Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice!sun-spots-request
From: shawnd@fs1.ee.ubc.ca
Newsgroups: comp.sys.sun
Subject: Simple Parallel I/O with the SCSI Bus
Keywords: Hardware
Message-ID: <317@brchh104.bnr.ca>
Date: 19 Nov 90 01:00:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sun-Spots
Lines: 16
Approved: Sun-Spots@rice.edu
X-Original-Date: Mon, 5 Nov 90 16:30:25 PST
X-Sun-Spots-Digest: Volume 9, Issue 369, message 15
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I am building a simple functional tester for digital IC's.  I would like
to use the SCSI port on a Sun 3/60 as a simple bidirectional 8-bit
parallel port. Can anybody give me some ideas on the easiest way to do
this? The device will be the only one on the SCSI bus, so it would be nice
if I could somehow avoid all of the bus arbitration complexities. Also, I
was wondering what kind of software would be necessary to access the port
at such a low level.

If this proves to be too difficult, then I will probably design an SBus
card for a SPARC. In this case, would I have to write a device driver, or
is there a simpler way to access an SBus card?

Shawn Day                                                     (604) 264-0024
#104-8777 Hudson Street                                 shawnd@fs1.ee.ubc.ca
Vancouver, British Columbia                  ...!ubc-cs!fs1.ee.ubc.ca!shawnd
Canada V6P 6H2