Category: <b>TSR libraries</b>
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<pre><b>INT 2F - TesSeRact RAM-RESIDENT PROGRAM INTERFACE</b>

	AX = 5453h
	BX = subfunction
	    00h installation check
		CX = 0000h
		DS:SI -&gt; 8-char blank-padded name (see <a href=../../it/40/28.html>#02840</a>)
		Return: AX = FFFFh installed
				CX = ID number of already-installed copy
			AX = anything else, not installed
				CX = ID number for TSR when installed
	    01h get user parameters
		CX = TSR ID number
		Return: AX = status
			    0000h successful
				ES:BX -&gt; user parameter block (see <a href=../../it/41/28.html>#02841</a>)
			    nonzero failed
	    02h check if hotkey in use
		CL = scan code of hot key (see <a href=../../it/06/0.html>#00006</a>)
		Return: AX = FFFFh hot key conflicts with another TSR
			     otherwise safe to use the hotkey
	    03h replace default critical error handler
		CX = TSR ID number
		DS:SI -&gt; new routine for INT 24h
		Return: AX = nonzero, unable to install new handler
	    04h get internal data area
		CX = TSR ID number
		Return: AX = status
			    0000h successful
				ES:BX -&gt; TSR's internal data area (see <a href=../../it/42/28.html>#02842</a>)
			    nonzero, TSR not found
	    05h set multiple hot keys
		CX = TSR ID number
		DL = number of additional hot keys to allocate
		DS:SI -&gt; table of hot keys
			BYTE  hotkey scan code (see <a href=../../it/06/0.html>#00006</a>)
			BYTE  hotkey shift state
			BYTE  flag value to pass to TSR (nonzero)
		Return: AX = nonzero, unable to install hot keys
	    06h - 0Fh reserved
	    10h enable TSR
		CX = TSR ID number
		Return: AX = nonzero, unable to enable
	    11h disable TSR
		CX = TSR ID number
		Return: AX = nonzero, unable to disable
	    12h unload TSR
		CX = TSR ID number
		Return: AX = nonzero, invalid TSR number
		Note: if any interrupts used by TSR have been grabbed by
			another TSR, the TesSeRact routines will wait until
			it is safe to remove the indicated TSR from memory
	    13h restart TSR
		CX = TSR ID number of TSR which was unloaded but is still in
		     memory
		Return: AX = nonzero, unable to restart TSR
	    14h get status word
		CX = TSR ID number
		Return: AX = FFFFh invalid ID number
			   = other, successful
				BX = bit flags
	    15h set status word
		CX = TSR ID number
		DX = new bit flags
		Return: AX = nonzero, unable to set status word
	    16h get INDOS state at popup
		CX = TSR ID number
		Return: AX = 0000h successful
			    BX = value of INDOS flag
	    17h - 1Fh reserved
	    20h call user procedure
		CX = TSR ID number
		ES:DI -&gt; user-defined data
		Return: AX = 0000h successful
	    21h stuff keystrokes into keyboard buffer
		CX = TSR ID number
		DL = speed
		    00h stuff keystrokes only when buffer is empty
		    01h stuff up to four keystrokes per clock tick
		    02h stuff up to 15 keystrokes per clock tick
		DH = scan code flag
		    if zero, buffer contains alternating ASCII and scan codes
		    if nonzero, buffer contains only ASCII codes
		SI = number of keystrokes
		ES:DI -&gt; buffer to stuff
		Return: AX = 0000h success
			     F0F0h user aborted with ^C or ^Break
			     other unable to stuff keystrokes
	    22h (v1.10) trigger popup
		CX = TSR ID number
		Return: AX = 0000h success, TSR will either pop up or beep to
				   indicate that it is unable to pop up
			     nonzero invalid ID number
	    23h (v1.10) invoke TSR's background function
		CX = TSR ID number
		Return: AX = 0000h success
			     FFFFh not safe to call background function
			     nonzero invalid ID number
	    24h - 2Fh reserved
Notes:	Borland's THELP.COM popup help system for Turbo Pascal and Turbo C
	  (versions 1.x and 2.x only) fully supports the TesSeRact API, as
	  do the SWAP?? programs by Innovative Data Concepts.
	AVATAR.SYS supports functions 00h and 01h (only the first three fields
	  of the user parameter block) using the name "AVATAR  "
SeeAlso: AX=CAFEh,INT 16/AX=55FFh,INT 2D"AMIS"
Index:	installation check;TesSeRact TSR interface|uninstall;TesSeRact

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