Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!unmvax!pprg.unm.edu!hc!lll-winken!uunet!mcvax!ukc!etive!djm
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.
Lines: 26

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