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From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: Re:  Driver for an apollo/VME adaptor.
Message-ID: <9010161355.AA02311@richter.mit.edu>
Date: 16 Oct 90 13:55:04 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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Writing device drivers for the Apollo I/O bus requires
the General Purpose I/O (GPIO) optional product from HP/Apollo.
They provide sample device drivers with the library. Writing your
own driver is non-trivial, as there are timing errors, DMA differences,
and flat out bugs that varying according to both the CPU type (DN3000
vs 3010 vs 4000 vs 3500/4500) and OS revision level.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter.mit.edu@eddie.mit.edu
krowitz%richter.mit.edu@mitvma.bitnet
(in order of decreasing preference)