Hi Steve,

I will be the last person on the planet to proclaim himself 'guru' in any other sense than 'teacher' :o), but I've worked with MACHs and glued them successfully to an 8051 derivative (Cygnal, actually). Which tools do you use? Lattice's DesignExpert software is pretty good. Perhaps we should take the discussion off-line, since it is not particulary on-topic (for shame Mr. Moderator! ;o) ). I can send you some sample code.

Some added nit-picking (sorry Andy!): A MACH is a CPLD, not an FPGA.

Best regards,
Rob.