Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rutgers!cmcl2!sbcs!sbpmt!altman
From: altman@sbpmt.cs.sunysb.edu (Jeff Altman)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Expansion boxes for PS/2 series
Message-ID: <1990Aug1.204341.14909@sbcs.sunysb.edu>
Date: 1 Aug 90 20:43:41 GMT
References: <0093A4B6.3F34E260@KING.ENG.UMD.EDU> <13035@sun.udel.edu> <43483@apple.Apple.COM>
Sender: usenet@sbcs.sunysb.edu (Usenet poster)
Organization: State University of New York at Stony Brook
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I just spoke with the people that make the Transformer II.
The way the expansion kit works is as follows.  There is a 
MCA board which is installed in the computer with a cable
to an expansion box.  The box contains 8 8-bit ISA slots.
For every board that you install in the kit you must know
what interrupt is being used, and all memory locations. 
this information is then installed in the PS/2 memory by
using the Reference Disk and an Option file which comes with
the box.  The installed board translates all calls via the 
interrupts and/or memory locations and sends them to the 
expansion box.  No DMA is supported.  

IT sounds nice, however, at $1600 for the box you might as well
buy a new machine.

- Jeff (jaltman@ccmail.sunysb.edu)