www.delorie.com/djgpp/doc/rbinter/4.html   search  
Table 456

Format of MultiDOS Plus v4.0 task control block:
Offset	Size	Description	)
 00h	DWORD	pointer to next TCB
 04h  8 BYTEs	ASCIZ task name
 0Ch  2 BYTEs	???
 0Eh	WORD	task PSP segment
 10h	WORD	abort/suspend flags
 12h	WORD	current screen segment (see AH=0Bh,AH=0Ch)
 14h	WORD	priority level (0000h-FFFEh)
 16h	WORD	time slice counter
 18h  2 BYTEs	???
 1Ah	WORD	suspend timer value
 1Ch	WORD	stack segment
 1Eh	WORD	stack pointer
 20h	WORD	display type
 22h	WORD	display memory
 24h  2 BYTEs	???
 26h	WORD	termination count
 28h	WORD	equipment flag for BIO10 driver
 2Ah	BYTE	background CRT mode
 2Bh	WORD	screen width in columns
 2Dh	WORD	screen size in bytes
 2Fh	WORD	segment of physical screen memory
 31h 16 BYTEs	eight cursor positions
 41h	WORD	current cursor shape
 43h	BYTE	active display page
 44h	WORD	CRT controller I/O port base
 46h  2 BYTEs	???
 48h	WORD	foreground task flag
 4Ah  6 BYTEs	???
 50h	WORD	saved video segment (see AH=0Bh,AH=0Ch)
 52h	DWORD	old INT 22
 56h	DWORD	old INT 23
 5Ah	DWORD	old INT 24
 5Eh	WORD	top of memory for task
 60h  4 BYTEs	???
 64h	WORD	DTA segment (see INT 21/AH=1Ah)
 66h	WORD	DTA offset
 68h  4 BYTEs	???
 6Ch	BYTE	current ANSI.SYS attribute
 6Dh	BYTE	current ANSI.SYS column
 6Eh	BYTE	current ANSI.SYS row
 6Fh	BYTE	current ANSI.SYS display state
 70h	BYTE	maximum ANSI.SYS columns
 71h	BYTE	current ANSI.SYS page
 72h	WORD	saved ANSI.SYS cursor position
 74h	BYTE	ANSI.SYS parameter buffer index
 75h	BYTE	current ANSI.SYS screen mode
 76h	BYTE	ANSI.SYS wrap flag
 77h  6 BYTEs	ANSI.SYS parameter buffer
 7Dh	BYTE	ANSI.SYS keyboard DSR state
 7Eh  7 BYTEs	ANSI.SYS keyboard DSR buffer
 85h  3 BYTEs	???
 88h 16 BYTEs	request header for DOS driver calls
 98h 14 BYTEs	???
 A6h	WORD	segment of EMS map if EMS task
 A8h	WORD	flag: task makes EMS calls
 AAh	WORD	EMS handle for task
 ACh	WORD	keyboard shift state
 AEh 12 BYTEs	???
 BAh	WORD	TCB of parent if child task
 BCh	WORD	termination code
 BEh	WORD	COM port number
 C0h  4 BYTEs	???
 C4h	WORD	current IRQ number
 C6h  2 BYTEs	???
 C8h	WORD	miscellaneous flag word
 CAh  2 BYTEs	???
 CCh	DWORD	old INT 10
 D0h	WORD	EMS alternate map set number
 D2h 414 BYTEs	DOS current disk and directory context (optional)

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2000   by Ralf Brown     Updated Jul 2000