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Old 25 March 2016, 21:59   #11
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,542

HAM on/off is separate enable bit.

Technical detail: OCS/ECS HAM is always enabled when HAM enable bit is set, bitplane count is ignored. (for example some demos use "HAM4" or "HAM5" modes) but AGA only enables HAM mode if HAM enable bit is set AND bitplane count is 6 (=OCS/ECS compatible HAM6 enabled) or 8 (=AGA HAM8 enabled).
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