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jmp main
sum:
mov x, %1000 ; %1000 = x
add y, %1000 ; %1000 += y
rts
sub:
mov x, %1000 ; %1000 = x
sub y, %1000 ; %1000 -= y
rts
operation = 0 ; 0 for sum, >0 for sub
x = 48
y = 7
main:
beq operation, call_sum ; if operation then %1000 = x+y
jmp call_sub ; else %1000 = x-y
call_sum:
jsr sum
jmp call_end
call_sub:
jsr sub
call_end:
inc %1001 ; Times main has been ran
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