Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!purdue!haven!uvaarpa!murdoch!davinci.acc.Virginia.EDU!tmb
From: tmb@davinci.acc.Virginia.EDU (Thomas M. Breeden)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: Buffering Keyboard Input
Message-ID: <1990Apr13.143302.25021@murdoch.acc.Virginia.EDU>
Date: 13 Apr 90 14:33:02 GMT
Sender: news@murdoch.acc.Virginia.EDU
Reply-To: tmb@davinci.acc.Virginia.EDU (Thomas M. Breeden)
Organization: University of Virginia
Lines: 24

My program is reading keyboard input character by character
via DOS function 7.

I find that the buffer BIOS(?) uses allows a typeahead of about
20 characters, ie, if I don't poll for a character often enough,
input will be lost.

What is a good way to get more typeahead buffer? 

I have been told about two absolute locations in the BIOS that hold the
buffer address and size, and that I might want to write to them. I
am reluctant to do this in case the program might halt without being
able to clean up. Is there a way to get this done by the system?

Do I have to write code to handle the keyboard interrupt itself? Would
this also require careful cleanup?

Please e-mail, if possible.

Thanks,

Tom Breeden
tmb@virginia.EDU   -> Internet
tmb@virginia       -> BITNET