AD01   MacTCP Programmer's Guide
AD02   AppleTalk Remote Access API External Reference Specification
AD03   Macintosh Easy Open programmer's docs
AD04   Thread Manager 1.1 and 2.0 documentation
AD05   Drag Manager Programmer's Guide
AD06   Sound Manager Tech Note on BookMark CD 16
AD07   D e v e l o p 17, p. 123
AD08   MAE Compatibility Hints
AD09   Color Matching documentation on ETO 14 and BookMark 18
AD10   OS Compatibility doc on WWDC 1994 CD
AD11   IM PPC System Software
AD12   IM OS Utilities
AD13   D e v e l o p 19, p. 105
AD14   File System Manager Guide, Sep. 1994
AD15   Apple Remote Access API, part of Mac OS SDK
AD16   Apple Guide Authoring Kit
AD17   IM Advanced Color Imaging (Draft)
AD18   Apple Tech Info Library (http://www.info.apple.com/til.html)
AD19   Macintosh Programmer's Toolbox Assistant (Online Reference)
AD20   IM Sound
AD21   Preliminary Copland Headers (WWDC 1995)
AD22   Copland Technical Overview (Draft)
AD23   Developer Note Workgroup Server 9150
AD24   PCMCIA API Manual
AD25   Developer Note Macintosh PowerBook 190
AD26   Developer Note Macintosh PowerBook 5300 Computer
AD27   Developer Note Macintosh PowerBook 2300c
AD28   Developer Note Macintosh PowerBook Processor Card Upgrade Kit
AD29   IM Files Errata. February 1995/Rev. June 1995
AD30   D e v e l o p 24, p. ???

Inside Macintosh can be found at:
http://www.info.apple.com/dev/insidemac.html

Sample Code can be found at:
http://www.info.apple.com/dev/sc.html

D e v e l o p Magazine can be found at:
http://www.info.apple.com/dev/develop.html

AS    Source code & header files
AS01   QuickTime ImageCompression source files
AS02   CommToolbox 1.1 source files
AS03   MPW Interface files on Bookmark CD 14
AS04   GestaltEqu header file on ETO 12
AS05   GestaltEqu header file on ETO 13
AS06   GestaltEqu header file on BookMark CD 17
AS07   TSMTE header file on BookMark CD 17
AS08   AppleScript header file on ETO 14
AS09   Drag header file on ETO 14
AS10   XTNDInterface header file on ETO 14
AS11   ControlStrip header file on BookMark CD 19
AS12   AppleGuide header file on BookMark CD 18
AS13   Macintosh on RISC SDK (also on CodeWarrior CD)
AS14   Gestalt header file as part of Universal Interfaces 2.0a1
AS15   GestaltEqu header file for ETO 16 (on CodeWarrior 5 CD)
AS16   PPCToolbox.p header file on CodeWarrior 5 CD
AS17   Several header files on ETO 16
AS18   Open Transport Client Note on the Mac OS SDK #2 CD
AS19   Gestalt.h header file on WWDC Presentations 1995 CD
AS20   Gestalt.h header file on ETO 18

AT    Technical Notes
AT01   TN M.OV.GestaltSysenvirons (OV 16), May 1987/Rev. Sep. 1995
AT02   TN M.NW.AppleTalk2 (NW 13), Feb.1992
AT03   TN M.DV.CD-ROMDriver (DV 22), May 1993
AT04   TN M.HW.SCSI.Q&As (HW 540), Oct. 1990
AT05   TN M.TX.TextServicesMgr.Q&As (TE 531), May 1993
AT06   TN OS 05 - System Update 3.0, July 1993/Rev. May 1994
AT07   TN M.DV.CuriousSCSI, May 1994
AT08   TN OS 06 - Control Strip Modules, July 1994/Rev. Sep. 1994
AT09   TN M.ME.VMMemoryMapping (TN-Memory), July 1987/Rev. March 1988
AT10   TN M.PT.A/UX.Q&As, Oct. 1990/Rev. Sep. 1993
AT11   TN M.QD.ColorQD Q&As, April 1990
AT12   TN OS 07 - System 7.5 Update 1.0, February 1995

