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System 7.5 Update 1.0 provides the user with bug fixes and enhancements that
have become available since the shipment of System 7.5. This technical note
describes the bug fixes and enhancements in some detail.
Feb 01 1995
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Introduction
Topics
- New Features of System 7.5 Update 1.0
- System 7.5 Apple Menu Items revisions
- System 7.5 Control Panels items revisions
- System 7.5 Extensions items revisions
- Other System 7.5 components revisions
- New Printer Drivers
- PowerTalk Changes
- Bug Fixes
- Other information
Macintosh System 7.5 Update 1.0 provides the user with bug fixes and
enhancements that have become available since the shipment of System 7.5. This
technical note describes the bug fixes and enhancements in some detail.
New Features of Macintosh System 7.5 Update 1.0
File Sharing Extension 7.6.1
Older versions of the File Sharing extension were built from an early version
of the AppleShare 3.0 source base. AppleShare has been revised since then,
adding many new features and bug fixes. File Sharing 7.6.1 is Personal File
Sharing built from the AppleShare 4.0.2 source base. It incorporates all the
of the bug fixes and enhancements since AppleShare 2.0 that are present in
AppleShare 4.0.2. It consists of a single extension which will replace the
customer's older version. Among the enhancements in File Sharing Extension
7.6.1 is the ability to eject removable media such as CD-ROM discs without
turning off file sharing.
Since File Sharing 7.6.1 is built from the same source as AppleShare 4.0.2,
they share the same feature set. This adds support for ejectable media and
additional server control calls to File Sharing. For details, see tech note NW
29 - File Sharing Extension 7.6.1.
Power Off Key
The Quadra 840AV introduced the ability to shut down the computer by pressing
the Power On key and responding appropriately to the confirmation dialog.
Macintosh System 7.5 Update 1.0 provides this functionality for all ADB-based
Macintosh computers. This excludes the Macintosh Plus (which does not use
ADB) and the built-in keyboards of PowerBook 1x0 models. (These keyboards do
not have a Power On key. If you attach an external keyboard to a PowerBook,
the Power On key on the external keyboard behaves as described.)
"Welcome To Macintosh" greeting update
Customers were calling asking why their desktop files are being rebuilt on
every start up. The customers were confusing the progress bar in the Welcome
To Macintosh greeting with the Rebuilding Desktop dialog. At the time the
progress bar appears, we now display the new MacOS(TM) start up screen with a
"Starting Up..." string to clarify the meaning of the progress bar.
Keyboard Control Panel 7.5.1
System 7.5 shipped with all of international keyboard layouts in the System
file by default. Some popular applications use the Command-Option-Space key
sequence which also causes the selected keyboard layout to change. Keyboard
7.5.1 has a check box which enables and disables the keyboard layout switching
via Command-Option-Space. The default is switching off. There was also a
problem with the use of a wrong register in a loop which was fixed.
System 7.5 Apple Menu Items revisions
Find File 1.1.1
Find File now offers improved two-byte language support. Fixed bug which did
not handle server volumes with restricted access properly. Find File now works
correctly on volumes which do not support file ID references. Previously, Find
File would find matches but would report, "The item ITEMNAME is missing and was
probably deleted. Other items may be affected; checking them now." Examples
of volumes which do not support file ID references are AFP 2.0 compliant
network servers and ISO 9660 formatted CD-ROMs.
Jigsaw 1.0.1 Update
Jigsaw now calls HNoPurge on the sounds after loading them to make sure they
are not purgeable.
Shutdown DA 1.0.1
The previous Shutdown desk accessory (1.0P) does not walk the Shutdown Items
folder. We added code to properly walk the Shutdown Items folder.
Stickies 1.0.1
There was a bug in Stickies 1.0 which caused intermittent crashes when
launching Stickies if one of the notes was collapsed via WindowShade.
System 7.5 Control Panel items revisions
Apple Menu Options 1.0.1
Apple Menu Options reduced the number of places where it calls FSMakeFSSpec.
This call was causing considerable slowdown on servers. Apple Menu Options
also had a patch on Open which was not restoring A5 correctly. Finally, Apple
Menu Options now correctly handles non-AppleShare servers.
