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Toni Wilen · 04 September 2021, 08:17

ECS Agnus implements DIWHIGH V11 start (bit 3) and stop bit (bit 11). They are not documented in HRM ECS chapter. (V10 is documented as highest vertical bit)

AGA reuses them as superhires resolution horizontal bits. (H0)

04 September 2021, 08:17	#258
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,545	Diwhigh v11 ECS Agnus implements DIWHIGH V11 start (bit 3) and stop bit (bit 11). They are not documented in HRM ECS chapter. (V10 is documented as highest vertical bit) AGA reuses them as superhires resolution horizontal bits. (H0)