The Technical Notes can be found at:
http://www.info.apple.com/dev/technotes/Main.html

S    Symantec Corp.
S01    THINK Pascal 4.0 interface files
S02    THINK C GestaltGlue source files
S03    THINK Reference 1.0 and 2.0

M    Miscellaneous sources
M01    Gestalt DA 0.4 1990 (Carl C.Hewitt)
M02    Gestalt dcmd 1.0 (Eric Simenel, Apple Computer France)
M03    sysvINIT source files (Apple Computer Japan, Inc.)
M04    TMON Professional Reference Manual, p.192 (ICOM Simulations)
M05    AfterDarkGestalt.h file (Berkeley Systems, Inc.)
M06    SoftwareFPU Programmer Info (John Neil & Associates)
M07    GestaltZeigen (Kevin B. Hardman)

Definitions and Formats
=======================
This chapter explains where the word 'Gestalt' comes from, a few things
are defined and it explains how each selector code entry looks like.

Use in Language
---------------

**WEBSTER'S DICTIONARY**
ge.stalt \g<e>-'s(h)t<a:>lt, -'s(h)t<o.>lt\ n, pl ge.stalt.en
\-<\e>n\ or gestalts (1922)
  [G, lit., shape, form]
  :a structure, configuration, or pattern of physical, biological, or
  psychological phenomena so integrated as to constitute a functional unit
  with properties not derivable by summation of its parts.

  (Try this one: http://www.fwi.uva.nl/htbin/webster.cgi?gestalt)

**GERMAN-DUTCH DICTIONARY**
Gestalt w [-en]
  stature, figure, form; Ritter von der Traurigen -, knight of the
  sorrowful figure.

Definitions
-----------

**APPLE SOFTWARE**
This category includes all selectors installed by software published by
Apple Computer, Inc.
Inside Macintosh says this about them:
     "Apple reserves for its own use all four-character sequences
      consisting solely of lowercase letters and non alphabetic ASCII
      characters".
It includes all selectors of the next two categories:

**APPLE SYSTEM SOFTWARE**
This category includes all selectors installed by System Software from
Apple Computer, Inc.

**APPLE ADDITIONAL SOFTWARE**
These are selectors installed by additional, non-system, software from
Apple Computer, Inc.

**THIRD PARTIES SOFTWARE**
These are selectors installed by software from parties other than Apple
Computer, Inc.
Inside Macintosh says about these:
     "If you have registered a creator string with Apple, you are
      strongly encouraged to use that sequence as your selector code".
This type of selectors is included in this list with the motto "If you
don't know they are there, you can't do anything with them".
Especially the Third Party selectors may change with every new release and
are therefore only listed in the 'known selectors' part when the author has
described the structure in the documentation or by email to me. These
selectors don't have a high priority but when possible I want to know at
least which software installs it to exclude it as a possible
"Apple selector".
Some people at Apple also differentiate between commercial developers and
others, as being "third" and "fourth" parties respectively. But with this
list this is not the case.

Format Selector Entry
---------------------
Format used to display information about each selector:

selector_code (Software_name & type [since_version], by company/author)
     constant_name (selector code in hex)
     description

     enum {
     #define selectorconstant 'selector_code'
     constant_1 = value1,  /* remark &ref.number_to_source */
     constant_n = valuen}; /* remark &ref.number_to_source */

     NOTE and/or WARNING:

Where the type is one of:
app  application (APPL)
cp   control panel (cdev)
enbl enabler
ext  extension (INIT/appe/RDEV etc.)

Example:

COLA (Sugarwater ext [1.0] by John Sculley)
     gestaltSugarwaterVersion
     Returns version of Sugarwater as NumVersion.

     enum {
     #define gestaltSugarwaterVersion 'COLA' /* &AB01 */
     gestaltSugarwaterLightVersion = 0x0200}; /* first light version */

     WARNING: This example is fictitious.

     NOTE:
     Sugarwater? See the book 'West of Eden, The End of Innocence at
     Apple' by Frank Rose.

