I've had a bit of spare time to fiddle. I now have 6 MHz running nicely (actually 6.2MHz). Screen issue resolved (was a different problem). Also serial port is working. TSDOS at 6MHz is.. fast!
I won't go into the details yet, as I have poked around a bit here and a bit there. When I'll do a good summary once I have it well understood. Some comments though. The original main rom and typical M100 RAMs are pretty slow. Hard to go fast with 200nsec or 250 nsec ram/rom. Addressing the slow parts seems to be working well. * faster main rom is pretty easy. Just get a fast Eprom, like a TEEPROM etc. * faster RAM == REXCPM (plugs in, no problem) Next hurdle is 8MHz (actually 8.23MHz). (my clock circuit gives me divide ratios of 49.454MHz) /6 = 8.23, /8 = 6.17, /10 = 4.94 etc) Steve
