maple classic™ 
i kinda got my laptop to output a ntsc 480i signal right? pvm accuses no sync, i set +csync but i guess it's not actually outputting csync but rather only hsync and i do need a sync combiner circuit https://computerfairi.es/media/KEUdZ5jKAJy16xM35J0
i kinda got my laptop to output a ntsc 480i signal right? pvm accuses no sync, i set +csync but i guess it's not actually outputting csync but rather only hsync and i do need a sync combiner circuit https://computerfairi.es/media/KEUdZ5jKAJy16xM35J0
480i (525 lines) without vsync stays vertically stable but 240p (because it actually uses "262.5" lines instead of an integer number) keeps rolling so i couldn't get a 240p mode to work right
but if i get a sync combiner it might work!