Most selectors are listed as four characters, if there are only two or
three characters displayed the remainder are spaces (or it's a typo!).
Diacritical characters are shown in the most logical normal character and
at the end of the entry a note is included about which key-combination to
press with a normal International system and US keyboard layout to get the
required diacritical character and also listed is its hexadecimal code.
When 'INF' is at the end of the first line it means it is an informational
selector, all others are environmental selectors.
The source reference number may also be used in other places than indicated
above. It then applies to other parts of the entry or to the whole entry.
A single question mark indicates an uncertainty regarding the information
in front of the question mark. Three question marks indicate complete
absence of the information.
Some symbolic names may not originate from official publications.

Symbolic Names Suffixes
-----------------------
The last characters of the symbolic names form a suffix which indicates
the type of the returned value. Below is a table which lists the different
types of suffix and their meaning.

===========================================================================
Symbolic Names Suffixes
===========================================================================
Suffix                   Meaning
---------------------------------------------------------------------------
Addr                     Value is an address, i.e. to the base address of
                         a memory-mapped device or to a function in
                         memory.
Attr                     Value is a range of 32 bits (0 is the least
                         significant bit), must compare with list of
                         constants and use BitTst or similair. Sometimes
                         it is a bitmask, then use BitAnd.
Count                    Value is a number indicating how many of the
                         indicated type exist.
Icon                     Value is the resource ID of an icon.
Size                     Value is a size, usually in bytes.
Table                    Value is the base address of a table.
Type                     Value is an index to map to a version or name.
Version                  Value is a version number. See the section
                         'Format Version Numbers' below, for a list of
                         different formats of version numbers.
<none>                   If there is no suffix like the ones above, the
                         presence of the selector only implies the
                         software which installed the selector is present.
                         The returned value is then private to the
                         installee.
---------------------------------------------------------------------------

Format Version Numbers
----------------------
**BCD (Binary Coded Decimal)**
     0x0402 means 4.0.2. Usually the lower two bytes of the response.

**INTEGER**
     The decimal representation of the returned value in the low-byte is
     the version.

**Double BCD** (my own fantasy name..., RR)
     0x00010108 means 1.1.8.

**NumVersion**
     The format of the LongInt response can be coerced into type NumVersion,
     which is the same format as used for the 'vers' resource type.

     type
      NumVersion = packed record
       case INTEGER of
        0: (majorRev: SignedByte;  {1st part of version number in BCD}
            minorRev: 0..9;        {2nd part is 1 nibble in BCD}
            bugFixRev: 0..9;       {3rd part is 1 nibble in BCD}
            stage: SignedByte;     {stage code: dev, alpha, beta, final}
            nonRelRev: SignedByte);{revision level of non-released version}
        1: (version: LONGINT);     {to use all 4 fields at one time}
       end;

     stage is one of: 0x20 = development
                      0x40 = alpha
                      0x60 = beta
                      0x80 = final

About this list
===============
The Gestalt Manager is a collection of system routines which allows
applications to test for the availability of software and hardware. Because
of the increasing number of different software and hardware configurations,
this is getting an important issue. It probably already is and known by the
term 'compatibility'.
The Gestalt function allows applications to obtain information about the
current configuration. Selectors are used to refer to certain information.
A selector is of type OSType (a four byte value) and usually contain four
ASCII characters. For example: the selector 'sysv' causes the version of
the current system is returned. Other functions, NewGestalt and
ReplaceGestalt, allow programmers to install their own Gestalt selectors.
Programmers need to know these selectors beforehand to be able to request
and interpret the value returned by the Gestalt function.
See for more detailed information on how to use the Gestalt Manager
routines Inside Macintosh part VI (old series). The new Inside
Macintosh: Operating System Utilities replaces IM VI.
The Driver Gestalt calls (status calls to device drivers) are not covered
by this list.
When you already have one or more of the new IM issues you may be a bit
disappointed. I was, because of the very minimal information provided
regarding the availability of the system routines. Of most routines you
will find no information on how to test their availability.

