No, it's not just an optimization thing. E. g., the bswap command
that is used in the bytesex conversions is only available on 486s
and up.
> No. I double checked the FPU type and it is a 387 at the same
> speed as the CPU. However, I seem to remember 287s manufactured in 40
> pin dip format where the 387 is much larger... I doubt one _could_ use
> a 287 with a 386 motherboard.
Actually, I saw quite a few (Intel) 386 motherboards that had an 287
as FPU. It was sitting on a small piggy-back board along with 1 PAL
and was plugged into the 387 socket.
-- Hans-Joachim Widmaier