Routines
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A924: Condition: Parser Succeeds
Calls the parser check indexed in JumpTable_ParserChecks and succeeds when it returns with the carry clear.
Stores A at ScriptParserResult.
Input
IX Pointer to the script entry (opcode, check index)
Output
F The zero flag is set when the check succeeds
The operand selects a parser check from JumpTable_ParserChecks.
Condition_ParserSucceeds A924 LD E,(IX+$01) Fetch the check number (the operand) from *IX+01 into E.
A927 PUSH IX Stash IX on the stack.
A929 LD IX,$A779 Point IX at the parser-check jump table at JumpTable_ParserChecks.
Resolve the check routine address from that table.
A92D CALL GetTableEntry Call GetTableEntry.
Jump to that check, returning here at ParserSucceeds_Return.
A930 LD DE,$A935 Push the return address ParserSucceeds_Return onto the stack.
A933 PUSH DE
A934 JP (HL) Jump to the check routine held in HL.
The check returns here with its result in A and the carry flag.
ParserSucceeds_Return A935 POP IX Restore the script pointer from the stack.
A937 LD ($A806),A Store the check's result at ScriptParserResult.
A93A JR C,ParserSucceeds_Failed Jump to ParserSucceeds_Failed if the check failed (carry set).
A93C XOR A Clear A and set the zero flag; the parser check passed.
A93D JP RunScript_SkipCondition_TwoBytes Jump to RunScript_SkipCondition_TwoBytes.
The check failed, so force the condition to fail.
ParserSucceeds_Failed A940 XOR A Clear A ready for RunScript_InvertConditionResult.
A941 CALL RunScript_InvertConditionResult Call RunScript_InvertConditionResult so the condition fails when the check failed.
A944 JP RunScript_SkipCondition_TwoBytes Jump to RunScript_SkipCondition_TwoBytes.
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