This Gestalt Selectors List intends to list all known selectors, but in
reality this means it lists all selectors known to the editor.
I would like to see this list to be a combined effort by different persons
who have together access to a wide area of information.
This list may contain (educated?) guesses and perhaps even false
information, so no guarantee is made about the contents.
You may use this information freely (see Legal Stuff section below), but
when you find information not included with this list; please tell me. If
you have additions, corrections, comments, suggestions, news about
available software, etc., mail it me. Please, also mention the source you
used, if any.
You can send contributions, remarks, etc. (using the form included below)
to this email address:
    [e-mail]
If you want to remain anonymous, please mention this and it will be taken
care of.
I don't have all the documentation or knowledge and I don't want to, and
I'am certainly not Mr.Gestalt.

Availability
------------
If you downloaded this list from CompuServe, a BBS, or any other service,
you will notice some strange things like 'FTP-sites' which have to do with
the fact that this list originates from the Internet.
Although the GSL can be found on most networks outside the Internet, you
may be able to access the Internet also from AppleLink, AOL, CompuServe and
eWorld. Contact your network provider for information on how to access the
Internet or how to send email to an Internet address.

This list is available in the following ways:

**INTERNET**

_FINGER_
Using Finger to obtain the latest version is no longer possible.

_FTP-SITES_

INFO-MAC ARCHIVES
Every minor and major version is submitted to the Info-Mac archives:

ftp://sumex-aim.stanford.edu/info-mac/dev/info/gestalt-selectors-*.hqx

It is also available on its mirror sites. A list of the mirror sites can
be found at:

http://www.bio.vu.nl/home/rgaros/mirror-list.html

Contact: Info-Mac Moderator ([e-mail])


_USENET_
This list is too large to post to any of the subgroups of the
comp.sys.mac.programmer (c.s.m.p.) newsgroups. Therefore, since version 2.2,
only an announcement about the release of a new version is posted to these
newsgroups:
    news:comp.sys.mac.programmer.codewarrior
    news:comp.sys.mac.programmer.help
    news:comp.sys.mac.programmer.info
    news:comp.sys.mac.programmer.misc
    news:comp.sys.mac.programmer.tools

_WWW_

APPLE COMPUTER INC., U.S.A.
The GSL can be found on the Apple WWW server in

http://www.info.apple.com/cgi-bin/lister-pl?Apple.Support.Area/Developer_Services/Tool_Chest/OS_Utilities

Which is mirrored on the FTP site of Apple Europe at

ftp://ftp.info.euro.apple.com/Apple.Support.Area/Developer_Services/Tool_Chest/OS_Utilities/

Contact: [e-mail]

NORTHWESTERN UNIVERSITY, U.S.A.
The GSL can be found at the Northwestern University WWW server, together
with other Macintosh FAQs:

http://www.astro.nwu.edu/lentz/mac/faqs/source/gestalt.html

Contact: Robert Lentz ([e-mail])

VRIJE UNIVERSITEIT, NL
The GSL can be found behind the home page of the editor at the Vrije
Universiteit's Faculty of Biology WWW server:

http://www.bio.vu.nl/home/rgaros/

or directly at:

http://www.bio.vu.nl/home/rgaros/gestalt/

Contact: Rene G.A. Ros ([e-mail])

**AMERICA ONLINE (AOL)**

You can find the GSL on AOL in the "MDV/Documents and Proposals" directory.

Contact: none, who wants to upload it to AOL?

**APPLELINK**

You can find the GSL on AppleLink in this location:

Developer Support:Developer Services:Tool Chest:OS/Toolbox:

**COMPUSERVE**

Since version 2.0 this list is uploaded to the Macintosh Developers Forum
(MACDEV). Only new minor and major versions will be uploaded once. The GSL
is available in the Tools/Debuggers (13) section. Or use the Internet
locations by using GO INTERNET.

**EWORLD**

You can find the GSL on eWorld in this location:

Apple Developer Services:Tool Chest:OS/Toolbox:

The shortcut to Apple Developer Services is 'devservice'.

