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Routines |
| Prev: B560 | Up: Map | Next: B5A4 |
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Used by the routines at Handler_DispatchPhrase, Action_Light, Action_Rub, Action_Say and Action_Attack.
Match Phrase Tokens.
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| MatchPhraseTokens | B575 | EX DE,HL | Move the phrase token pointer into DE. | |||||||||
| B576 | JR MatchPhraseTokens_Next | Start the match at the first pattern byte, MatchPhraseTokens_Next. | ||||||||||
| Match_PhraseTokens_Loop | B578 | INC DE | Advance DE to the next byte. | |||||||||
| MatchPhraseTokens_Next | B579 | LD HL,$AF2F | Point HL at the second word token. | |||||||||
| B57C | JR Match_PhraseTokens_Compare | Compare the command from its first word at Match_PhraseTokens_Compare. | ||||||||||
| MatchPhraseTokens_Loop | B57E | INC HL | Advance HL to the next byte. | |||||||||
| B57F | INC DE | Advance DE to the next byte. | ||||||||||
| Match_PhraseTokens_Compare | B580 | LD A,(DE) | Read the next vocabulary byte into A. | |||||||||
| B581 | CP (HL) | Branch to MatchPhraseTokens_Loop when the byte at HL means the values match. | ||||||||||
| B582 | JR Z,MatchPhraseTokens_Loop | |||||||||||
| B584 | CP $FE | Branch to Match_PhraseTokens_Alternative when FE means the values differ. | ||||||||||
| B586 | JR NZ,Match_PhraseTokens_Alternative | |||||||||||
| B588 | LD A,(HL) | Accept the phrase when the command has ended. | ||||||||||
| B589 | CP $FF | |||||||||||
| B58B | RET | |||||||||||
| Match_PhraseTokens_Alternative | B58C | CP $FD | Branch to Match_PhraseTokens_Skip when FD means the values differ. | |||||||||
| B58E | JR NZ,Match_PhraseTokens_Skip | |||||||||||
| B590 | LD A,(HL) | Match this alternative when the command has ended, and try the next one when the player typed another word. | ||||||||||
| B591 | CP $FF | |||||||||||
| B593 | JR NZ,Match_PhraseTokens_Loop | |||||||||||
| B595 | RET | |||||||||||
| Match_PhraseTokens_Skip | B596 | INC DE | Advance DE to the next byte. | |||||||||
| B597 | LD A,(DE) | Read the next vocabulary byte into A. | ||||||||||
| B598 | CP $FE | Branch to Match_PhraseTokens_Done when FE means the values match. | ||||||||||
| B59A | JR Z,Match_PhraseTokens_Done | |||||||||||
| B59C | CP $FD | Branch to Match_PhraseTokens_Skip when FD means the values differ. | ||||||||||
| B59E | JR NZ,Match_PhraseTokens_Skip | |||||||||||
| B5A0 | JR Match_PhraseTokens_Loop | Try the next phrase alternative at Match_PhraseTokens_Loop. | ||||||||||
| Match_PhraseTokens_Done | B5A2 | OR A | Test A so the following branch can see whether it is zero. | |||||||||
| B5A3 | RET | Return. | ||||||||||
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View the equivalent code in;
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