Re: Port for keyboard indicator lights needed

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Article #3677

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#3677

From: Jerzy Tarasiuk
Date: Wed, 07 Oct 1992 19:45

42 lines
3084 bytes

Hello,
I suppose it is good idea to receive all data from KB in interrupts
and don't bother to check KB ctrlr output register is empty (input MUST
be checked). I included here an example program I wrote now just to test
if this algorithm works (and it is OK). An ACK received in interrupt
clears ack-wait flag and this is a signal to know ACK was received.
(in more advanced system may use other inter-process communication
to avoid wasting time while one process waits for the ACK from KB).
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end

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Message-ID: <JT.92Oct7204524@fizyk1.fuw.edu.pl>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!fuw.edu.pl!cocos!jt

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<1992Sep27.230227.19249@wam.umd.edu> <1992Sep28.155019.4253@ncsu.edu> <1992Sep29.003035.10991@wam.umd.edu> <4369@news.chips.com>

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Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!fuw.edu.pl!cocos!jt
From: jt@fuw.edu.pl (Jerzy Tarasiuk)
Subject: Re: Port for keyboard indicator lights needed
In-Reply-To: markst@chips.com's message of 29 Sep 92 21:03:55 GMT
Message-ID: <JT.92Oct7204524@fizyk1.fuw.edu.pl>
Sender: news@fuw.edu.pl
Nntp-Posting-Host: fizyk1
Organization: Warsaw University Physics Dept.
References: <1992Sep27.230227.19249@wam.umd.edu> <1992Sep28.155019.4253@ncsu.edu>
 <1992Sep29.003035.10991@wam.umd.edu> <4369@news.chips.com>
Distribution: comp
Date: Wed, 7 Oct 1992 19:45:24 GMT
Lines: 42

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