On 5 Sep 2007 at 16:33, Chris M wrote:
We could be
getting our lines crossed here. Typically
these things are called
"coprocessors". I defy that
designation. Granted there could be some offloading of
instructions (sort of kind of like what happens w/an
onboard 8087), but regardless, the objective is to
replace the 8088. I had been wondering if there were
boards for a pc that supplemented the operation of the
onboard mpu by providing another processor
altoghether, and in no way replacing the old 8088,
thereby in effect giving you 2 pc's in one. Of course
there were z80 boards, 68k? boards that accomplished
this.
The Intel Inboard 286 or 386 PC/XT? IIRC, the 8088 booted, then
turned over the bus to the 286 or 386. I don't know if there were
any applications that switched between the two, but I don't doubt
that one could devise an application such that one or the other would
be running.
I do recall the "This will not run on an Inboard 286!" notices,
however.
Cheers,
Chuck