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Routines |
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Used by the routine at 36203. On entry, A holds a room layout byte, rotated such that the bit-pair corresponding to the tile of interest is in bits 0 and 1.
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36288 | AND 3 | Keep only bits 0 and 1; A=0 (background), 1 (floor), 2 (wall) or 3 (nasty) | |||||||||
36290 | LD C,A | Multiply by 9 and add 160; now A=160 (background), 169 (floor), 178 (wall) or 187 (nasty) | |||||||||
36291 | RLCA | ||||||||||
36292 | RLCA | ||||||||||
36293 | RLCA | ||||||||||
36294 | ADD A,C | ||||||||||
36295 | ADD A,160 | ||||||||||
36297 | LD E,A | Point DE at the attribute byte for the background, floor, wall or nasty tile (see 32928) | |||||||||
36298 | LD D,128 | ||||||||||
36300 | LD A,(DE) | Copy the attribute byte into the buffer at 24064 | |||||||||
36301 | LD (IX+0),A | ||||||||||
36304 | INC IX | Move IX along to the next byte in the attribute buffer | |||||||||
36306 | RET |
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