Re: How does NTSC VIC-II produce 65 cycles per line

>
>
> > On 12 Jan 2023, at 12:21, Michiel Boland <michiel_at_boland.org> wrote:
> >
> > Hi. The PAL VIC-II chip has 9 bits for the X coordinate. That can
> accommodate 504 pixels (63 cycles) per line. I would assume that the NTSC
> VIC-II also has only 9 bits for X coordinate. Then how does that chip
> manage to produce 65 cycles per line? Since 520 pixels would require 10
> bits.
>
> FWIW - a number of cycles per line (in every version) do not output any
> pixels
>

I know that when one changes from / to NTSC they have to change both the
crystal and the VIC-II chip, so maybe understanding the relationship
between these two might answer your question?  This is a guess, I am not an
electrical engineer. :-)
Bill