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Found 1 result

  1. For some years I have been using a macro which checks if code or data crosses a page boundary. It worked very well, but sometimes too well. Then it failed in an early assembler pass, where it would have succeeded in the final one. Today Andrew came up with a brilliant idea: Define a label inside the macro in case of success only. And use that label later on. The assembler will return with an error if he cannot resolve the label in the final pass. For convenience I added the success check into my macro too. Here is the updated macro: _ERR SET 0 MAC CHECKPAGE ; {address} LIST OFF ; keep the list file clean IF (>(.-1)) != >{1} ECHO "" ECHO "ERROR: different pages! (", {1}, ",", .-1, ")" ECHO "" ; ERR ; previously this aborted the assembly _ERR SET _ERR + 1 ; count number of errors (useful for extra output) ELSE CHECKPAGE_{1} ; define in case of success ENDIF $CHECK SET CHECKPAGE_{1} ; check success LIST ON ENDM Usage: Table .byte 1, 2, 3, 4,... CHECKPAGE Table If Table crosses a page boundary the assembler will error: CHECKPAGE_Table ????(r )
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