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Routines |
| Prev: AB91 | Up: Map | Next: AC24 |
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Used by the routines at CopyDisplayIfNeeded and CheckDisplayMode.
Scans the character-id pairs at 994D for the two characters being compared, and stops at the zero word that ends the table.
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| MatchCharacterPair | ABF3 | CALL SaveTextPointer | Call SaveTextPointer, and call it again if it returns 80. | |
| ABF6 | CP $80 | |||
| ABF8 | CALL Z,SaveTextPointer | |||
| ABFB | LD A,B | Use the character pairs (994D). | ||
| ABFC | AND $0F | |||
| ABFE | LD B,A | |||
| ABFF | LD HL,$994D | |||
| MatchCharacterPair_Loop | AC02 | LD A,(HL) | Go to MatchCharacterPair_Next if this word is zero. | |
| AC03 | INC HL | |||
| AC04 | OR (HL) | |||
| AC05 | JR Z,MatchCharacterPair_Next | |||
| AC07 | LD A,B | Jump ahead to MatchCharacterPair_0 if this pair's first id differs. | ||
| AC08 | CP (HL) | |||
| AC09 | JR NZ,MatchCharacterPair_0 | |||
| AC0B | DEC HL | Jump ahead to MatchCharacterPair_CharacterScriptPosition if this pair's second id matches. | ||
| AC0C | LD A,C | |||
| AC0D | CP (HL) | |||
| AC0E | JR Z,MatchCharacterPair_CharacterScriptPosition | |||
| AC10 | INC HL | Step to the next character. | ||
| MatchCharacterPair_0 | AC11 | INC HL | Step to the next character pair and go back to MatchCharacterPair_Loop. | |
| AC12 | JR MatchCharacterPair_Loop | |||
| MatchCharacterPair_Next | AC14 | OR %00000001 | Reset the zero flag. | |
| AC16 | RET | Return. | ||
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Store this character's id and script position, then clear the link bit.
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| MatchCharacterPair_CharacterScriptPosition | AC17 | LD (IY+$00),C | Store BC at IY+00-01 and clear bit 1 of E. | |
| AC1A | LD (IY+$01),B | |||
| AC1D | RES 1,E | |||
| AC1F | CALL SaveTextPointer | Call SaveTextPointer to save the text pointer. | ||
| AC22 | XOR A | Clear A. | ||
| AC23 | RET | Return. | ||
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