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V9990 and VGA tradeoffs

by Eugeny_Brychkov on 21-02-2023, 18:19
Score: 188.07 %, Type: Forum topic , Comments: 2 comments
Would you be comfortable having VGA output, but missing interlaced and 424-line modes, and PAL 50 Hz mode? In other words - having progressive scan @ 60 Hz only? Can you elaborate a bit more? Can you elaborate a bit more? Are you perhaps ...

Is there any software built for V9990 for 50 Hz and interlaced modes?

by Eugeny_Brychkov on 11-02-2023, 21:00
Score: 187.41 %, Type: Forum topic , Comments: 3 comments
I read LCD flickers at 50 Hz. Interlaced modes are not supported, progressive scan modes only. Is there any sense making software for these modes? Or, slightly different, but related question - is support for 50 Hz mode and interlaced scan vital and ...

V9990 help needed - picture size mapping to VGA

by Eugeny_Brychkov on 10-02-2023, 09:56
Score: 187.12 %, Type: Forum topic , Comments: 0 comments
I am analyzing the V9990 datasheet . It has some very valuable information, some is missing, some must be guessed. At present I am trying to figure out how to map V9990 modes into the VGA timing. The most data intensive at RGB555 modes are ...
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