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On Wed, 1 Jun 2005, Adam Wozniak wrote:
> Here's a scanline...
> http://cuddlepuddle.org/~adam/oneline.gif
And slightly better:
http://cuddlepuddle.org/~adam/onelineb.gif
http://cuddlepuddle.org/~adam/onelineb.jpg
I'm running "Space Invaders" with the b/w switch on. When I turn on
colors I can't sync at all. Maybe I'm modulating too much.
I had some bad playfield logic which prevented pixels from being drawn
on the rightmost edge of the screen. When I fix that, I lose video
entirely. This leads me to believe something in my horizontal sync
still isn't right.
I've found different references for various voltage levels. One source
says black at .3, another .4, and another says "blank" at .40 and black
at .48, while some don't mention "blank" at all!
Here's what I'm using:
sync 0.000V
black 0.297V
lowest point of colorburst 0.155V
highest point of colorburst 0.44V
brightest white 0.918V
highest point of brightest color 1.061V
lowest point of brightest color 0.776V
Any help, advice, or references greatly appreciated.
- --
adam@xxxxxxxxxxxxxxxx http://cuddlepuddle.org/~adam
KG6GZR http://cuddlepuddle.org/~adam/resume.html
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