Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!osu-cis!sppy00!jmv
From: jmv@sppy00.UUCP (Jim Vickroy)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Clearing the keyboard buffer
Keywords: MSDOS, IBM PC (compatible), KEYBOARD BUFFEER
Message-ID: <69@sppy00.UUCP>
Date: 15 Mar 89 00:30:32 GMT
References: <1636@aucs.UUCP>
Reply-To: jmv@sppy00.UUCP (Jim Vickroy)
Distribution: na
Organization: Online Computer Library Center, Dublin, Ohio.
Lines: 42

In article <1636@aucs.UUCP> 840369k@aucs.UUCP (Elric Kinslayer) writes:

=>get "queued" into the keyboard buffer.  What's a quick and easy way
=>(assembly , turbo-pascal, or just poking memory) to clear the 
=>keyboard?  Net people with memory maps, any ideas?
=>

I'm not sure this is neither quick nor easy but here goes:

I am referencing the IBM Hardware Technical Reference: System BIOS (version
2.02)

	Set up a segment at 40H and setup your own BUFFER_HEAD and BUFFER_TAIL
	    at offset 1AH and 1CH
	Setup your own BUFFER_START and BUFFER_END at offset 80H and 82H

	;
	; Reset Keyboard
	;
		MOV	AX,BUFFER_START
		MOV	BUFFER_HEAD,AX

There is an interrupt function to reset the extended keyboard, however it
escapes me at the moment (I'm responding from home and won't be in the office
for a week). If no one responds by the time I return, I'll post the method. I
do remember I did it in C.

Good luck.

jim
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