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From: chetl@daisy.tamu.edu (Chet Laughlin)
Newsgroups: comp.os.msdos.programmer
Subject: Re: 8088 vs 8086
Message-ID: <17641@helios.TAMU.EDU>
Date: 21 Jun 91 20:05:37 GMT
References: <1722@balrog.ctron.com> <1991Jun21.153305.23525@maytag.waterloo.edu> <1606@cvbnetPrime.COM>
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Organization: College of Architecture, Texas A&M University.
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In article <1606@cvbnetPrime.COM> kanderse@money.UUCP (Kurt Andersen) writes:
>In article <1991Jun21.153305.23525@maytag.waterloo.edu> dmurdoch@watstat.waterloo.edu (Duncan Murdoch) writes:
>>Nope, the XT was 8088 based as well.  I can't think of any machine that
>>IBM released that used the 8086, though one of the early PS/2 machines
>>may have.
>>Duncan Murdoch
>>dmurdoch@watstat.waterloo.edu
>As I recall the first verrsion of the IBM pc used 8086.
>This version failed and was shortly followed by the
>8088 version of the IBM pc.
>Every so often you here about someone looking for IO cards
>for an original IBM pc.  The 8086 IBM pc had a different
>bus design then the popular IBM pc.
>-Kurt

I can't vouch for the red carpet/blue carpet story, but
the first IBM PCs did use Intel 8086s.  They also had
cassette ports in the back, as some of you may recall.
The machine is called a PC-1 internally by IBM hardware
reps.  The motherboard came with 256K of RAM if I remember
right, and could hold 512k.  The PC-2 came out later,
and had an Intel 8088.  There was room on the motherboard
for 640k and the cassette port had dissappeared - but 
Basic still supports it...

As for the bus design, I really can't remember anymore
if there was a difference between the 8088 and 8086
versions.  I do know you could place the same mono or 
CGA cards in either machine and they worked fine.  I'd
have to pull out a schematic for both before making any
definite calls.  Anyone else remember when you got a
schematic for the machine when you bought one.  (a little
nostalgia never hurt)  oh yes, and BIOS listings to boot
in the Tech manuals.

No PS/2 or PS/1 machines used the 8088.

-Chet Laughlin