I think you need to be realistic about why some TV's can't display these non standard outputs. How interlace works is based on the simple design of the first tv's. The scan down the screen is constant (during display and horizontal refresh) so lines are higher on the left than the right. The vblank happening in the middle of a line means that when it returns to the top, it starts displaying the extra half line and when it returns to the left after the half line then it's at a different "Y" position than if it had displayed a complete line. It's when TV's started getting "clever" and not just use the timing from the signal to drive the tube that incompatibilities started. I don't think there is anything you can do to work around this clever ness other than producing a 100% compliant NTSC/PAL signal and that isn't possible without using a frame buffer. A composite or Y+C to VGA line doubler is probably where you'll end up. On 12/01/2015 19:43, silverdr@wfmh.org.pl wrote: > if the final frame rate differs because of this (I can imagine it not > differing despite the half-line difference) then that would be a > show-stopper. Message was sent through the cbm-hackers mailing listReceived on 2015-01-13 10:00:04
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