Thank you for your reply. It's really a pity that the DAC has such limitations. I'll stick to 640x480 for the VGA output then

Hello!, Fantastic work. I was tinkering with these registers myself, but I really struggle to find good information about how VGA or CRT works, if you could give me some advice in that regard, so I can understand better how you came up with these numbers for the different resolutions I'll appreciate...