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Routines |
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Used by the routine at GameLoop.
Turn the first word token into a verb and run its action.
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Set up to search the verb word tokens table for the first word token.
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| HandlerMatchVerb | B753 | LD HL,($AEEA) | Set a pointer to the verb-token pointer in HL. | |
| B756 | LD BC,($AEF4) | Load the verb-token count tokens into BC for the search. | ||
| B75A | LD A,($AF2E) | Get the the first word token from the user input. | ||
| B75D | CPIR | Search the verb word tokens table for a matching token. | ||
| B75F | JR Z,VerbMatched | Jump to VerbMatched if a match was found (Z flag is set). | ||
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The token doesn't match any verb.
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| B761 | LD HL,$AF59 | Print "I don't understand." and start a new line. | ||
| B764 | CALL PrintStringAndANewline | |||
| 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,($AEF4) | Calculate the verb index: A=the verb-token count-C (total tokens minus remaining tokens after match). | |
| B76B | SUB C | |||
| B76C | DEC A | Adjust the index (decrease by one, as indices are zero-based). | ||
| B76D | LD E,A | Store the verb index in E for the table lookup. | ||
| B76E | LD IX,($AEE4) | Set a pointer to the verb-jump pointer 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 |