21 Nov
2007
21 Nov
'07
11:22 p.m.
Chuck Guzis wrote:
On 20 Nov 2007 at 14:47, Chris M wrote:
Or the rather sizeable number of IBM PS/2 Model 25s and 30s.
Peace... Sridhar
to what degree was it homebuilt? Do you mean
simply
assembled from parts? Who made the mobo if that was
the case. I only know of 1 non-8088 mobo (of course
there could have been others).
The V30 was not an "upgrade" in the traditional sense--it was a pin-
for-pin CMOS replacement for the 8086. Because of some internal
architectural features, it ran somewhat faster than an 8086 of the
same clock speed and implemented many of the 186 instruction set
additions. It also had an emulation mode for running 8080 code.
There were more 8086 mobos than you might imagine. Consider, for
example, the Stearns PC. Since there was a CMOS 80C86 available
before the 80C88, the 8086 also found its way into several laptops.