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Re: How does the apple2 RGB card work?



General_Failure wrote:
Basically, yes.  All Apple II color is "artifact" color resulting from
video signal pulses which contain 3.58MHz "color" information, in
various amplitudes and phases, causing an NTSC monitor to display color.


That explains the choice of NTSC then. It's not so easy to generate
colour artifacts with PAL.


Not really. In this part of the world NTSC is the only game in town. Only now that the flat (plasma and LCD) TVs are all digital they have PAL capability. In the 70s and 80s PAL capable TVs were vitrually non-existant in the US.

And the color encoding in PAL is only different from NTSC by changing the phase of the color carrier every line. So creating the same kind of PAL "artifacts" is almost as easy.

-Alex.