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Routines |
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Updates an entity of the type 14 which is made by UpdateSaucerEntity. The entity falls until its third coordinate reaches 259.
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| UpdateShotEntity | 40518 | LD A,(IX+22) | Read field 22 of the entity. | |||||
| 40521 | AND %11110000 | Keep the counter. | ||||||
| 40523 | JR Z,UpdateShotEntity_Fall | Jump to UpdateShotEntity_Fall if it is zero. | ||||||
| 40525 | CALL DecreaseEntityCounter | Call DecreaseEntityCounter to count down. | ||||||
| 40528 | JP UpdateEntity_Project | Jump to UpdateEntity_Project to carry on updating the entity. | ||||||
| UpdateShotEntity_Fall | 40531 | LD A,(IX+8) | Fetch the first byte of the third coordinate of the entity. | |||||
| 40534 | DEC A | Subtract one. | ||||||
| 40535 | JR NZ,UpdatePuffEntity_Test | Jump to UpdatePuffEntity_Test unless it was 1. | ||||||
| 40537 | LD A,(IX+9) | Fetch the second byte of the third coordinate of the entity. | ||||||
| 40540 | CP 3 | Jump to UpdatePuffEntity_Test if it is 3 or more. | ||||||
| 40542 | JR NC,UpdatePuffEntity_Test | |||||||
| 40544 | LD (IX+9),3 | Set the second byte of the third coordinate to 3. | ||||||
| 40548 | XOR A | Set A to zero. | ||||||
| 40549 | LD (IX+18),A | Set field 18 of the entity to zero. | ||||||
| 40552 | LD (IX+19),A | Set field 19 of the entity to zero. | ||||||
| 40555 | JR UpdatePuffEntity_Test | Jump to UpdatePuffEntity_Test. | ||||||
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