Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!ucbvax!decwrl!jumbo!ehs
From: ehs@jumbo.dec.com (Ed Satterthwaite)
Newsgroups: comp.sys.atari.8bit
Subject: Re: Atari 800XL Parallel Bus Documentation
Summary: some old Antic references
Keywords: 800XL PARALLEL BUS PORT
Message-ID: <13549@jumbo.dec.com>
Date: 1 Feb 89 04:10:59 GMT
References: <307@ultb.UUCP>
Organization: DEC Systems Research Center, Palo Alto
Lines: 22

There was a series of articles in Antic about the XL parallel bus
interface.  Here are the notes that I made at the time:

The Parallel Bus Revealed
	Earl Rice
	Antic, January 1985, 45-47, 75	(generic device handler)
	Antic, February 1985, 68-71	(hardware interface)
	Antic, March 1985, 69-72, 76	(design of serial I/O board)
	Antic, April 1985, 49-52, 78	(ditto, plus software driver)

	Specifications for the parallel bus interface and Generic Parallel
        Device Handler provided in XL-series machines.  Example project
	is hardware (USART) and software (MAC/65) for a serial interface.
	All articles are full of obvious typos, esp. the diagrams.

I think Earl Rice had been associated with Atari engineering.  As I
recall, the articles were not exactly lucid but started making sense after
several readings.  I don't know if or how back issues of Antic are
available.

Ed Satterthwaite
ehs@src.DEC.COM or {...}!decwrl!ehs