potatohead's Blog - Color Computer Artifacting (More colors)

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There are basically two approaches to artifacting on the color computer 3. My blog entries from before use the 640 pixel, 4 color mode to generate artifacts. That's a good palette, with lots of texture, some bright colors, some dim colors, but lacking in red, and generally kind of coarse in places. When artifacting in 640 pixel mode, the 4 grey scale values are used.

 

320 pixel mode artifacting is a bit different, because the computer has 4 bits per pixel avaliable, meaning colors can be mixed with other colors, and the intensity levels for a wider palette.

 

The 4 screenies attached are some samples that appear to support the idea that somewhere around 1024 colors are avaliable on the machine, with 256 on screen at any one time, unless scan line interrupts are used to dynamically change color registers, like we would do on Atari machines.

 

16 palette entries are available, each one can be set to one of 64 stock colors, meaning a scan line color change will impact multiple...

 

http://www.atariage.com/forums/blog/105/entry-6921-color-computer-artifacting-more-colors/