Jet Set Willy: Routine at 36288

| Routines

36288: Copy a room attribute byte into the buffer at 24064

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.
Input
A | Room layout byte (rotated)
IX | Attribute buffer address (24064-24575)
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 |