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From: hutzley@bigq.dec.com (Steve Hutzley)
Newsgroups: comp.lang.c
Subject: Reading a port on the IBM/AT's DMA
Message-ID: <3361@ryn.esg.dec.com>
Date: 1 Nov 90 16:46:25 GMT
Sender: guest@ryn.esg.dec.com
Organization: Digital Equipment Corporation
Lines: 25


    Does anyone have any code or ideas on how I can read and log the
    information written and read from the IBM-PC/AT's DMA port 0x0E.

    I have an ALLOY TIP40 tape drive that talks directly to the DMA port to
    control the drive, and would like to rewrite the interface for the
    program in C myself to add some useabillity to it. I particulrly don't
    care for they're interface (IMO).

    I had an idea of using a TSR to constantly monitor the port and log the
    info to a file (like give the TSR 60% of the time slices and the rest
    to the tape program.)

    I have dis-assembled the program itself, but being very weak in
    assembly language, I didn't get much out of it, other than it was that
    port on the DMA. I cant tell what codes they are sending to the drive
    to control it.

    Any Ideas?


Steve
    DEC, Hudson, Ma.

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