Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!uklirb!gerten
From: gerten@uklirb.informatik.uni-kl.de (Rainer Gerten)
Newsgroups: comp.os.os2
Subject: Re: Some questions about PS/2 model 55
Summary: Look at the technical reference of Mod. 55
Message-ID: <2438@uklirb.informatik.uni-kl.de>
Date: 20 Feb 90 13:00:28 GMT
References: <2996@draken.nada.kth.se>
Reply-To: gerten@uklirb.informatik.uni-kl.de (Rainer Gerten)
Organization: University of Kaiserslautern, W-Germany
Lines: 21

In article <2996@draken.nada.kth.se> (Christian Wettergren) writes:
>1. How do I get an IO-port and an interrupt-channel on PS/2s. I need a rather
>   technical explanation, because I have to code that part. (Isn't the MCA in-
>   -volved in some way??)
>2. What interrupt-controllers do you have on an PS/2? Is it the same structure
>   that the old AT has (no, how strange?) with a master PIC and a slave PIC?
>   Is it the MCA that selects IRQ-channel or is it some other interface?
>I've been looking all over our library, but I can't find anything at all...
>Should I look in some particular book, paper etc etc...

As far as I know, the PS/2-machines are quite upward compatible to the
IBM AT in their structure, but far more flexible (and software-programmable).
For getting information about the interrupts and the io-ports, you should
look in the "Personal System /2 model 55 technical reference" and the 
"Personal System /2 bios reference manual". There are a lot of other book
around, but I use these two quite often.

Rainer Gerten
University of Kaiserslautern
West-Germany
mail: gerten@uklirb.informatik.uni-kl.de