main: lodi $0 1 ;load 1 into r0 pshi $0 ;push onto stack lodi $0 1 ;1 pshi $0 call &add ; call memory location for tag "add" popi $0 ;get value from function call "add" itos $1 $0 ;convert int to string puts $1 ;print string to stdout halt add: popi $0 ; int a popi $1 ; int b addi $2 $1 $0 ; a + b pshi $2 retn ; actually do the return