My apologies for the delay, but getting the B128 out for testing is arduous. However, I have tested v4 of the PCB, with the following features: * Support for NMOS 6502, CMOS 65C02S, and CMOS 65C816S * Support for 4 or 8 bit PORT values o upper 4 bits are exposed on pads/pins on the unit. o system defaults to upper 4 bits masked to 0. Sending special values to $0001 will enable/disable functionality * PORT reflects '816 bank in '816 native mode (currently untested, as I don't have sample '816 native mode code) o $0000/$0001 registers disappear in native mode * System passes test suite. I have tested 3 CPUs here ('02, 'C02, and 'C816S) and all work, at least in emulation mode. Rockwell 'C02 continues to not work, but I will leave that as an exercise for others. Next steps: * Branch the code on github and put new HDL code up * Send working unit to Michal for additional testing/research. If there is enough interest, I'll have a batch made. Let me know off list. Jim -- Jim Brain brain@jbrain.com www.jbrain.comReceived on 2018-10-08 07:00:05
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