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From: whit@milton.u.washington.edu (John Whitmore)
Newsgroups: comp.periphs.scsi
Subject: Re: Using SCSI as a Simple Parallel Output Port
Summary: 7-chip interface to SCSI
Keywords: Parallel, Output
Message-ID: <10547@milton.u.washington.edu>
Date: 4 Nov 90 00:26:07 GMT
References: <1430@fs1.ee.ubc.ca>
Organization: University of Washington, Seattle
Lines: 27

In article <1430@fs1.ee.ubc.ca> shawnd@chinook.ee.ubc.ca (Shawn Day) writes:
>Hello:
>
>I would like to use the SCSI port on a Sun/360 to output 8-bit
>digital data (sort of like a Centronics printer 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

	If your host Sun can be told to do programmed SCSI accesses
(single accesses, NOT complex operations like 'write to disk#6'), then
there's an article in _Circuit Cellar Ink_ for April/May 1990 that 
has the information you need (mainly; you'll need to figure out
the Centronics handshake).  Their output-only example takes seven
chips, has eight data and eight address bits output (you would use
the address bits for miscellaneous control lines).  Detecting 
error conditions on the Centronics port might be harder.  Don't
let the printer run low on paper!

	Back issues can be ordered from CCI;

		Circuit Cellar INK - Back Issues Sales
		4 Park Street
		Vernon, CT 06066
		(203) 875-2199
and they take Visa/MC/check; I think it's $4 per issue.

		John Whitmore