Routines
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F487: Jump forward in the command list if the boys' skool door or the gate is closed
Used by command list 0x4C. Saves ALBERT a trip to the skool gate or the skool door if it's already closed.
Input
H 0xCD (ALBERT)
F487 LD DE,$7FF4 7FF4 holds the door/window status flags
F48A CALL $627D Collect the next byte (the door identifier) from the command list
F48D EX DE,HL
F48E AND (HL) Set the zero flag if this door is closed
F48F EX DE,HL
F490 JR NZ,$F499 Jump if the specified door is open
F492 LD B,$0A Move along 10 places in the command list
F494 CALL $627D
F497 DJNZ $F494
F499 JP $638C Move to the next command in the command list
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