The Recent Servers folder is implemented by checking each successfully mounted
volume to see if it is a server volume. Under System 7.5, only AppleShare
volumes were tracked. This behavior is changed with Macintosh System 7.5 Update
1.0 to include any volume that returns a non-zero value in vMServerAdr in
response to PBHGetVolParms.
General Controls 7.5.3
Application Folder locking was fixed plus new error codes for System and
Application folder locking were added. Coupled with the Finder Update, the
dialogs put up by System and Application folder locking are much less cryptic.
The General Controls control panel can now be opened even if the machine was
booted with Extensions disabled.
Launcher 2.7
This is a follow on to the Launcher shipped with the most recent Performas.
Version 2.5 brought Drag and Drop to the Launcher. It now refers to SimpleText
(instead of TeachText) in its Balloon Help.
MacTCP 2.0.6
MacTCP version 2.0.6 contains improvements over MacTCP 2.0.4 and earlier
versions, and is recommended for all MacTCP users. The Domain Name Resolver has
been changed to avoid out-of-memory errors previously seen with BIND 4.9.2/3
ADDAUTH PTR replies. The DNR is also now fully up-to-date in terms of permitted
and forbidden syntax for domain names. MacTCP 2.0.6 offers better performance
through changes to its retransmission timers. Also, MacTCP now supports BootP
Relay Agents, and now remembers the first to respond ('best') BootP server.
Monitors 7.5.1
Monitors 7.5 did not work with multiple monitors on a single NuBus card.
PC Setup 1.0.2
PC Setup 1.0.2 is the latest version of the control panel used in
conjunction with the Centris/Quadra 610 PC Card. The control panel was shipped
with System Update 3.0 for System 7.1.x. This update will bring the control
panel to 7.5 users.
Speech Manager 1.3
Speech Manager 1.3 is provided as a convenience for customers. System 7.5 did
not ship with a current version of the Speech Manager. This is corrected in
Macintosh System 7.5 Update 1.0.
WindowShade 1.3.1
WindowShade called into unlocked WDEF code - which can be moved while it is
executing. This leads to random code/data being executed. WindowShade now
locks the WDEF before calling it.
System 7.5 Extensions items revisions
Apple Guide 1.2.5
Macintosh System 7.5 Update 1.0 introduces a fat version of Apple Guide which
also includes some compatibility fixes for At Ease.
Macintosh Easy Open 1.1.1
Macintosh Easy Open 1.1.1 fixes problems with Cut and Paste between DOS and
Macintosh applications running on a Macintosh with a DOS card installed. It
also fixes a problem with Drag and Drop functionality of document converters
intermittently failing.
MathLib 2.0.1
MathLib 2.0.1 is a performance enhanced version of the MathLib found in the ROM
of the Power Macintosh 6100/7100/8100 series. This new MathLib offers
substantial performance increases for Power Macintosh computers, especially
concerning hyperbolic, trigonometric, power, exponential, and logarithmic
functions. Support for long double (double-double) precision transcendental
functions has also been added. MathLib 2.0.1 is IEEE 754 compliant.
Native QuickDraw Update
The Power Macintosh version of QuickDraw has been revised since the version
that shipped with System 7.5. This updated version includes various bug fixes.
Macintosh System 7.5 Update 1.0 brings the latest version of native QuickDraw
to existing Power Macintosh computers. The Gestalt selector 'qd ' now returns
a version of 2.3.9. Pattern fills have been optimized to use a run-length
mask, not a straight bitmap mask. A bug was fixed which avoids an overflow
error when creating packed bitmaps/pixmaps.
SCSI Manager 4.3.1
If a device goes bus free after the command phase the SCSI Manager would
crash. Now, the SCSI Manager will not dispatch the next command if the
bus is free after waiting for the earlier command. The SCSI Manager
mistakenly tried to optimize TIBs on machines which do not have DMA - this
could potentially cause data loss. TIB optimization is now turned off for
pseudo-DMA machines.
