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45447: Routine at B187
Used by the routine at 45082.
45447 LD A,(38573) A=38573.
45450 NEG
45452 DEC A
45453 LD E,A
45454 LD A,(IX+1)
45457 LD C,A
45458 DEC A
This entry point is used by the routine at 45471.
45459 AND %00001111 Keep only bits 0-3.
45461 LD B,A
45462 LD A,C
45463 AND %11110000 Keep only bits 4-7.
45465 OR B
45466 LD (IX+1),A
45469 JR 45384 Jump to 45384.
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