Quote:
Originally Posted by ppppenguin
Non-interlaced NTSC can't really exist. If it's not interlaced, it's not NTSC. By definition. You can have a nasty kludge with 262 or 263 lines scanned 60 times per second, along with NTSC 3.58MHz subcarrier.
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Early video games, like the Atari 2600, and various 80's era home computers did non-interlaced "NTSC". Interlace would have made ASCII characters on the TV screen hop up and down on the TV screen 30 times a second, and would be quite undesirable. Also TV sets of the time didn't care that it wasn't interlaced, as the vertical deflection only was coupled to the vertical sync pulses, and didn't care about the relationship to the horizontal sync. Later sets did have a horiz sync countdown to help time the vertical sync, but they also had an exception circuit to detect and allow non-interlaced vertical sync timing.