4 ms·
No flickering is an overstatement, but yes, the signal is 256x240 lines and alternating frames draw on alternating vertical lines of the 480 "visible" scanlines
by nicetryguy 6y ago
No flickering is an overstatement, but yes, the signal is 256x240 lines and alternating frames draw on alternating vertical lines of the 480 "visible" scanlines of a CRT (+/- minus overscan). The "no flickering" has more to do with the mental illusion of persistence of vision and the quality of the glowing phosphor on the glass excited by the beam on a particular CRT.
- ako 6y agoYes, any crt has flickering, but that is not relevant nor related to this approach. This approach ensures a sprite is drawn in the multiple places of a display every time the crt updates the display.