Routines
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50320: Parser: Validate Input Tokens
Output
A The number of references to items in the user input tokens
F The zero flag is set when there is only a verb present
F The zero flag is unset when there is at least one valid direct
object
F The carry flag is set when the command is malformed
The first token is the verb, so target the second token for the direct object.
Parser_ValidateInputTokens 50320 LD A,(48487) Fetch the second token from the user input and store it in A.
50323 CP 255 Return if there is no second token.
50325 RET Z
There is a second token; so validate all direct objects after this point.
50326 CALL Parser_CountItems Call Parser_CountItems.
50329 RET NZ Return if there is at least one valid item mentioned in the user input tokens.
Any references are invalid.
Print "Please rephrase that.".
50330 CALL Response_PleaseRephraseThat Call Response_PleaseRephraseThat.
50333 SCF Set the carry flag.
50334 RET Return.
View the equivalent code in;
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