Date: 2002-04-22 12:10:21
Hallo John, > Now my memory fails me... the 6502 outputs the clock on a > couple of pins, to feed to other devices that might need > it. Does the 6510 do the same? An addition to Gideons answer: the input of a 6502 is called PHI0 (PHI zero). The 6502 outputs TWO clock signals: PHI1, the inverse of PHI0, and PHI2, a delayed version of PHI0. There is a delay between the flanks of PHI0 and PHI1. Never measured it exactly but I thougt it was about 12 ns. Some computers don't need PHI1. The first model of the VIC-20, the one with only 2114-SRAMs, doesn't need it. Its successor, the one with 2K*8 SRAMs, does. ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing list
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