On 07/11/2017 15:18, smf wrote: > > You don't need to do it in one line, you have the entire off screen > area to insert a half line. Obviously you then have to ignore vicii's > hsync pulses and provide your own. During that period the system clock > will need to run slower, which will affect sid/cia/cpu timing. But it > can be at a constant speed, and I'm not sure it would sound noticeably > wrong enough. > FWIW this is essentially how the PAL TurboGraphx consoles worked, they used the NTSC PC-Engine/TurboGrafx video chip with another chip that clock stretched the video/sound chip outside the visible area to add the extra scan lines. That seemed to work out reasonably well. Message was sent through the cbm-hackers mailing listReceived on 2017-11-07 16:01:52
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