**GENERAL**

_CD-ROM_or_BBS_
Because of permissions I granted you may get this list from a CD-ROM or via
a BBS from Internet (or any other network) or a CD-ROM. If you do, and the
release was more than two months ago, there is probably already a newer
version.
You can find the GSL on the latest release or upcoming release of these
CD-ROM titles:

Apprentice CD-ROM                    (Celestin Company)
BBS in a BOX CD-ROM                  (Arizona Macintosh Users Group)
Bookmark CD                          (Apple Computer, Inc.)
CodeWarrior CD                       (MetroWerks Corporation)
Developer CD Series, Tool Chest      (Apple Computer, Inc.)
Info-Mac CD-ROM                      (Pacific HiTech, Inc.)
MacHack CD                           (MacTech Magazine)
The Right Stuffed CD-ROM             (Quantum Leap Technologies, Inc.)

_MAILING_LIST_
Every person on the mailing list automatically receives an update by email
whenever there are some changes. If you want to subscribe or unsubscribe to
this mailing list you need to send email to this address:
     [e-mail]
Then put in the subject line either 'subscribe' or 'unsubscribe'.

The mailing list is moderated, which means everybody can email to:
    [e-mail]
But only after approval of the moderator the other subscribers will receive
your posting. This guarantees that no confidential contribution is
distributed before the moderator sees it.
If mail to you bounces eight times you're automatically unsubscribed.

This service is only possible to those who have an account on Internet or
any other network reachable from the Internet (AOL, AppleLink, eWorld,
CompuServe, Fidonet, etc.). I can not provide mailing of printed versions
or on disk by normal surface mail.

_MAIL_ARCHIVE_SERVER_
You can retrieve the latest versions of this list and other software
by sending email to this address:
     [e-mail]
In the subject line you need to enter 'archive' and then put one command
behind it or only 'archive' in the subject line with one or more commands
in the body of your email preceded by the keyword 'archive'. These commands
can be:
     help             to get some help on using the archive server
     ls <dir>         to list the contents of the specified directory
     get <dir>/<file> to have the specified file sent to you by email.
To obtain the abstracts of all files available you can use this command:
     archive get ABSTRACTS

Your actions may be logged.

_PRINTED_
If you want this list printed on paper you may want to try a feature
included with the LaserWriter 8 software. With it you can print four
pages on a single sheet of paper. When you set the page breaks correct,
this produces a very neat, little booklet.

Gestalt Submission Form
-----------------------
You can use this form to report information you found on already included
selectors. But you can also use it to register new Gestalt selector codes.
If you want to register the selector code your software installs, make sure
you registered your code first with Apple Computer, Inc. Also, it is your
good right if you chose to keep the meaning of the response value private.
If so, still register so that others can at least detect your software by
determining if the selector is present.

Software means, in this form, the software which installs the selector
code. Not the whole package, just the extension or control panel (perhaps
application) itself.
The package is the product name in which the software is included and
distributed.
If data is not available or relevant, leave it blank. When the selector
contains non-ASCII characters, please also provide the hexadecimal value.

You can also fill in this form on-line because it is also on the WWW
pages of the GSL: http://www.bio.vu.nl/home/rgaros/gestalt/


Your name:

Your email address:

Your company name:

Do you want to remain anonymous? Yes / No

Software name:

Software type: O application
               O control panel
               O extension (also 'appe')
               O other:

Category:      O Apple System Software
               O Apple Additional Software
               O Apple Software
               O Third Parties Software

Package name:

Author or Company name:

Gestalt Selector:

Constant name:

First version to install selector:

Source of information:

Short description of the returned response:





Additional constant names and values for the response value meaning:





Please email this form to this Internet address: [e-mail]

Acknowledgements
----------------
I want to thank the following persons for their contributions and
support of this list:

