[comp.sys.intel] 8031 port access

lairdt@mist.cs.orst.edu (Tom Laird) (02/18/91)

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.