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Routines |
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Used by the routine at HandlerObjects.
Erases an object that is no longer in view and empties its slot. An empty slot is handled by the pause loop at HandlerObjects_EmptySlot instead.
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| EraseObject | 27410 | LD A,(HL) | Fetch the sprite ID of the object. | |||||||
| 27411 | AND A | If A is zero then the slot is empty, so jump to HandlerObjects_EmptySlot. | ||||||||
| 27412 | JR Z,HandlerObjects_EmptySlot | |||||||||
| 27414 | PUSH BC | Stash BC and HL on the stack. | ||||||||
| 27415 | PUSH HL | |||||||||
| 27416 | PUSH HL | Point IX at the object (using the stack to do so). | ||||||||
| 27417 | POP IX | |||||||||
| 27419 | CALL StoreEntity | Copy the position and sprite ID of the object using StoreEntity. | ||||||||
| 27422 | CALL RemoveEntity | Call RemoveEntity to erase the object from the screen. | ||||||||
| 27425 | POP HL | Restore HL from the stack. | ||||||||
| 27426 | XOR A | Set A to 0 ready to empty the slot. | ||||||||
| 27427 | LD (HL),A | Empty the slot by clearing the sprite ID of the object. | ||||||||
| 27428 | INC HL | Increment HL by one. | ||||||||
| 27429 | LD (HL),A | Write 0 to the next byte of the object. | ||||||||
| 27430 | INC HL | Increment HL by one. | ||||||||
| 27431 | LD (HL),A | Write 0 to the final byte of the object. | ||||||||
| 27432 | POP BC | Restore BC from the stack. | ||||||||
| 27433 | JR NextObject_2 | Jump to NextObject_2. | ||||||||
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