===========================================================================
Name                                       Internet Email Address
---------------------------------------------------------------------------
Anonymous contributor(s)                   [e-mail]
Anonymous contributor 'Fig'                [e-mail]
Lonnie R. Abelbeck                         [e-mail]
Daniel Azuma                               [e-mail]
J.D. Sterling Babcock                      [e-mail]
Jeff Baudin, Micromat Computer Systems     [e-mail]
John W. Baxter                             [e-mail]
Martin Bestmann                     [e-mail]
Mason L. Bliss                             [e-mail]
Scott Bronson                              [e-mail]
Jim Browne                                 [e-mail]
Richard Buckle                             [e-mail]
Ivan M Cavero Belaunde                     [e-mail]
John Champion                              [e-mail]
Mike Cohen                                 [e-mail]
Marc Cooperman                             [e-mail]
Paul Cunningham, Teknosys, Inc.            [e-mail]
Jean-Pierre Curcio                         [e-mail]
Mark Dawson                                [e-mail]
Anthony DeRobertis                         [e-mail]
Lawrence D'Oliveiro                        [e-mail]
Alex Dosher (Developer CD Leader), Apple Computer, Inc.
                                           [e-mail]
Dave Falkenburg, Apple Computer Inc.       [e-mail]
Andy Fyfe                                  [e-mail]
Rick Gansler                               [e-mail]
Jason Goldman, CircleDream Software        [e-mail]
M. David Greenspon                         [e-mail]
C.K. Haun                                  [e-mail]
Michael Hecht                              [e-mail]
Robert Hess                                [e-mail]
Bill Hofmann                               [e-mail]
Laurent Humbert                            [e-mail]
Don Johnson, Apple Computer Inc.           (??? via devsupport)
Mark B. Johnson                            [e-mail]
Michael F. Kamprath                        [e-mail]
John Kawakami, MacTech Magazine            [e-mail]
Jonathan Kleid                             [e-mail]
Kenneth Knotts, Power Computing            [e-mail]
Peter Kocourek                             [e-mail]
Steve Ko                                   [e-mail]
Rich Kubota, Apple Computer Inc.           [e-mail]
Roy Leban, Akimbo Systems                  [e-mail]
David B. Lamkins                           [e-mail]
Robert Lentz                               [e-mail]
David Lewis                                [e-mail]
Spencer Low                                [e-mail]
John Mancino, Decision Maker's Software    [e-mail]
Roland Mansson                             [e-mail]
Matsubayashi Kohji                         [e-mail]
William H. Leininger                       [e-mail]
Duane Murphy, Novell Inc.                  [e-mail]
Masatsugu Nagata                           [e-mail]
Fabrizio Oddone                            [e-mail]
Carl R. Osterwald                          [e-mail]
Marco Piovanelli                           [e-mail]
Kees Pols                                  [e-mail]
Francois Pottier                           [e-mail]
Ken Prehoda                                [e-mail]
Jon Pugh                                   [e-mail]
Quinn "The Eskimo!"                        [e-mail]
Dave Radcliffe, Apple Computer Inc.        [e-mail]
Eric-Paul Rebel                            [e-mail]
Thomas Reed                                [e-mail]
Pete Resnick                               [e-mail]
Paul Reznick                               [e-mail]
Alex Rosenberg, Apple Computer Inc.        [e-mail]
Leonard Rosenthol                          [e-mail]
Jeremy Roussak                             [e-mail]
Ray Sanders                                [e-mail]
Eric Schlegel, Microsoft Corporation       [e-mail]
Marc Schrier                               [e-mail]
Mark Simmons                               [e-mail]
Mark Sproul                                [e-mail]
Patrick Stadelmann                    [e-mail]
Brian Stern                                [e-mail]
Zalman Stern                               [e-mail]
Tim Swihart                                [e-mail]
Ilan Szekely                               [e-mail]
Victor Tan                                 [e-mail]
Nobu Toge                                  [e-mail]
Rodrigo Torres, Berkeley Systems           [e-mail]
John Tsombakos                             [e-mail]
Hans Verbrugge                             [e-mail]
Maurice Volaski, Flux Software             [e-mail]
Dave Wallace                               [e-mail]
John Watte                                 [e-mail]
Jos van Wezel                              [e-mail]
Jonathan Wilson                            [e-mail]
Terence Worley, Microsoft Corporation      [e-mail]
Chris Wysocki                              [e-mail]
---------------------------------------------------------------------------

And the members of the Computer Department of the Biology Faculty at the
Vrije Universeit in Amsterdam, The Netherlands for their help and support.
Also special thanks to Marco Piovanelli for his support and comments about
preliminary versions and updates.

