I was messing around with Pico and I've discovered a total of 6 new screen modes!! Please check
the GIF attached to see them in action. Some of them are sort of screen effects (mirror) but the others include
2x1 aspect ratio, 64 x 64 pixels and so on. I am so excited about this. I think this could change the look and feel of many games and makes Pico feel like the Amstrad CPC, C64 or other retro computers. I hope this is a feature and not a bug :)
I will post a cartridge soon.
I just added some more modes to the list on the wiki.
0 = normal mode
1 = horizontal stretch, 64x128px screen, left half of normal screen
2 = vertical stretch, 128x64px screen, top half of normal screen
3 = both stretch, 64x64px screen, top left quarter of normal screen
5 = horizontal mirroring, left half copied and flipped to right half
6 = vertical mirroring, top half copied and flipped to bottom half
7 = both mirroring, top left quarter copied and flipped to other quarters
65-71 = same as 1-7?
129 = horizontal flip
130 = vertical flip
131 = both flip
133 = clockwise 90 degree rotation
134 = 180 degree rotation (effectively equivalent to 131)
135 = counterclockwise 90 degree rotation
193-199 = same as 129-235?
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