*updating* 8088's

[Fred Cisin]

On Tue, 20 Nov 2007, Alexis wrote:
> I'd like to see an 80286 to 80486 upgrade card. It would need to somehow
> multiplex the 32-bit bus onto the 16-bit bus, perhaps running the
> multiplexing process at double the CPU clock speed. The SX wasn't 16-bit was
> it? Or am I thinking of the 386SX. If it's 16-bit it wouldn't need
> multiplexing.

Depending on how you DEFINE "16 bit", the 80386SX is a 16 bit version of
the 32 bit 80386[DX].  It therefore is "relatively" easy to retrofit it to
replace a 80286.

The 80486SX and 80486DX are the same bit sizes.  Their differences involve
whether or not the math FPU is included.

I ran an 80386 board in a 5150 (8088) machine.  There didn't seem to be
much point to it.