Int 7F Fn 0104  - Hllapi (ibm 3270 High-level LANguage API)/llapi (rabbit  [I]

   AX = 0104h (HLLAPI gate ID)
   BX = 0000h
   DS:SI -> parameter control block (see below)

Return: parameter control block updated

See Also: AX=0105h,AX=ABCDh

Format of parameter control block:
Offset Size    Description
 00h  3 BYTEs  signature = 'PCB'
 03h   BYTE    function number (see below)
 04h   WORD    segment of control string
 06h   WORD    offset of control string
 08h   WORD    length of control string, unless explicit end-of-str char set
 0Ah   BYTE    unused (IBM)
       ControlString[0] (Rabbit)
 0Bh   WORD    return code (see below)
 0Dh   WORD    maximum length of control string (IBM)
       unused (Rabbit)

Values for HLLAPI function number:
 00h   OEM function (Query system for Attachmate implementation)
 01h   Connect presentation space
 02h   Disconnect presentation space
 03h   Send string of keystrokes as if typed from keyboard
 04h   Wait ~60s, returns status of presentation space
 05h   Copy current presentation space into a user-defined buffer
 06h   Search presentation space for first occurrence of a specified string
 07h   Query cursor location in current presentation space
 08h   Copy part or all of current presentation space into user buffer
 09h   Set session parameters; parameters vary by vendor
 0Ah   Get info on sessions currently connected
 0Bh   Lock current presentation space
 0Ch   Unlock previously locked presentation space
 0Dh   Return copy of operator info area (OIA) of current presentation space
 0Eh   get attribute byte for given position in the current presentation space
 0Fh   copy string of characters to the current presentation space
 10h   workstation control functions
 11h   storage manager functions, intended primarily for BASIC applications
   (not implemented by Rabbit)
 12h   set delay period in half-second intervals
 14h   get info on level of workstation support used
 15h   reset session parameters to default values
 16h   get detailed info on the current session
 17h   start host notification to application on presentation sp or OIA update
 18h   check host update when host notification enabled
 19h   stop host notification
 1Eh   search field within current presentation space for string
 1Fh   get first positionof a selected field in the current presentation space
 20h   get length of specified field
 21h   copy string into a specified field
 22h   copy specified field into a user-defined buffer
 23h   create alternate presentation space (IBM only), don't use with BASIC
 24h   switch to alternate presentation space (IBM only), not with BASIC
 25h   display cursor in specified area (IBM only), don't use with BASIC
 26h   display alternate presentation space (IBM only), don't use with BASIC
 27h   delete alternate presentation space (IBM only), don't use with BASIC
 28h   set cursor
 29h   start Close Intercept
 2Ah   query Close Intercept
 2Bh   stop Close Intercept
 32h   start intercepting keystrokes to allow filtering
 33h   get keystrokes after turning on interception
 34h   notify operator when keystroke rejected by filter subroutine
 35h   stop intercepting keystrokes
 5Ah   send file
 5Bh   receive file
 5Ch   run a program (not implemented by Rabbit)
 5Dh   execute DOS command (not implemented by Rabbit)
 63h   change presentation space position to PC display row/col or vice versa
 65h   connect to Window Services
 66h   disconnect from Window Services
 67h   set/query window coordinates
 68h   set/query window status
 69h   change presentation space name
 78h   connect Structured Fields
 79h   disconnect Structured Fields
 7Ah   query size of communications buffer
 7Bh   allocate communications buffer
 7Ch   free communications buffer
 7Dh   get request completion state
 7Eh   read Structured Fields
 7Fh   write Structured Fields
 FFh   Get info on DCA implementation

Values for LLAPI function number:
 80h   initialize LLAPI (internal call)
 83h   set Session ID (one-character ID)
 84h   read Session ID (one-character ID)
 85h   lock 327x keyboard
 86h   unlock 327x keyboard
 87h   wait for Clear to Send
 88h   type ASCII character
 89h   type 327x key
 8Ah   read keyboard lock state
 8Fh   force screen update
 90h   view session
 91h   relinquish (suspend foreground until background becomes idle)
 92h   poke screen character
 93h   poke translated character
 94h   peek screen character
 95h   peek translated character
 96h   set cursor position
 97h   send scan code (Rabbit only)
 98h   synchronize (returns after keystroke queue empty)
 99h   type PC key (Rabbit only)

Session Parameters for function 09h:
 ASCII     ??? (Rabbit only)
 ATTRIB        return attributes in hex
 NOATTRIB  return attributes as blanks
 CONPHYS   make physical connection
 CONLOG        only make logical connection
 EAB       copy extended attribute bytes along with data
 NOEAB     copy data only
 ESC=n     set escape character to "n" (default '@')
 EOT=n     set end of string character (default 00h)
 FPAUSE        full-duration pause
 FTNOWAIT  return immediately from functions 5Ah and 5Bh (Rabbit only)
 FTWAIT        wait for file transfer to complete (Rabbit only)
 IPAUSE        interruptable pause
 RABESC        ??? (Rabbit only)
 NORABESC  ??? (Rabbit only)
 SCANCODE  ??? (Rabbit only)
 STRLEN        use explicit string lengths
 STREOT        use terminated strings
 SRCHALL   search entire presentation space
 SRCHFROM  search from specified offset
 SRCHFRWD  search forward from position 1
 SRCHBKWD  search backward from last position in presentation space
 TIMEOUT=n ??? (Rabbit only)
 TWAIT     wait specified time for keyboard ready
 LWAIT     wait until keyboard ready
 NWAIT     no wait
 TRON      enable tracing
 TROFF     disable tracing
 AUTORESET send reset before sending keys with function 03h
 NORESET   don't send reset
 QUIET     don't display messages sent with INT 21/AH=09h
 NOQUIET   allow messages to be displayed
 TIMEOUT=n set timeout in 30-second intervals, 0 = wait until reak
 XLATE     translate extended attribute bytes
 NOXLATE   don't translate
 NEWRET        use HLLAPI v3.0 return code conventions
 OLDRET        use HLLAPI v2.0 return code conventions

Values for Windows HLLAPI return code:
 00h   successful
 01h   Presentation Space not connected/requested size unavailable
 02h   invalid function or parameter error/invalid block ID
 03h   file transfer complete
 04h   file transfer complete (segmented)/Presentation Space busy
 05h   inhibited or keyboard locked
 06h   data truncated
 07h   invalid Presentation Space position
 08h   operation not available
 09h   system error
 0Ah   blocking error
 0Bh   resource not available
 0Ch   session stopped
 14h   undefined key combination
 15h   OIA updated
 16h   Presentation Space updated
 17h   both Presentation Space and OIA updated
 18h   no such field
 19h   no keystrokes available
 1Ah   Presentation Space or Operator Information Area changed
 1Bh   file transfer aborted
 1Ch   zero-length field
 1Eh   cursor type invalid
 1Fh   keystroke overflow
 20h   another application is already connected
 22h   message sent to host cancelled
 23h   transmission from host cancelled
 24h   lost contact with host
 25h   function successful
 26h   function incomplete
 27h   a DDM session is already connected
 28h   disconnected, but asynchronous requests still pending
 29h   buffer already in use
 2Ah   no matching request found
12Dh   invalid function number
12Eh   file not found
131h   access denied
134h   out of memory
136h   environment invalid
137h   format invalid
270Eh (9998) invalid Presentation Space ID
270Fh (9999) invalid row or column code
---Windows HLLAPI extensions---
F000h  asynchronous call already in progress
F001h  invalid asynchronous task ID
F002h  blocking call cancelled
F003h  underlying subsystem not started
F004h  unsupported application version