If you create a 624 line frame, made up of two fields that are 312 lines each then it's not a valid PAL signal and no tv will think it's interlaced. To make it interlaced you have to alternate between vsync happening at the end of the last line and in the middle of the last line. To keep the speed right you'd be alternating between 311.5 & 312.5 lines, which isn't valid PAL either and so may work better or worse than the standard c64 signal based on what equipment you are using. The same problem exists for NTSC but with different numbers. PAL also has the problem of alternating phase, which you'll probably need to take into account. On 10/01/2015 12:12, Ingo Korb wrote: > The PAL VIC-II outputs 312 lines per frame according to the table shown > at [1], so if you convert those two into fields you end up with 624 > lines per field instead of the 625 that PAL specifies. For NTSC the > result would be 526 lines instead of 525. Message was sent through the cbm-hackers mailing listReceived on 2015-01-10 13:01:21
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