> On 2017-11-05, at 12:31, Mia Magnusson <mia@plea.se> wrote: > >> Yes, that's correct. Without supplying the external clock, there >> would be no genlocking. Without (eventually - we used component >> workflow wherever possible and as long as possible) external encoding >> there would be no actual PAL/NTSC encoded signal. > > To make things more complicated, there is a mode where Agnus switches > hsync and vsync to inputs. That way you could atleast in theory > generate video modes with different resolutions like a 40Hz mode with > over 300 visible lines. I don't know if anyone has tried this. It seems > like this was ment to be used for genlocking but then someone found out > that it works better to just PLL the system clock. These are two things of the same domain, not either or. You need both the correct scan rate and correct starting point/sync. Theoretically, I guess it could be (ab)used to generate some completely uncommon screen modes but never thought of/tried that. -- SD! - http://e4aws.silverdr.com/ Message was sent through the cbm-hackers mailing listReceived on 2017-11-05 16:03:56
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