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millfork/examples/x16/palette.mfk
2019-09-16 22:55:08 +02:00

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void main() {
word i
byte hn, ln
// 256-colour text mode for layer 0
vera_poke(VERA_LAYER_1, $21)
// 8×8 tiles, 64×64 tile map
vera_poke(VERA_LAYER_1+1, $35)
// 2× zoom in
vera_poke(VERA_COMPOSER_CTRL+1, $40)
vera_poke(VERA_COMPOSER_CTRL+2, $40)
i = 0
while i < $2000 {
vera_poke(i, $A0)
if i.lo & $7f < 64 {
ln = lo(i>>1) & $1f
hn = lo(i>>2) & $e0
vera_poke(i+1, hn | ln)
} else {
vera_poke(i+1, 0)
}
i += 2
}
while true {}
}