IBM PC DMA Controller

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Article #1895

#1895

From: D Murphy
Date: Fri, 14 Apr 1989 09:53

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Hello everybody.
Does anyone out there have an online copy of the data sheet for the DMA
controller used in the IBM PC ? I think this is an Intel 8237 (the number
may be wrong here but the idea is the same).
We did have a real paper copy here but have lost track of it. The information
I need is the method of telling the controller the memory address at which to
start a DMA operation. I think the registers for this are at I/O ports 0x00 to
0xFF, but I'm not certain and don't know which of these are used.

Thanks,


Murff....

JANET: djm@uk.ac.ed.etive          ARPA: djm%ed.etive@nss.cs.ucl.ac.uk   
       Murff@uk.ac.ed.emas-a             Murff%ed.emas-a@nss.cs.ucl.ac.uk
       trinity@uk.ac.ed.cs.tardis        trinity%ed.cs.tardis@nss.cs.ucl.ac.uk

D.J. Murphy
Chemistry Dept.
Univ. of Edinburgh

  "I don't want to achieve immortality through my work,
    I want to achieve it throught not dying."

                                            Woody Allen

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From: djm@etive.ed.ac.uk (D Murphy)
Newsgroups: comp.sys.intel
Subject: IBM PC DMA Controller
Message-ID: <1766@etive.ed.ac.uk>
Date: 14 Apr 89 09:53:37 GMT
Reply-To: djm@etive.ed.ac.uk (D Murphy)
Organization: Edinburgh Univ. Chemistry Dept.
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