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From: lairdt@mist.cs.orst.edu (Tom Laird)
Newsgroups: comp.sys.intel
Subject: 8031 port access
Message-ID: <1991Feb17.224750.6360@lynx.CS.ORST.EDU>
Date: 17 Feb 91 22:47:50 GMT
Sender: @lynx.CS.ORST.EDU
Organization: Computer Science Department, Oregon State Univ.
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Originator: lairdt@mist.CS.ORST.EDU
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I've been trying to find some info on how to access the data port(s) on an
8031.  All of the books that I have found are based on a Z80 or 8080, and
only give a generic IN and OUT op-code.  I have ports 0 and 2 used as the
data bus/address bus & address bus.  what I would like to do is find out
how to access port 1 (pins 1-8) for both input and output.

I might have overlooked something, but I'm hoping somebody can point out 
what I missed.  Any op-code examples would be VERY help full.  Thanks.