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From: ong@d.cs.okstate.edu (ONG ENG TENG)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: how to upgrade an old IBM pc?
Message-ID: <1991Jan19.183529.543@d.cs.okstate.edu>
Date: 19 Jan 91 18:35:29 GMT
References: <91018.222216RFM@psuvm.psu.edu>
Organization: Oklahoma State University
Lines: 21

From article <91018.222216RFM@psuvm.psu.edu>, by RFM@psuvm.psu.edu:
> Upgrading an *Original* IBM PC can be tricky re replacing Motherboards.
> Original PCs only come with 5 slots; one of biggest changes with
> the XT model is/was the 8-slot board & case.
>    If you're *hard-core* about your original PC, some points
> to make:
>    1. Hard to find a motherboard replacement: most are XT, with
>       8 slots.

DP Computer of Salt Lake City does sell a 5-slot motherboard with
286 processor.  It is actually called XT-286 motherboard, whereby
everything is XT (including disk controller, etc) but uses a 80286
for 3 times more computing power.  I used a 8-slot version of the same
XT-286 board for 3 years and it worked great (considering I was using
an original IBM PC before that).  But I must say that the first 
XT-286 motherboard DP sent me was bad and I had to send it back for
a replacement, which is still working today.  Operating speed wise
is goes up to 16MHz (mine is 8MHz).  I assumed that the 5-slot
version (for original IBM PC upgrade) works the same as the 8-slot version. 

E. Teng Ong (ong@d.cs.okstate.edu)