--- On Sun, 7/24/11, Chuck Guzis <cclist at sydex.com> wrote:
I don't doubt that you had early access to the
Pentium CPUs
at IBM,
but that doesn't quite settle the issue.? We were
fooling with? pre-
release steppings of the 80286 when IBM was shipping 64K
5150s with
the 8088.
Which is a different discussion altogether. I neither care what systems utilized
overdrive processors (in a discussion of Pentium "firsts") - you can always
retrofit a box w/some *official* or aftermarket cpu upgrade (for instance there was a 3rd
party 486 retrofit for 286 based machines, though likely came out a good while after
_actual_ 486 boxes were shipping, and even machines like the ALR 386 offering was
supposedly geared towards running a 486, but I don't know the details. Maybe it just
had the main guts on a card). But...since you brought it up - and this is a
vintage/historic forum, I doubt I've received answers to the questions of which were
the earliest machines/upgrades/cpu cards/sbc's used the 8086/8 and 80286 uPs. As far
as IBM is concerned, I suppose the Displaywriter is the first 8088 based system. That
would be a relevant discussion. Another question - did 8086/8 upgrades to 8085s predate
from the ground up 8086/8 based boards? Since
most of the support chips are interchangeable, I would think yes. But personally I
don't know of any.