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