Richard wrote:
[Please do not mail me a copy of your followup] mjmahon@aol.com spake the secret code <FoOdnWD5gdbjNijeRVn-pQ@comcast.com> thusly:As Linards points out, the Apple ][ had color long before the Commodore computers. And it was able to do so without using any more memory than for a monochrome display. It's color is all NTSC "artifact" color--an extremely clever design in 1977, inspired by video games.What's "artifact color"?
Color which is displayed as a result of a monitor's interpretation of a pixel pattern which is synchronous with the color subcarrier frequency. It is often seen as false color appearing when a fine vertical monochrome "grating" is shown on an NTSC monitor--like a finely striped tie, shirt, or coat. Several machines harness this effect to produce color displays. It can also be envisioned simply as a digital synthesis of a combined chrominance/luminance composite video signal, but the usually very simple combination of patterns of fixed-width, bi-level pulses at a multiple of the subcarrier frequency, in which the pallette of colors have simple phase relationships, is normally described as "artifact" color. -michael Music synthesis for 8-bit Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it is seriously underused."