Selected CPU Enhancements
Macintosh System 7.5 Update 1.0 will roll in the functionality and remove the
following CPU Specific System extensions: Color Classic Update, 040
VM Update, 630 SCSI Update, EM Sound Update, PowerBook 150
Update and Mount IDE Drive. (The 630 SCSI Update is superseded
by SCSI Manager 4.3.1.)
Other System 7.5 components revisions
SimpleText 1.2
Various minor problems with SimpleText 1.1.1 were fixed.
Synchronize Folder AppleScript Update
The Synchronize Folder AppleScript shipped with System 7.5 does not handle
nested folders properly. It replaces one folder with another depending on the
last modification date instead of recursively traversing the sub folders. We
replace this incorrect script with a new version of the AppleScript which
recursively traverses sub folders.
Share a Folder (No Guest) AppleScript
This is a new AppleScript, based on the "Share a Folder" automated task.
It shares a folder with Guest access disabled.
Share a Folder AppleScript update
While implementing the Share a Folder (No Guest) we noticed that the Share a
Folder script used 'ok' instead of 'OK'. We changed the script to use 'OK' and
called it version 7.5.1.
New Printer Drivers
Color StyleWriter Pro driver Update
Version 1.5.1 of the Color StyleWriter Pro driver fixes a timeout loop which
never timed out when printing the calibration page for the first time.
LaserWriter 8 (v8.2)
The latest version of the LaserWriter 8 driver is provided as part of Macintosh
System 7.5 Update 1.0. A PICT file with rotation PicComments did not print
properly. This bug has been fixed. Automatic setup for printers has been
improved so that it will automatically query the printer for setup information.
The user does not have to manually select this information. Several minor bug
fixes and enhancements were also added.
PowerTalk changes
AppleMail 1.1.2
AppleMail 1.1.1 had a performance problem when there are a large number of
fonts installed in the current System. The problem stems from a bug in the
version of MacApp used to build AppleMail, which resulted in a section of code
being called once for every font installed at application startup and whenever
a menu is pulled down. The code was changed to make the call only once instead
of once per installed font.
DigiSign Utility 1.1.1
A problem was reported against the System 7.5 DigiSign utility that it could
not print a DigiSign request on an HP DeskWriter C. The root of the
problem was that the default print record was marked as purgeable. In DigiSign
Utility 1.1.1 the default print record is not marked as purgeable. The
application can print to an HP DeskWriter C without a problem.
Direct Dialup 1.1.1
There are several Direct Dialup problems addressed in Macintosh System 7.5
Update 1.0. The first is that the previous version of Direct Dialup would
timeout in the middle of a long file transfer if the transfer required more
than 3 minutes. The system did not detect any activity during the file
transfer and would close the connection since it thought it had been dropped.
The second problem is a crash when dragging a Direct Dialup address from the
Mailer to the desktop and then using that address to send Direct Dialup mail.
The third problem occurs when a user selects "Off line" from the "I'm at..."
menu and then sent a Dialup letter. The letter would appear as "waiting" in
the Out Tray. If the user selects the letter and chooses "Send now" an error
of type -9014 would be displayed to the user. We added code to ping the system
during file transfers so the connection does not time out. We fixed the code
to recognize the address dragged out of the mailer as a valid address.
Catalogs Extension 1.1.1
The System 7.5 Catalogs Extension would sometime display an Out of Memory
message even though plenty of memory is available. The root of the problem is
that the Catalogs Extension was making calls on files that were already closed.
The problem generally manifested itself after several applications had been
launched and quit and then the Catalogs icon was opened. This was fixed.
Mailbox Extension 1.1.1
The System 7.5 Mailbox Extension had a problem with switching between Finder
and At Ease. When the user switches to the Finder and then back to At Ease,
the mail notify buffer was being disposed before the Mailbox Extension was
closed. The process of closing the Mailbox Extension accessed the mail notify
buffer - which is no more! This was fixed.
Bug fixes
ADB Patch for Quadra 700
European Quadra 700s were generating spurious ADB Resets. The root of the
problem was an IRQ issued during an ADBOp call. This was fixed by replacing
the VIA StartReqProc which avoids the collision between an ADBOp and autopoll
data from the transceiver.
