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From: cmi@dartvax.UUCP (Theo Pozzy/R. Green)
Newsgroups: net.micro.cpm
Subject: Need Kaypro technical help
Message-ID: <2566@dartvax.UUCP>
Date: Wed, 14-Nov-84 12:36:25 EST
Article-I.D.: dartvax.2566
Posted: Wed Nov 14 12:36:25 1984
Date-Received: Fri, 16-Nov-84 01:36:19 EST
Distribution: net
Organization: Dartmouth College, Hanover, NH
Lines: 17

I am looking for some help with the Kaypro 2,4,10 line of micros.
I am trying to implement interrupt-driven serial I/O routines,
and am running into troubles.  I know that the Kaypros use Z80
SIO chips, which I am familiar with, but I do not know what
I am allowed to do with the interrupt structure.  In particular,
I don't know which interrupt mode would be best to use (0,1, or 2),
and I don't know if I am going to interfere with the Kaypro BIOS.
I have tried numerous things, and it looks like the Kaypro is
doing bank-select operations.  The problem occurs when I get
an interrupt and the banks are swapped, since my interrupt handling
code does not exist in the other bank.  Can anyone provide me
with some sample code or information on how to do this?  Thanks
in advance.

Theo Pozzy
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