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On Sat, 12 Mar 2005, Eckhard Stolberg wrote:
> > I assume you're refering to this post from back in 1997?
> > http://www.biglist.com/lists/stella/archives/199705/msg00061.html
>
> Yes, that's what I'm referring too. Although I later found out
> that the shift actually is 17 pixels to the left in each scanline.
> Also the "missing" pixel always happens in the scanline that comes
> after a scanline where the missile was displayed over the first
> pixel of a playfield block.
Oi vey, did you get me started. I still don't have it figured out though.
I assume you've seen this:
http://www.biglist.com/lists/stella/archives/199804/msg00198.html
It seems that Brad was pretty thorough, at least with the P0/P1 moves.
He doesn't mention any 17 pixel moves though. Perhaps this chart is
different for M0/M1/BL ? Someone should perform the experiment.
What baffles me is that you're seeing a difference based on which SCANLINE
you're in. I don't think there's anyplace inside the TIA which actually
counts scanlines, or does anything different based on anything like that
(with the possible exception of the VDEL values, which I don't think is
an issue here). 76*3 = 228, so clk and phi0 should have the same phase
orientation at the beginning of each scanline.
- --
adam@xxxxxxxxxxxxxxxx http://cuddlepuddle.org/~adam
KG6GZR http://cuddlepuddle.org/~adam/resume.html
"Feminist? Why would I want to alienate half the population? I'm an egalitarian."
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