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Routines |
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Used by the routine at JumpTable_AdvanceEntity.
Advances an entity by its stored deltas.
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| Advance_Entity | 63492 | LD C,(IX+0) | C=the column and B=the row. | |||||||||||||||
| 63495 | LD B,(IX+1) | |||||||||||||||||
| 63498 | LD A,(IX+8) | Add *IX+8 to the fine-X. | ||||||||||||||||
| 63501 | ADD A,(IX+2) | |||||||||||||||||
| 63504 | CP 8 | Jump to Advance_Entity_Branch2 if the fine-X is still in range. | ||||||||||||||||
| 63506 | JR C,Advance_Entity_Branch2 | |||||||||||||||||
| 63508 | CP 128 | Jump to Advance_Entity_Branch if the entity moved left. | ||||||||||||||||
| 63510 | JR NC,Advance_Entity_Branch | |||||||||||||||||
| 63512 | INC C | Step the column two right, then... | ||||||||||||||||
| 63513 | INC C | |||||||||||||||||
| Advance_Entity_Branch | 63514 | DEC C | ...one left. | |||||||||||||||
| 63515 | AND %00000111 | Keep only bits 0-2. | ||||||||||||||||
| Advance_Entity_Branch2 | 63517 | LD E,A | Store the fine-X. | |||||||||||||||
| 63518 | LD A,(IX+9) | Add *IX+9 to the fine-Y. | ||||||||||||||||
| 63521 | ADD A,(IX+3) | |||||||||||||||||
| 63524 | CP 8 | Jump to Advance_Entity_Branch4 if the fine-Y is still in range. | ||||||||||||||||
| 63526 | JR C,Advance_Entity_Branch4 | |||||||||||||||||
| 63528 | CP 128 | Jump to Advance_Entity_Branch3 if the entity moved up. | ||||||||||||||||
| 63530 | JR NC,Advance_Entity_Branch3 | |||||||||||||||||
| 63532 | INC B | Step the row two down, then... | ||||||||||||||||
| 63533 | INC B | |||||||||||||||||
| Advance_Entity_Branch3 | 63534 | DEC B | ...one up. | |||||||||||||||
| 63535 | AND %00000111 | Keep only bits 0-2. | ||||||||||||||||
| Advance_Entity_Branch4 | 63537 | LD D,A | Store the fine-Y. | |||||||||||||||
| 63538 | RET | Return. | ||||||||||||||||
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View the equivalent code in Booty.
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