On 2/25/2018 3:36 PM, Michał Pleban wrote: > Hello! > > Jim Brain wrote: > >> Scope trace shows a delay of ~17nS > If the clock is at 2 MHz, then half a clock cycle is 250 nS, therefore > 17 nS is 1/15 th of the cycle, correct? > > I can imagine a 32 MHz crystal and a 4-bit counter in the CPLD which is > synchronized with the incoming PHI2 but generates PHI0 for the 6502 > which is shifted back 1/16 th of cycle. The incoming PHI0IN of the 6502 needs to be shifted "forward" by 17nS. That's tougher than just shifting it back. I am going to look at PHI1 inverted and see if I can use that to signal the start of the cycle. Jim Message was sent through the cbm-hackers mailing listReceived on 2018-02-25 23:04:13
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