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Routines |
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Used by the routines at UpdateType19 and UpdateType14.
Counts down a timer for an object and, when it has expired, runs the behaviour code for its type from the table at BehaviourTable.
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| RunObjectBehaviour | 38879 | BIT 7,(IX+22) | Jump to RunObjectBehaviour_Run if bit 7 of the third state byte of the object is set. | |||||
| 38883 | JR NZ,RunObjectBehaviour_Run | |||||||
| 38885 | DEC (IX+21) | Count down the lifetime of the object. | ||||||
| 38888 | RET NZ | Return if it has not run out. | ||||||
| 38889 | LD A,(39884) | Fetch the second byte of the random seed. | ||||||
| 38892 | AND %00011111 | Keep five bits. | ||||||
| 38894 | INC A | Add one. | ||||||
| 38895 | LD (IX+21),A | Restart the lifetime of the object. | ||||||
| RunObjectBehaviour_Run | 38898 | LD A,(IX+0) | Fetch the type of the object. | |||||
| 38901 | SUB 19 | Subtract 19. | ||||||
| 38903 | LD C,A | Copy it into C. | ||||||
| 38904 | LD HL,39227 | Use the table at BehaviourTable. | ||||||
| 38907 | CALL GetTableEntry | Fetch the address of the code from the table. | ||||||
| 38910 | JP (HL) | Run it. | ||||||
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