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From: jhs@MITRE-BEDFORD.ARPA
Newsgroups: net.micro.atari8
Subject: Re: Help on adding I/O chips
Message-ID: <8605262210.AA05269@mitre-bedford.ARPA>
Date: Mon, 26-May-86 19:59:20 EDT
Article-I.D.: mitre-be.8605262210.AA05269
Posted: Mon May 26 19:59:20 1986
Date-Received: Tue, 27-May-86 07:41:00 EDT
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Organization: The MITRE Corp., Bedford, MA
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A friend of a friend designed a multi-function I/O board for the 800XL
recently.  Looking at the schematic diagram of the address decoding section,
it looks as though the region around $D100 - D1FF is probably pretty safe.
He decodes this whole block as though he plans to be able to use it for many
different devices.  I might be able to get more data on what he learned while
researching the project.

John Sangster
jhs@mitre-bedford.arpa