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poke(0x5f2d, 1) -- enable devkit input mode
stat(30) -- read keyboard had input (bool); repeats every 4 frames after key held for 15 frames
stat(31) -- read keyboard character
stat(32) -- read x coord
stat(33) -- read y coord
stat(34) -- read button bitmask; 1 = primary, 2 = secondary, 4 = middle

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poke(0x5f2c, 0) -- standard, 128x128
poke(0x5f2c, 1) -- horizontal stretch, 64x128
poke(0x5f2c, 2) -- vertical stretch, 128x64
poke(0x5f2c, 3) -- zoomed, 64x64
poke(0x5f2c, 4) -- standard, 128x128
poke(0x5f2c, 5) -- mirror left half
poke(0x5f2c, 6) -- mirror top half
poke(0x5f2c, 7) -- mirror top-left quarter

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-- run pico-8 as root ("sudo pico-8")
-- 128 pin values in the range [0..255]
poke(0x5f80, value) -- send value to gpio0
peek(0x5f81) -- get value from gpio1