English Amiga Board - View Single Post - HAM6 on AGA in WinUAE displays incorrectly

Toni Wilen · 25 March 2016, 21:59

Yes.

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).

25 March 2016, 21:59	#11
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,529	Yes. 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).