The persons mentioned above provided information used in this list. They
did this on personal title, NOT on behalf of their employer, unless
explicitly stated otherwise.
I assume information you mail to me about Gestalt selectors may be used in
this list. Information made available to the general public (e.g. a posting
to a USENET newsgroup) is also included and the persons name added to this
section.
I will mail you back to thank you and include the parts from the list which
were changed, according to the information you provided, to let you check
it.

Legal Stuff
-----------
(C) 1992-1995, Rene G.A. Ros

**NOTICE OF LIABILITY**
The information in this list is distributed on an "AS IS" basis, without
warranty. While every precaution has been taken in the preparation of this
list, neither the editor nor any contributor nor any publisher, providing
this list on any type of media, shall have any liability to any person or
entity with respect to any liability, loss, or damage caused or alleged to
be caused directly or indirectly by the information contained in this list
or by the computer software and hardware products described herein.
In addition it should be noted explicitly this list is NOT a product of
Apple Computer Inc., like any other publisher, NOR are they responsible for
any problems you may encounter in its use.

**TRADEMARKS**
Throughout this list trademarked names are used. Rather than put a
trademark symbol in every occurrence of a trademarked name, I state I am
using the names only in an editorial fashion and to the benefit of the
trademark owner with no intention of infringement of the trademark.

**USE AND DISTRIBUTION**
The information in this list may be used freely, but the list is NOT
public domain.
When you use the information in this list for COMMERCIAL purposes, you may
consider sending the editor a donation to help pay in the costs.

It is not allowed to use excerpts of this list with your documentation, or
in any other way, without giving proper credit by using this line:
"This documentation lists information provided by the Gestalt Selectors
List, edited and maintained by Rene G.A. Ros (Internet: [e-mail])"
If you use excerpts you are advised to subscribe to the mailing list to be
notified about errors and the latest news.
Or, when your software makes extensive use of the information provided by
this list, please use this line in your documentation:
"This software uses information provided by the Gestalt Selectors List,
edited and maintained by Rene G.A. Ros (Internet: [e-mail])"
Please also mention this list in the About window of your software, if
possible.

The GSL may not be distributed outside any computer network on media of
which the capacity exceeds 2 Megabytes or in print unless you have
contacted the editor, prior to publication, and received permission to do
so. This is mainly to ensure you have the latest version. The updates may
not be distributed, these are ONLY for the persons on the mailing list.

Permission for distribution of the full list is granted to:
Aladdin Systems                      (InstallerMaker software)
Apple Computer, Inc.                 (Developer CD Series, Bookmark CD)
Arizona Macintosh Users Group        (BBS in a BOX CD-ROM)
Celestin Company                     (Apprentice CD-ROM, CD-ROM companion
                                      to TRICKS OF THE MAC GAME PROGRAMMING
                                      GURUS book)
Club Macintosh de Quebec
CP Shareware
Pacific HiTech, Inc.                 (Info-Mac CD-ROM, Umich CD-ROM)
Quantum Leap Technologies, Inc.      (The Right Stuffed CD-ROM)

Distribution of modified versions of this list, including, but not limited
to, deleting, adding or moving text or adding non-text parts, is not
allowed. Distribution in any electronical format except a normal (or
compressed) text file is not allowed without permission.
You are not allowed to redistribute the GSL with any other name than
'gestalt-selectors-XX.YYY'  or 'Gestalt Selectors List X.X' for a plain
text file format (where XX and X.X is the version number and YYY the suffix
to indicate compression etc.), unless because of technical reasons. In such
case a name should be chosen which resambles it as closely as possible to
avoid possible confusion.

Editor's Address
----------------
Rene G.A. Ros
developer at Mac Support Automation B.V., Uitgeest, The Netherlands
consultant to the Computer Department,
    Biology Faculty, Vrije Universiteit Amsterdam, The Netherlands
contract programmer Pascal and C, also 4th Dimension and other data-bases

D.C. van Krimpenstraat 3
1067 SG  Amsterdam-Geuzenveld
The Netherlands, Europe

Email: [e-mail] (preferred)
       [e-mail]
       [e-mail]