--------O-2FAF01-----------------------------
INT 2F - WinDOS v2.11 - TURN ON ONLINE MODE
	AX = AF01h
Return: nothing
Desc:	indicate that the user will not exchange floppy disks, allowing WinDOS
	  to cache disk sectors in memory and avoid writing modified sectors
	  back out to the floppy disk
SeeAlso: AX=AF00h"WinDOS",AX=AF02h"WinDOS"
--------O-2FAF02-----------------------------
INT 2F - WinDOS v2.11 - TURN OFF ONLINE MODE
	AX = AF02h
Return: nothing
Desc:	indicate that the floppy disk may be removed, and that WinDOS should
	  write all buffered sectors out to the floppy disk
SeeAlso: AX=AF00h"WinDOS",AX=AF01h"WinDOS"
----------2FAF02-----------------------------
INT 2F U - ???
	AX = AF02h
	???
Return: ES = ???
SeeAlso: AX=AF00h
--------O-2FAF03-----------------------------
INT 2F - WinDOS v2.11 - TURN VIDMEM ON
	AX = AF03h
Return: AX = status
	    0000h successful
	    0001h CPU not in mode set by DOS386=On
	    0002h video adapter in graphics mode
	    0003h memory chain corrupted
SeeAlso: AX=AF00h"WinDOS",AX=AF04h"WinDOS",AX=AF05h"WinDOS"
----------2FAF03-----------------------------
INT 2F U - ???
	AX = AF03h
	???
Return: DX = ???
SeeAlso: AX=AF00h
--------O-2FAF04-----------------------------
INT 2F - WinDOS v2.11 - TURN VIDMEM OFF
	AX = AF04h
Return: AX = status
	    0000h successful
	    0001h video memory is in use
SeeAlso: AX=AF00h"WinDOS",AX=AF03h"WinDOS",AX=AF05h"WinDOS"
----------2FAF04-----------------------------
INT 2F U - ???
	AX = AF04h
	???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF05-----------------------------
INT 2F - WinDOS v2.11 - GET VIDMEM STATE
	AX = AF05h
Return: AX = status (0000h off, 0001h on)
SeeAlso: AX=AF00h"WinDOS",AX=AF03h"WinDOS",AX=AF04h"WinDOS"
----------2FAF05-----------------------------
INT 2F U - ???
	AX = AF05h
	???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF06-----------------------------
INT 2F - WinDOS v2.11 - MAKE PROGRAM UNBREAKABLE
	AX = AF06h
	DS:DX -> break handler
	DI:BX = stack to use for break handler
Return: nothing
Desc:	set a handler which should be invoked when Ctrl-C is pressed instead of
	  aborting the program
SeeAlso: AX=AF00h"WinDOS",AX=AF0Ah"WinDOS",AX=AF0Ch"WinDOS"
--------O-2FAF07-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL FATAL OVERLAY FAULT
	AX = AF07h
Return: never -- system reset
Desc:	pop up a window indicating that the system overlay file can not be
	  loaded
SeeAlso: AX=AF00h"WinDOS",AX=AF08h"WinDOS"
--------O-2FAF08-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL RECOVERABLE OVERLAY FAULT
	AX = AF08h
Return: nothing
Desc:	pop up a window requesting that a disk containing SH.OVL be inserted
SeeAlso: AX=AF00h"WinDOS",AX=AF07h"WinDOS",AX=AF0Bh
--------O-2FAF09-----------------------------
INT 2F - WinDOS v2.11 - GET TERMINATED PSP
	AX = AF09h
Return: DS = PSP segment of most recently ended TSR
SeeAlso: AX=AF00h"WinDOS",AX=AF0Ah
--------O-2FAF0A-----------------------------
INT 2F - WinDOS v2.11 - GET MAIN SHELL PSP
	AX = AF0Ah
Return: AX = shell's PSP (same as DS on last call to AX=AF06h)
Desc:	get the PSP address of the last program to call AX=AF06h (normally
	  the main command interpreter)
SeeAlso: AX=AF00h"WinDOS",AX=AF06h"WinDOS",AX=AF09h
--------O-2FAF0B-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL FATAL ERROR
	AX = AF0Bh
Return: never -- system reset
Desc:	pop up a window indicating a terminal system error
SeeAlso: AX=AF00h"WinDOS",AX=AF07h,AX=AF08h,AX=AF15h"WinDOS"
--------O-2FAF0C-----------------------------
INT 2F - WinDOS v2.11 - GET OTHER MAIN SHELL PARAMETERS
	AX = AF0Ch
Return: DI:AX = stack
	SI = offset of break handler
Desc:	retrieve the parameters last set by AX=AF06h (normally by the main
	  command interpreter)
SeeAlso: AX=AF00h"WinDOS",AX=AF06h"WinDOS"
--------O-2FAF0D-----------------------------
INT 2F - WinDOS v2.11 - GET CURRENT PARAMETER
	AX = AF0Dh
