Int 15/AH=0Bh

VMiX - sys_sysreq - SYSTEM CONFIGURATION MANAGER

AH = 0Bh.
STACK:
WORD    caller's UID
DWORD   pointer to ASCIZ name of requested method
"abort" abort current send/receive on comm port
"block" start/end critical section
"close" terminate interrupt-drive comm I/O
"open" prepare comm port for interrupt-driven I/O
"delay" set delay timer and wait
"hibernate" put process to sleep
"ints" enable/disable interrupt-driven INT 14h
"length" get current send/receive buffer offsets
"kswitch" switch stacks
"numproc" get number of active processes
"protocol" set protocol function for comm interrupts
"relocate" set/reset VMiX flag for relocating to himem
"status" get current open comm port status
"wake" awaken a process
"xport" get comm port polled for logins
---if "abort"---
no additional arguments
---if "block"---
WORD   0000h end, 0001h start
---if "close"---
no additional arguments
---if "open"---
WORD   comm port (00h-03h)
WORD   BIOS parameter byte (see #00300 at INT 14/AH=00h),
except bits 7-5:
000 = 19200, 001 = 38400, 011 = 115200
---if "delay"---
WORD   time in seconds
---if "hibernate"---
WORD   process ID
---if "ints"---
WORD   0000h if no, 0001h if yes
---if "length","numproc","relocate","status","xport"---
no additional arguments
---if "kswitch"---
DWORD  pointer to new stack
---if "protocol"---
DWORD  pointer to function (must be in low "assign"ed memory
when in 386 mode)
---if "wake"---
WORD   process ID

Return:
DX:AX -> result or 0000h:0000h
---if "length"---
BYTE   receive offset
BYTE   send offset
---if "kswitch"---
DWORD  old stack pointer
---if "numproc"---
WORD   number of active processes
---if "status"---
current open comm port status
---if "xport"---
current comm port being polled for logins

Note: The "delay" command reportedly disables the keyboard until the delay completes

See Also: AH=05h"VMiX" - AH=0Eh"VMiX"

Category: Other Operating Systems - Int 15h - V

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