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Routines |
| Prev: 9B7F | Up: Map | Next: 9C41 |
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Used by the routines at PlaceCharacterBesideMatch and TestCharacterAgainstRoom.
Walks the character-id list at 9B7F and stops when the id matches either column, or when the list ends.
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| SearchPairTable | 9C07 | LD IX,$9B7F | Use the location pairs (9B7F). | |
| 9C0B | PUSH BC | |||
| 9C0C | LD B,A | |||
| SearchPairTable_Loop | 9C0D | LD A,(IX+$00) | Jump to SearchPairTable_TestStepSucceedsScript if this pair's first byte is the end marker FF. | |
| 9C10 | CP $FF | |||
| 9C12 | JR Z,SearchPairTable_TestStepSucceedsScript | |||
| 9C14 | LD A,B | Jump ahead to SearchPairTable_Next if this id matches the first room in this pair. | ||
| 9C15 | CP (IX+$00) | |||
| 9C18 | JR Z,SearchPairTable_Next | |||
| 9C1A | CP (IX+$01) | Jump ahead to SearchPairTable_TestAdvanceCharacterPair if this id does not match the second room in this pair. | ||
| 9C1D | JR NZ,SearchPairTable_TestAdvanceCharacterPair | |||
| 9C1F | LD A,C | Jump ahead to SearchPairTable_PairMatchedCaller if C is zero. | ||
| 9C20 | AND A | |||
| 9C21 | JR Z,SearchPairTable_PairMatchedCaller | |||
| 9C23 | CP (IX+$00) | Jump ahead to SearchPairTable_TestAdvanceCharacterPair if C does not match the first room in this pair. | ||
| 9C26 | JR NZ,SearchPairTable_TestAdvanceCharacterPair | |||
| 9C28 | JR SearchPairTable_PairMatchedCaller | Both rooms in this pair match, so accept the pair at SearchPairTable_PairMatchedCaller. | ||
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A zero in C, or a match in the second column, accepts the pair.
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| SearchPairTable_Next | 9C2A | LD A,C | Jump ahead to SearchPairTable_PairMatchedCaller if C is zero. | |
| 9C2B | AND A | |||
| 9C2C | JR Z,SearchPairTable_PairMatchedCaller | |||
| 9C2E | CP (IX+$01) | Jump ahead to SearchPairTable_PairMatchedCaller if C matches the second room in this pair. | ||
| 9C31 | JR Z,SearchPairTable_PairMatchedCaller | |||
| SearchPairTable_TestAdvanceCharacterPair | 9C33 | INC IX | Advance to the next character pair and keep looking. | |
| 9C35 | INC IX | |||
| 9C37 | INC IX | |||
| 9C39 | JR SearchPairTable_Loop | |||
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The pair matched, so return the id the caller passed in.
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| SearchPairTable_PairMatchedCaller | 9C3B | POP BC | Restore the id the caller passed in from the stack. | |
| 9C3C | RET | Return. | ||
| SearchPairTable_TestStepSucceedsScript | 9C3D | OR $01 | Reset the zero flag. | |
| 9C3F | POP BC | Restore BC from the stack. | ||
| 9C40 | RET | Return. | ||
| Prev: 9B7F | Up: Map | Next: 9C41 |