Post by johannesmutlu » Wed Oct 28, 2015 12:01 am

blargg wrote: It's progressive in the sense that it's not interlaced. Most (all?) NTSC TVs determine whether a field is even or odd by counting the scanlines of the previous field. If you output fields that all have the same number of scanlines, you trick the TV into becoming a non-interlaced 60 frames-per-second display with half the usual vertical resolution.

You know what,i first alway's tout that the nes could only view 30 frames per second and that it uses both the odd and even field from a crt tv set to do that at 240i,yeah i tout that the nes has a 3.2 pulldown filter to convert those 30 whole frames per second into 60 fields per second,by using 120 odd and 120 even fields to round up to 240 signal,to view those graphics in a letterbox way like the pal nes,but ,o,o,o,man what was i wrong because it turns out that those old crt tv sets are able to opperate in 240p modes by only using the odd or even fields and then refresh at 60 frames per second with added blacklines to it.So the nes is splitting it's graphics into odd or even fields instead and NOT use both of them.HOWEVER,this will be problematic for lcd screen since they don't recognize 240p signals being at 60 frames per second,so not only will it view those graphics incorrectly but also leaves a slight blur during motion, well that explains alot,since lcd screens were only designed with 480i signals at 60 fields per second in mind to be reconstructed/deinterlaced at 30 frames per second,so no luck for us retro gamers unless we get the frame meister wich is designed for 240p recognision.