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Path: utzoo!utgpu!water!watmath!clyde!rutgers!sri-unix!sri-spam!ames!sdcsvax!nosc!cod!bmarsh
From: bmarsh@cod.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: How do you flush the PC's keyboard?
Message-ID: <708@cod.UUCP>
Date: Tue, 2-Jun-87 13:13:03 EDT
Article-I.D.: cod.708
Posted: Tue Jun  2 13:13:03 1987
Date-Received: Thu, 4-Jun-87 05:48:36 EDT
References: <747@thumper.UUCP>
Organization: Naval Ocean Systems Center, San Diego
Lines: 36
Summary: Use the bdos() function.

In article <747@thumper.UUCP>, tr@thumper.UUCP writes:
 
> According to _Advanced MS-DOS_ by Ray Duncan, DOS function C (hex)
> resets the input buffer and then gets a character for input using one
> of five DOS functions.  They are 1, 6, 7, 8, and A (hex).

They always forget to add the fact that you can use this function with a
'function' of zero.  This will flush the keyboard input buffer, then return
without asking for a character, exactly as you wanted.

> I am using Lattice C.  Is there a standard way of doing this with C or
> Assembler?

	bdos(0x0c, 0x00, 0x00);

	or

	mov	ax,0c00h
	int	21h

> Thank you for your attention.  You people are great.

	Thanks.  (blush ;-)

> -- 
> Tom Reingold
> INTERNET:       tr@bellcore.bellcore.com
> UUCP: 		{seismo,ihnp4,ucbvax,decvax}!bellcore!tr
> 		{ulysses,allegra,clyde,princeton}!bellcore!tr

---------
Bill Marsh, Naval Ocean Systems Center, San Diego, CA
{arpa,mil}net: bmarsh@cod.nosc.mil
uucp: {ihnp4,akgua,decvax,dcdwest,ucbvax}!sdcsvax!nosc!bmarsh

"If everything seems to be coming your way, you're probably in the wrong lane."