On 09/12/2012 10:27 PM, email@example.com wrote: > > On 2012-09-03, at 05:38, Segher Boessenkool wrote: > >>> It should be easy to come up with a circuit that does the same thing, take the crystal clock and divide by 2.25 (for PAL). The 8701 does that by doubling and then dividing by 4.5 (PAL). >> >> Note it doesn't actually divide by 4.5; it divides unevenly. The >> datasheet shows how exactly (we have checked it with pictures of >> the die, it does what the datasheet says). > > What does this exactly/practically mean? Will it matter if I somehow divide the xtal just by 2.25? Does one have to care about the relation of the phases of both outputs? > There was some reason why they didn't use 2 crystals in the C64 but had to have the color clock and the dot clock be related to each other. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-09-12 21:00:27
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