	BX = offset of desired parameter in global data area
Return: AX = current value of parameter (AH undefined if byte value)
SeeAlso: AX=AF00h"WinDOS",AX=AF0Eh
--------O-2FAF0E-----------------------------
INT 2F - WinDOS v2.11 - SET CURRENT PARAMETER BYTE VALUE
	AX = AF0Eh
	BX = offset of desired parameter in global data area
	DL = new value of parameter
Return: nothing
SeeAlso: AX=AF00h"WinDOS",AX=AF0Dh
--------O-2FAF0F-----------------------------
INT 2F - WinDOS v2.11 - GET HISTORY SEGMENT
	AX = AF0Fh
Return: AX = segment of buffer for input history, or 0000h if none
SeeAlso: AX=AF00h"WinDOS",AX=AF10h"WinDOS"
--------O-2FAF10-----------------------------
INT 2F - WinDOS v2.11 - SET HISTORY SEGMENT
	AX = AF10h
	BX = segment of new buffer for input history
Return: nothing
Note:	the buffer must have been allocated with INT 21/AH=48h
SeeAlso: AX=AF00h"WinDOS",AX=AF0Fh"WinDOS"
--------O-2FAF11-----------------------------
INT 2F - WinDOS v2.11 - FREE XMS BLOCKS
	AX = AF11h
Return: nothing
Desc:	free all XMS blocks whose XMS identification value (see AX=AF12h)
	  equals the current PSP
SeeAlso: AX=AF00h"WinDOS",AX=AF12h"WinDOS",INT 21/AH=50h
--------O-2FAF12-----------------------------
INT 2F - WinDOS v2.11 - SET XMS IDENTIFICATION VALUE
	AX = AF12h
	DS = new XMS identification value (normally caller's PSP segment)
Return: nothing
SeeAlso: AX=AF00h"WinDOS",AX=AF11h"WinDOS"
----------2FAF12-----------------------------
INT 2F U - ???
	AX = AF12h
	???
Return: ES = ???
SeeAlso: AX=AF00h
--------O-2FAF13-----------------------------
INT 2F - WinDOS v2.11 - SET ASSIGN VALUE
	AX = AF13h
	BL = number of drive to remap (00h = A:)
	DL = number of drive to be accessed via drive number BL
Return: nothing
Desc:	remap a drive letter
Note:	the remapping can be canceled by specifying DL=BL
SeeAlso: AX=AF00h"WinDOS",AX=AF14h"WinDOS",AX=0601h
----------2FAF13-----------------------------
INT 2F U - ???
	AX = AF13h
	???
Return: ???
SeeAlso: AX=AF00h
--------O-2FAF14-----------------------------
INT 2F - WinDOS v2.11 - GET ASSIGN VALUE
	AX = AF14h
	BL = drive number (00h = A:)
Return: DL = drive number which is actually accessed by drive number BL
Desc:	determine the current mapping for a drive
SeeAlso: AX=AF00h"WinDOS",AX=AF13h"WinDOS",AX=0601h
--------O-2FAF15-----------------------------
INT 2F - WinDOS v2.11 - SIGNAL STACK ERROR
	AX = AF15h
Return: never -- system reset
Desc:	pop up a window indicating a stack overflow
SeeAlso: AX=AF00h"WinDOS",AX=AF0Bh"WinDOS"
--------O-2FAF16-----------------------------
INT 2F - WinDOS v2.11 - GET SIMPLE TRUENAME
	AX = AF16h
	DS:SI -> path to be canonicalized
	ES:DI -> buffer for canonicalized filename/pathname
Return: CF clear if successful
	    AX = 0000h
	CF set on error
	    AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Desc:	partially canonicalize a path, omitting SUBST, JOIN, ASSIGN, and
	  network redirections
SeeAlso: AX=AF00h"WinDOS",INT 21/AH=60h
--------O-2FAF17-----------------------------
INT 2F - WinDOS v2.11 - QUERY FOR NEW CURRENT DRIVE
	AX = AF17h
Return: nothing
Desc:	pop up a dialog allowing the user to select a new default drive
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF18-----------------------------
INT 2F - WinDOS v2.11 - SET CTRL-C/CTRL-BREAK DISABLE FLAG
	AX = AF18h
	DL = new break-checking state (00h enabled, 01h disabled)
Return: nothing
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF19-----------------------------
INT 2F - WinDOS v2.11 - SET HEAD SETTLE FLAG
	AX = AF19h
	DL = new state
	    00h diskette head settling time reset to 15ms before each access
	    01h no additional head settling time used between accesses
Return: nothing
SeeAlso: AX=AF00h"WinDOS"
--------O-2FAF1A-----------------------------
INT 2F - WinDOS v2.11 - SEARCH FOR NON-FRAGMENTED DISK AREA
	AX = AF1Ah
	BL = drive (00h = current, 01h = A:, etc.)
