Xref: utzoo comp.binaries.ibm.pc.d:638 comp.sys.ibm.pc:17878
Path: utzoo!utgpu!water!watmath!watdragon!crocus!rmpinchback
From: rmpinchback@crocus.waterloo.edu (Reid M. Pinchback)
Newsgroups: comp.binaries.ibm.pc.d,comp.sys.ibm.pc
Subject: Using the DMA Controller in PCs and ATs.
Keywords: Intel 8237 DMA controller
Message-ID: <8166@watdragon.waterloo.edu>
Date: 8 Aug 88 20:39:57 GMT
References: <2988@nicmad.UUCP> <6240@chinet.chi.il.us> <8159@watdragon.waterloo.edu>
Sender: daemon@watdragon.waterloo.edu
Reply-To: rmpinchback@dahlia.waterloo.edu (Reid M. Pinchback)
Organization: U. of Waterloo, Ontario
Lines: 26

.
.
    I'm looking for source code or a reasonably detailed explanation of
how to use the DMA controller in my AT clone (or any other PC-type machine)
to do block moves of data.  I understand that the chip has four channels,
0 and 2 being used for refresh and disk transfers.  I don't have any of
those handy-dandy IBM Tech Ref manuals or Intel manuals, so if anybody
out there knows how to do this, could you either (a) send me a sample
of assembler that does this kind of block data move; or (b) post it to
the net so everybody could play with it.

     Thanks in advance,


          Reid


replies(usenet,R) :- usenet_addresses(R).
replies(bitnet,R) :- bitnet_addresses(R).

usenet_addresses("dahlia.waterloo.edu").
usenet_addresses("watmum.waterloo.edu").

bitnet_addresses("RMPINCHB@WATDCS.BITNET"). % WATDCS.NETNORTH for dumb mailers
bitnet_addresses("RMPINCHB@WATER.BITNET").  % WATER.NETNORTH   "    "     "