I've got a few things to talk about with artifacting, being an artist, I used to use artifacting for color in high-res on my 8-bit. But first, I want to point out that I have two 1200XLs and both of them output the green and purple scheme like the 65XE in the pictures above, not the blue and orange as shown for the 1200XL above. The 130XE I used to have ouput the blue/orange scheme. If I turn the tint way to one side or the other, I can get my 1200XLs to display the blue/orange that I prefer (in Ultima games for instance). One of my 1200XL's has the PAL Antic, the other is stock. The monitor I use is a Commodore 1084S. I used to use a TV or Commodore 17XX series monitor for a while with the 130XE when i owned it..
Another thing I feel needs mentioning, is that it's possible to get more than just the blue/orange or green/purple colors from artifacting, there is a high-res art program for the 8-bits, I forget the name now, which had a variety of patterns to choose from, that with the positioning of pixels and artifacting, one was able to have about colors total, IIRC. I think I remember an option to change pixel offset when drawing that allowed to mix artifacting too, creating multiple colors. I remember besides the usual blue/orange that I could get a yellow, a light green, a purple and orange/red shades, all slightly different from the green/purple and orange/blue artifact colors. Lines drawn when doing this would be thicker/thinner depending on the color you wanted to acheive. I will have to find this program to share here.
The last thing is that I always thought that not only the computer's circuitry, but also the tv/monitor had to do with causes of artifacting. I heard once that the artifact colors observed had to do with the dot density and pitch of the electron gun to the screen as to the color of artifacts seen too on many tv/monitors.
Edited by Gunstar, Fri Oct 26, 2012 6:48 PM.