Flag bit(s) Meaning
0-2 GCOL action
0 Overwrite
1 Disjoin (OR)
2 Conjoin (AND)
3 Exclusive Disjoin (EOR)
4 Invert screen
5 Identity (No change)
6 Conjoin Negation (AND with NOT sprite colour)
7 Disjoin Negation (OR with NOT sprite colour)
3 GCOL action applied with mask
4 Use palette instead of translation table when plotting 1/2/4/8bpp to 16/32bpp (3.50+)
5 Translation table is 'wide' (3.60+)
6 Dither when plotting a 16 or 32bpp sprite into a reduced depth (3.60+)
7 Use colourmapping (16/32bpp only) function in R7 (Select 2, 5.22+)
8-15 Translucency (0=opaque, 255=nearly transparent) (Select 2, 5.22+)
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