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Routines |
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Used by the routine at 61440. Periodically checks whether any open doors need closing, and closes them.
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| 61764 | LD A,(HL) | Collect the current value of the main loop task timer from 32681 | ||||||
| 61765 | AND 15 | Is it time to close any currently open doors? | ||||||
| 61767 | RET NZ | Return if not | ||||||
| 61768 | LD L,250 | HL will be used to index the door status flags at 32752 | ||||||
| 61770 | DEC L | Point HL at the status flags for the next door | ||||||
| 61771 | BIT 4,L | Have we checked every door yet? | ||||||
| 61773 | RET Z | Return if so | ||||||
| 61774 | LD A,(HL) | Pick up the status flags for this door | ||||||
| 61775 | AND 7 | Is the door currently closed? | ||||||
| 61777 | JR Z,61770 | If so, jump back to check the next door | ||||||
| 61779 | DEC (HL) | Decrement the door close delay timer in bits 0-2 of the status flags | ||||||
| 61780 | DEC A | Is it time to close the door? | ||||||
| 61781 | JR NZ,61770 | If not, jump back to check the next door | ||||||
| 61783 | PUSH HL | Save the door status flags pointer | ||||||
| 61784 | CALL 61696 | Close the door and update the screen refresh buffer | ||||||
| 61787 | POP HL | Restore the door status flags pointer to HL | ||||||
| 61788 | JR 61770 | Jump back to check the next door | ||||||
| Prev: 61696 | Up: Map | Next: 61790 |