From since early 80's i'm curious about all 8bit computers, and the screen modes available from there.
And from other side, i saw the information from http://uzebox.org/wiki/index.php?title=Video_Modes
, which screen modes i saw as weird when compared with those 8bit and 16bit computers and consoles from 80's and 90's
Seeing that from 60hz displays (ntsc,brazilian pal-m, etc.) we have 720x480, and 720x576 on 50hz (pal-b/g, secam, etc.), which can mean as unlaced, 360x240 or 360x288 (when used display modes like taking 320x200, 320x256, 320x224, etc., from them - like C64, Atari 400/800, Atari-ST, Megadrive, etc.), or 270x240 or 270x288 (using 256x192, 256x224, 256x240, 256x256 - like MSX, Colecovision, MasterSystem, NES, SNES, etc.), or 180x240 or 180x288 (like 160x200, etc., from c64, vic20, Atari2600, etc.) - these width resolutions from Uzebox which doesn't fit on the usual 320, 256 or 160, like those 240 (from 270?), 144 (from 180?), 288 (from 360?), 170 (from 180?), 120 (from 135? (270/2) ), 360 (from 360?), or seems to provide large side borders
Do these screen mode resolutions are inside Atmega somehow, and impossible to change, or they are just the default ones, and can it be more flexible (just like Amiga screen modes)? What is the logic behind these screen modes, justifying them being just like that?