|
Routines |
| Prev: 50464 | Up: Map | Next: 50553 |
|
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.
|
||||
|
Set up to search the verb word tokens table for the first word token.
|
||||
| Handler_MatchVerb | 50518 | LD HL,(48422) | Set a pointer to *Pointer_VerbWordTokens in HL. | |
| 50521 | LD BC,(48428) | Load *Count_VerbTokens tokens into BC for the search. | ||
| 50525 | LD A,(48486) | Get the *UserInput_Token_1 from the user input. | ||
| 50528 | CPIR | Search the verb word tokens table for a matching token. | ||
| 50530 | JR Z,VerbMatched | Jump to VerbMatched if a match was found (Z flag is set). | ||
|
The token doesn't match any verb. Display an error message: "I don't understand.".
|
||||
| 50532 | LD HL,48529 | HL=Messaging_IDontUnderstand. | ||
| 50535 | CALL PrintStringAndNewline | Call PrintStringAndNewline. | ||
| 50538 | RET | Return. | ||
|
A verb was matched! Calculate its index in the table and jump to its handler routine.
|
||||
| VerbMatched | 50539 | LD A,(48428) | Calculate the verb index: A=*Count_VerbTokens-C (total tokens minus remaining tokens after match). | |
| 50542 | SUB C | |||
| 50543 | DEC A | Adjust the index (decrease by one, as indices are zero-based). | ||
| 50544 | LD E,A | Store the verb index in E for the table lookup. | ||
| 50545 | LD IX,(48416) | Set a pointer to *Pointer_JumpTable_Verbs in IX. | ||
| 50549 | CALL GetTableEntry | Call GetTableEntry to get the address of the verb handler routine for this index. | ||
| 50552 | JP (HL) | Jump to the verb handler routine to execute the command. | ||
| Prev: 50464 | Up: Map | Next: 50553 |