Quote:
Originally Posted by Toni Wilen
New undocumented feature:
If both HAM and DPF bits are set (OCS/ECS): HAM logic gets strangely mixed with dual playfield.
- if HAM selection bits are zero: color selection uses dual playfield color selection logic.
- if HAM selection bits are non-zero: selected R/G/B component value is palette _index_ number of current pixel. In other words HAM planes 0 to 3 raw value is not used like normally but they are processed using dpf logic which returns palette index.
I am not sure why no one else has found (or reported) this. I also missed it when I tested weird combinations long, long time ago. Originally found by vAmiga author.
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sorry bit over my head, how many colours can you have on each playfield?