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Routines |
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Used by the routine at GameLoop.
Matches the first word token from the user's command against the verb word tokens table. If a match is found, it calculates the verb index and jumps to the corresponding verb handler routine. If no match is found, it displays "I Don't Understand" and returns.
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Set up to search the verb word tokens table for the first word token.
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| Handler_DispatchVerb | B753 | LD HL,($AEEA) | Set a pointer to *Pointer_VerbWordTokens in HL. | |
| B756 | LD BC,($AEF4) | Load *Count_VerbTokens tokens into BC for the search. | ||
| B75A | LD A,($AF2E) | Get the *UserInput_FirstToken from the user input. | ||
| B75D | CPIR | Search the verb word tokens table for a matching token. | ||
| B75F | JR Z,VerbMatched | Jump to VerbMatched if a match was found (Z flag is set). | ||
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The token doesn't match any verb. Display an error message: "I don't understand.".
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| B761 | LD HL,$AF59 | HL=Messaging_IDontUnderstand. | ||
| B764 | CALL PrintStringAndNewline | Call PrintStringAndNewline. | ||
| B767 | RET | Return. | ||
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A verb was matched! Calculate its index in the table and jump to its handler routine.
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| VerbMatched | B768 | LD A,($AEF4) | Calculate the verb index: A=*Count_VerbTokens-C (total tokens minus remaining tokens after match). | |
| B76B | SUB C | |||
| B76C | DEC A | Adjust the index (decrease by one, as indices are zero-based). | ||
| B76D | LD E,A | Store the verb index in E for the table lookup. | ||
| B76E | LD IX,($AEE4) | Set a pointer to *Pointer_JumpTable_Verbs in IX. | ||
| B772 | CALL GetTableEntry | Call GetTableEntry to get the address of the verb handler routine for this index. | ||
| B775 | JP (HL) | Jump to the verb handler routine to execute the command. | ||
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View the equivalent code in;
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| Prev: B714 | Up: Map | Next: B776 |