	CX = number of clusters desired
Return: CF clear if successful
	    DI = first free cluster on logical drive
	    BP = first cluster of contiguous free area
	    AX destroyed
	CF set on error
	    AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
Desc:	attempt to find an area of the disk containing the specified number
	  of contiguous unallocated clusters
SeeAlso: AX=AF00h"WinDOS"
----------2FAF30-----------------------------
INT 2F U - ???
	AX = AF30h
	???
Return: ???
SeeAlso: AX=AF00h
--------d-2FAFDE-----------------------------
INT 2F - Disk-Emu - INSTALLATION CHECK / GET VERSION
	AX = AFDEh
	ES:DI -> 14-byte buffer for data (see #02979)
Return: AX = CFDEh (Carlos Fernandez Disk-Emu) if installed
	    BX = version (BH = major, BL = minor)

Format of Disk-Emu information data:
Offset	Size	Description	(Table 02979)
 00h	BYTE	number of tracks
 01h	BYTE	sectors per track
 02h	WORD	bytes per sector
 04h	BYTE	number of heads
 05h	BYTE	flag: 00h inactive, 01h active
 06h	BYTE	write protection (00h none, 01h full, 02h pseudo)
 07h	BYTE	saved (00h some unsaved data, 01h all data saved)
 08h	BYTE	disk in memory (00h no, 01h yes)
 09h	WORD	EMS handle
 0Bh	WORD	XMS handle
 0Dh	BYTE	memory type used for disk (00h XMS, 01h EMS)
--------V-2FB000-----------------------------
INT 2F - DOS 3.3+ GRAFTABL.COM - INSTALLATION CHECK
	AX = B000h
Return: AL = status
	    00h not installed, OK to install
	    01h not installed, not OK to install
	    FFh installed
Notes:	called by DISPLAY.SYS
	documented for DOS 5.0, but undocumented in prior versions
SeeAlso: AX=2300h,AX=2E00h,AX=B001h
--------V-2FB001-----------------------------
INT 2F - DOS 3.3+ GRAFTABL.COM - GET GRAPHICS FONT TABLE
	AX = B001h
	DS:BX -> DWORD buffer for address of 8x8 font table
Return: buffer filled
	AL = FFh
Note:	PC-DOS 3.30/4.01 and MS-DOS 6.0 set the font table offset to 0130h,
	  MS-DOS 3.30 sets it to 0030h
SeeAlso: AH=2Eh"GRAFTABL",AX=B000h
--------I-2FB400-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - INSTALLATION CHECK
	AX = B400h
Return: AL = FFh if installed
--------I-2FB401-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - GET HOST BUFFER ADDRESS
	AX = B401h
Return: ES -> host screen buffer (PC ASCII format)
	ES unchanged if communications not started
--------I-2FB402-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B402h
	BX = ???
Return: ???
--------I-2FB403-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B403h
	???
Return: ???
--------I-2FB404-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B404h
	???
Return: ???
--------I-2FB405-----------------------------
INT 2F - IBM PC3270 EMULATION PROG v3 - ???
	AX = B405h
	???
Return: ???
--------f-2FB700-----------------------------
INT 2F - APPEND - INSTALLATION CHECK
	AX = B700h
Return: AL = status
	    00h not installed
	    FFh installed
Note:	MS-DOS 3.30 APPEND refuses to install itself when run inside TopView or
	  a TopView-compatible environment
SeeAlso: AX=B702h
--------f-2FB701-----------------------------
INT 2F U - APPEND v3.21 only - GET APPEND PATH
	AX = B701h
Return: ES:DI -> active APPEND path
Notes:	the only version of APPEND known to support this call is the APPEND
	  shipped with Microtek MS-DOS 3.21; MS-DOS 3.30-6.00 APPEND displays
	  "Incorrect APPEND Version" and aborts the caller
	use AX=B704h first, and only call this function if that one is not
	  supported
SeeAlso: AX=B700h,AX=B704h
--------f-2FB702-----------------------------
INT 2F - APPEND - GET VERSION
	AX = B702h
Return: AX = FFFFh if not DOS 4.0 APPEND (also if DOS 5.0 APPEND)
	AL = major version number
	AH = minor version number, otherwise
SeeAlso: AX=B700h,AX=B710h
--------f-2FB703-----------------------------
INT 2F U - DOS 3.3, DOS 5.0 APPEND - HOOK INT 21
	AX = B703h
	ES:DI -> INT 21 handler APPEND should chain to
Return: ES:DI -> APPEND's INT 21 handler
Note:	each invocation of this function toggles a flag which APPEND uses to
	  determine whether to chain to the user handler or the original
	  INT 21
SeeAlso: AX=B700h,AX=B706h
--------f-2FB704-----------------------------
INT 2F - DOS 3.3+ APPEND - GET APPEND PATH
	AX = B704h
Return: ES:DI -> active APPEND path (128 bytes max)
Note:	some versions of append do not support this call, and return ES
	  unchanged; in this case, you should call AX=B701h to get the APPEND
	  path
SeeAlso: AX=B701h
--------f-2FB706-----------------------------
INT 2F - DOS 4.0+ APPEND - GET APPEND FUNCTION STATE