GFA Artist file format
GFA Artist *.ART Referred to as '1000-Colors OFF' in the manual. This format is similar to the format used in colorStar. 16 words palette 32000 bytes st low resolution screen dump ----------- 32032 bytes total file size Referred to as '1000-Colors ON' in the manual. This format is more complex because of the 1000 color mode. 1 word number of planes [4] 1 word unused (revered) 32000 bytes st low resolution screen dump 16 words normal palette used when 1000 color mode is off 16*69 words 69 palettes used when the 1000 color mode is on 1 long color cycling flag [0 = off, 1 = on] 1 long color cycling speed [0 to 20] 9 longs start palette number of 9 definable color cycling zones 9 longs end palette number of 9 definable color cycling zones 9 longs direction of the 9 definable color cycling zones [0 = off, 1 = forward, 2 = backwards] ----------- 34360 bytes total file size Regarding the '1000-Colors ON' mode. The layout of the rasters and how to calculate the color of a pixel at a given x/y coordinate is unknown.
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