Problem with DMA Programming

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Article #727

#727

From: Abdul Halim Che Ali
Date: Tue, 09 Oct 1990 09:54

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Hi netters

I have been trying unsuccesfully to program DMA chip - 8237 (channel 3). I
try to write a value into the channel 3 - Base and Current Address Register
(06H), and Base and Current Word Count Register (07H) but I do not get the same
value when I read the registers back.

Another problem is that there is a software command code to clear byte pointer
flip/flop but it does not specify what data to write into that register.

Is there any specific routine/sequence that has to be done to program other
registers such as command, mode, request and mask?

Thanks in advance.  BTW, I don't have on-line access to USENET news, so
please respond by email.

Halim

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mimos!rangkom!halim
From: halim@rangkom.MY (Abdul Halim Che Ali)
Newsgroups: comp.sys.intel
Subject: Problem with DMA Programming
Message-ID: <295@rangkom.MY>
Date: 9 Oct 90 09:54:19 GMT
Organization: MIMOS, Malaysia
Lines: 18