Den Sun, 3 Sep 2017 00:10:38 +0200 skrev Gerrit Heitsch <firstname.lastname@example.org>: > On 09/02/2017 11:58 PM, Mia Magnusson wrote: > > > > But isn't this even how the clock in a C64 is already? We know that > > the h-sync frequency is wrong to avoid some PAL dot crawl. (Dot > > crawl is kind of a feature of PAL...). > > I thought dot crawl happens if pixel clock and color clock are not in > sync? Like on a ZX Spectrum. With the discrete PLL in the C64 (and > later the 8701), dot clock and color clock are in sync and that > prevents dot crawl. Yes, but AFAIK a correct PAL clock cannot be evenly divided to get a correct PAL h-sync. (you need fractions in the divisor). Thus dot crawl in a correct PAL signal. 15625 * 284 = 4437500 = too high 15625 * 284 = 4421875 = too low -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2017-09-02 23:00:41
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