I just purchased a 200mhz (686MX-PR200) cyrix motherboard.
It runs my old kernel just fine.  However,
when I rebuild it to max some buffers bigger
the resulting kernel would NOT boot.
It claimed that it needed to be built for
cyrix (I have 1.2.1 source).
How do I specify this? tHe following is
what does NOT work.

machine         i386            # architecture, used by config; REQUIRED

options         I386_CPU        # CPU classes; at least one is REQUIRED
options         I486_CPU
options         I586_CPU
options         MATH_EMULATE    # floating point emulation