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dan-silver/Subroutine to add numbers through call by reference.asm

Created April 4, 2014 06:16
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Subroutine to add numbers through call by reference.asm
ORG $B000
DATA1 FCB 5
DATA2 FCB 6
RESULT RMB 1
ORG $C000
LDS #$A000
LDX #DATA1
PSHX
LDX #DATA2
PSHX
JSR SUB
STAA RESULT
END BRA END
ORG $D000
SUB PULY
PULX
LDAA 0,X
PULX
LDAB 0,X
PSHY
ABA
RTS
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