🚀 go-pugleaf

JK>I've seen a few postings over the past few days requesting info on how to
JK>program the PC's DMA and interrupt hardware.  A good book to check out (in
JK>fact the only book I've found so far) is Lewis Eggebrecht's "Interfacing to
JK>the IBM Personal Computer".  It is a SAMS book, ISBN 0-672-22722-3, costs
JK>about $25.00.  Be sure to get the second edition as it covers the AT and
JK>PS/2 lines as well as the XT.

The DMA controller used by the PC on up is the Intel 8273A (or compatible).

The proper place to get information on this chip is the Intel data sheet.
Information on the interface between the controller and the machine can be
had in the PC or AT (or PS/2) tech refs.  The controller is implemented quite
differently on the AT, dunno about the PS/2, so be sure to get what's
appropriate.

chris.sokol@factory.com

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