Standard File Update
Some problems have been discovered in the System 7.5 version of the Standard
File Package. They include a crash if the item list is displayed off screen,
incorrectly setting some list manager private variables when manipulating items
in its list display, ignoring an application's dctb when a custom color dialog
is used and returning an invalid vRefNum/dirID for an alias on the desktop.
These are all fixed.
PowerMac Serial Driver Hang
Under certain well defined conditions (such as printing to a Personal
LaserWriter which is not on) the serial driver on a PowerMac would hang in a
loop waiting for a timeout to occur. This is fixed.
ResolveIDConflicts fix
It was possible for ResolveIDConflicts to not correctly resolve id
conflicts. For all 68k machines, if a FONT and NFNT have the
same id, ResolveIDConflicts would do nothing to resolve the conflict
and the wrong font would appear. For all machines, if a conflict is detected
ResolveIDConflicts would possibly assign to a FONT or
NFNT a "unique" id which was actually already assigned to an
NFNT or FONT. A new ResolveIDConflicts routine has
been created which checks for FONT and NFNT conflicts both
initially and when generating a new id when a conflict is found.
Generic Creator Desktop Icon Patch
Long ago there was an application released with a creator of '????'
and a valid bundle for that creator. This "visual virus" has been widely
spread to desktops all around the world. Now on many systems a generic
application will have this icon. We patch DTGetIcon and DTGetIconInfo
to return afpItemNotFound for any request with a '????' creator. We also patch
DTAddIcon to return ioErr if an attempt is made to add icon information for a
'????' creator.
Gestalt Update
NewGestalt was calling StripAddress on an address passed to it rather than a
local copy. This caused some third party processor boards to fail. The 'sysv'
Gestalt selector returns 0x0751 when Macintosh System 7.5 Update 1.0 is installed.
Finder Update
Several Finder bugs were fixed, and two new strings were added for the use of
personal File Sharing. The bugs fixed include a Finder Preferences corruption
due to dereferencing a dangling pointer and an infinite loop due to a circular
open window list (alternating arrow/watch cursor hang).
Threads 2.1.1 update
Preemptive threads did not preempt after the first threaded application
launched in Threads 2.0.1. This was fixed. You couldn't get information on a
68k thread from a PPC thread & vice versa. Now it's possible for a
68k thread to get information on a PPC thread & vice versa. The Threadslib
shared library added native debugger nub support, and fixed a minor bug in
context switching.
Virtual Memory update
Added support for HFS volumes larger than 4 GB. If a filemapped code fragment
was too big, the resource fork of the fragment's file could be closed rather
than the data fork
Video Driver Patches
The Quadra 630 (and its LC/Performa relatives) running System 7.5 did not
properly support the use of Apple multisync monitors and the Apple 12" RGB
monitor. One of the video drivers in System 7.5 did not include proper TV mode
support for the Mac TV or IIe Hi Res mode support for the Color Classic
with IIe card. Both of these problems are fixed.
Display Manager update
Quadra 840AV computers did not remember the resolution a multisync monitor was
set to between restarts. The monitor would resync as at 640x480 regardless of
the value set by the user.
PBSetVInfo and Rename patches restored
SetVolInfo (that's PBSetVInfo) and Rename were patched by System 7 so that if
you changed the name of the volume or of the root directory, both names were
changed (having two different names for the volume and root directory is a bad
thing because it breaks things like full pathnames). Somehow, the patch on
SetVolInfo was lost when they built the ROM used on 660AV, 840AV, and Power
Macintosh machines. That meant that the two names could get out of sync if the
volume name was changed with PBSetVInfo. With 7.5 Update, the patch is back.
Video Fixes for machines with ROM version $77D
Under certain conditions users of some 660AV, 840AV, and Power Macintosh
machines would experience scrambled video on startup.
Older Memory Manager fix
The 68k Memory Manager routine MoveHLow incorrectly tests the error code
returned from RecoverHandle and may crash. MoveHLow assumes that a
RecoverHandle succeed when it actually failed.
Drag Manager Update
Bug fixes and improvements which were introduced for System 7.5 in Japan are
now applied for all System 7.5 systems.
