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Moulinaie wrote:If you consider that pixels should be squares : 320/200 = 1,6 for the ratio.
joefish wrote:Yes, it's a bit of a shame they're not square. The ZX81 / ZX Spectrum / MSX-1 / Oric have square pixels with a 256x192 display which is exactly a 4:3 ratio. On a lot of CRT TVs, that meant that their pixels aligned perfectly with the dots on the TV screen (although this could drift over time with RF modulator noise).
The ST aligns in height since the scanline spacing on a TV is the same, but in width it has 320 pixels in roughly the same space, so the pixels are squashed. Same happens with the Amiga, CPC and C64 in their equivalent resolutions.
joefish wrote:And it does work - hook up a ZX81 to a good-quality CRT TV like my old Sony 14", bypassing the RF modulator to get a composite signal, and you can draw a chessboard 10101010 / 01010101 pixel pattern on the screen with no distortion. Do it with an ST and you get vertical bands of blurring.
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