On Sun, 18 Apr 1999, Ethan Dicks wrote: > > The NTSC VIC-20 runs at the same speed at the NTSC C64... > > I don't think that's correct. In my original 1541 manual, it mentions the > U+ and U- commands to change the IEEE speed to match VIC-20 or C-64 speeds. Aren't they UI- and UI+? Anyway, Richard is correct. The reason why those commands were introduced is that the C64 has bad lines (video DMA that will occasionally interrupt the processor) while the VIC-20 does not. If you blank the screen of an NTSC C64, it will run at the same speed as an NTSC VIC-20. Marko - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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