Process Manager Update
During scrap coercion the Process Manager called PtrToXHand passing in
an unlocked dereferenced handle as a pointer. It then did a BlockMove
using the same pointer. The block in question may have moved as a result of
the PtrToXHand, leaving the Process Manager with a dangling pointer,
which will most likely point into the system heap. The BlockMove then
clobbered the memory pointed to by the dangling pointer. The MoveScrap
routine in the Process Manager has been changed to SetHandleSize the
scraphandle before calling BlockMove and not dereference the handle
until the BlockMove call is made.
After EPPC started a PPC session with StartSecureSession, it
deleted the user reference number returned in the PPCStartPBRec, which
is the correct behavior unless the reference number is the default user's
reference number. Now a call is made to determine if the reference number
returned in the PPCStartPBRec is the default user reference number and
if so it is not deleted.
Under System 7.5, a background process that has the "high level event aware"
bit set in the SIZE resource has priority in event handling. If a high level
event aware process has an event pending, and fails to process that event, the
event stays in the event queue, and any background processes which do not have
the "high level event aware" bit set in the SIZE resource will never get CPU
time. This behavior was changed in Macintosh System 7.5 Update 1.0. Background
processes without the high level event aware bit set will now get CPU time,
even if a high level event aware process has pending events.
Sound In Driver Update
Under certain conditions DRVR -16499 (.AppleSoundIn) will not be installed
where it needs to be by the 7.5 installer. Macintosh System 7.5 Update 1.0
will include the latest version of the DRVR to remedy this problem.
Touch Pad accl update
A new accl resource for the PB 520/540 touch pad is installed. The
new accl curve gives the pad a better feel and response to the user's touch.
Boot Process Changes
The System 7.5 Update enabler now supports booting all Macintosh computers
introduced up to January 95. This includes the Power Macintosh 8100/110,
8100/100, 7100/80, and 6100/66. The System 7.5 Update enabler also supports
Power Macintosh 6100 models equipped with the PowerPC upgrade card.
Apple Workgroup Server 9150 Support
The Apple Workgroup Server 9150 needs an enabler to run under System 7.5.
Current Apple Workgroup Server 9150 CPUs cannot boot System 7.5. This is fixed
in Macintosh System 7.5 Update 1.0.
FMSwapFont update
The native version of FMSwapFont that shipped in 7.5 had some problems dealing
with multibit source fonts, a problem properly handling the Palatino font, and
a bug involving a handle which it created in the current zone instead of the
system zone. These problems are all fixed.
FSM (File System Manager) Update
Fixed memory trashing problem in FSM's dynamic load mechanism.
Quadra 630/System 7.5-J Shutdown crash
It was discovered during the System 7.5 Japanese effort that a Quadra 630
running 7.5J would crash on shutdown. The old shutdown code called Eject and
then UnmountVol. The fix for this problem was to call UnmountVol and then Eject.
StdText Update
Under System 7.1.2 and System 7.5 the DrawText() routine had a bug which could leave a locked 'sfnt' or 'NFNT' handle
in the system heap. This has been corrected. Anti-aliased text was not properly displayed in System 7.5; this was fixed.
Other Information
System 7.5 Update Enabler File
The majority of the system level bug fixes and low level system enhancements
exist in the System 7.5 Update enabler file. This file is a System Enabler
('MACS', 'gbly'). The enabler was used instead of modifying the user's system
file for two reasons. The first is that all of the changes are encapsulated
and easy to remove. The second is so the user can still run the System 7.5
installer on the System after having installed the update.
Shared Library Icons
This is a known problem with System 7.5 and Macintosh System 7.5 Update 1.0.
Shared libraries have icons which were displayed correctly by default under
System 7.1.2. These shared libraries will appear with generic icons under
System 7.5 and Macintosh System 7.5 Update 1.0.
Conclusion
Macintosh System 7.5 Update 1.0 provides a significant set of enhancements and
bug fixes for customers and developers. We recommend you install it.
References
Inside Macintosh, all 27 volumes.
Most tech notes ever written, but especially Technical note OV 21 - System 7.5
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