Routines
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A947: Condition: Parser Fails
Calls the parser check indexed in JumpTable_ParserChecks and succeeds when it returns with the carry set.
Stores A at ScriptParserResult.
Input
IX Pointer to the script entry (opcode, check index)
Output
F The zero flag is set when the check fails
The operand selects a parser check from JumpTable_ParserChecks.
Condition_ParserFails A947 LD E,(IX+$01) Fetch the check number (the operand) from *IX+01 into E.
A94A PUSH IX Stash IX on the stack.
A94C LD IX,$A779 Point IX at the parser-check jump table at JumpTable_ParserChecks.
Resolve the check routine address from that table.
A950 CALL GetTableEntry Call GetTableEntry.
Jump to that check, returning here at ParserFails_Return.
A953 LD DE,$A958 Push the return address ParserFails_Return onto the stack.
A956 PUSH DE
A957 JP (HL) Jump to the check routine held in HL.
The check returns here with its result in A and the carry flag.
ParserFails_Return A958 POP IX Restore the script pointer from the stack.
A95A LD ($A806),A Store the check's result at ScriptParserResult.
A95D JR NC,ParserFails_Passed Jump to ParserFails_Passed if the check passed (carry clear).
A95F XOR A Clear A and set the zero flag; the parser check failed, so this condition succeeds.
A960 JP RunScript_SkipCondition_TwoBytes Jump to RunScript_SkipCondition_TwoBytes.
The check passed, so force this "fails" condition to fail.
ParserFails_Passed A963 XOR A Clear A ready for RunScript_InvertConditionResult.
A964 CALL RunScript_InvertConditionResult Call RunScript_InvertConditionResult so the condition fails when the check passed.
A967 JP RunScript_SkipCondition_TwoBytes Jump to RunScript_SkipCondition_TwoBytes.
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