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From: zhou@brazil.psych.purdue.edu (Albert Zhou)
Newsgroups: comp.lang.pascal
Subject: Re: re bios data area (keyboard buffer)
Message-ID: <11465@j.cc.purdue.edu>
Date: 11 Nov 90 07:12:46 GMT
References: <1990Nov11.042645.16676@ux1.cso.uiuc.edu>
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Reply-To: zhou@brazil.psych.purdue.edu (Albert Zhou)
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Organization: Purdue University
Lines: 13


	It is possible to extend the keyboard buffer. I found $40:$80
contains the beginning address of the keyboard buffer (the default is
$40:$1E, of course), and $40:$81 the end. However, you have to know
which area in the segment of $40 is unused so that you can set a new
keyboard buffer to there.   
	After my original posting, I have tried to send a 10-character
string to the buffer at $40:$1E, and at the same time set $40:$1A to
be $40:$1E (the buffer head) and set $40:$1B to be $40:$32 (that's 
$1E+20 because 10 characters take 20 bytes). I haven't got desired 
result. The 10-character string was output on the screen, but followed
by dozens of strange characters (probably some ^G since it kept beeping).
What's the problem?