Jim Brain wrote > I don't think so. 6509 requires external clocks, but the 652 uses an > internal clock generator. I'd forgotten that -- sorry. What you did was worth a try. Tidy, too. Again I'll suggest an UN-tidy solution, a temporary one at least. Using a flying lead, is there a point on the motherboard that's a slightly earlier version of what gets applied to the Phi2 input (pin 40) of the 6509? If so, it could drive the 6502's Phi2 input (pin 37). Francesco Messineo wrote > on your setup the data bus on a write is asserted too late (in facts, > the data written is the "old" data bus value). Hmm, I'd be careful about such a conclusion. With samples taken on the RISING edge of Phi2, the data could easily be misleading. -- Sent from: http://cbm-hackers.2304266.n4.nabble.com/ Message was sent through the cbm-hackers mailing listReceived on 2018-02-26 00:00:35
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