System timer reprogramming

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#2174

From: Dave Denson
Date: Wed, 12 Sep 1990 11:21

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I need to find out how to reprogram the IBM clock-tick timer to a faster rate.
Norton's Programming Guide gives little or no information on this.  I plan
to use int 08h to decrement a one-byte timer for game clocking purposes.

I can handle the programming to call the default int 08h handler at the proper
rate, but I'm not sure which ports (40h and 41h?) are used for the actual
setting of the clock rate.  I need a tick at 32 times the normal rate.

I would greatly appreciate any help,
		Dave

--
Dave Denson (densond@prism.cs.orst.edu) Consultant, UCS/Kerr Microcomputer Lab
"At a certain age some people's minds close up;
they live on their intellectual fat."      -- William Lyon Phelps

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!snorkelwacker!mit-eddie!rutgers!orstcs!prism.CS.ORST.EDU!densond
From: densond@prism.CS.ORST.EDU (Dave Denson)
Newsgroups: comp.os.msdos.programmer,rec.games.programmer
Subject: System timer reprogramming
Message-ID: <20232@orstcs.CS.ORST.EDU>
Date: 12 Sep 90 11:21:45 GMT
Sender: usenet@orstcs.CS.ORST.EDU
Reply-To: densond@prism.CS.ORST.EDU (Dave Denson)
Distribution: na
Organization: Oregon State Univ. -- Computer Science
Lines: 15