Well, I think I may have mentioned this earlier, but my Heath H8 has a wire-wrapped (nearly obviously home-brewed) daughterboard added on to the CPU card. The main CPU used to be 8080, but the daughterboard holds a Z80 and a couple other things. It seems to work. That's the closest thing I've seen. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '