240p video

Taken from http://retrogaming.hazard-city.de/ as a stub

Most of the classic systems use a non-interlaced 15kHz output which is compatible to the classic TVs we all had at home in the 80s and 90s. That's usually between 220 and 240 lines of visible video, along with 280 to 330 pixels of horizontal resolution. In the 90s 480i output became popular. It provides 480 lines of resolution (but only 240 lines per field = at a time) at 640 to 720 pixels of horizontal resolution. A handful of SNES games used this mode (Ranma 1/2), some Saturn games (Columns Collection), quite some PSOne games (Tobal 2) and actually most of the PS2 games out there. While in theory 240p games don't have to be deinterlaced, 480i can be converted to 480p in a lot of different ways, providing different qualities in the result. 240p games run at 15khz as well and have still to be "upconverted" to 480p (31khz). Many newer TVs won't accept 240p on their component inputs. That's why it's often not an alternative to use a RGB Scart to Component (available for $50 to $100, e.g. from CYP) on those new TV sets.