16-05-2022, 11:54 AM
I'm thinking this is a sync issue (see my reply in the other thread again) as you are only setting # displayed characters and not the full CRTC table.
Only setting the displayed character registers will (most likely, depending on the previous screen mode used) leave some timing registers incorrect for 64*16 mode.
Only setting the displayed character registers will (most likely, depending on the previous screen mode used) leave some timing registers incorrect for 64*16 mode.