Skip to content

Instantly share code, notes, and snippets.

@dan-silver

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

Created April 4, 2014 06:16
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save dan-silver/9969118 to your computer and use it in GitHub Desktop.
Save dan-silver/9969118 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
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
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment