MOV $FF0000,%SP
MOV $0x0001,%R0l
MOV $0x0000,%R0h
MOV $0xBEEF,%R1l
MOV $0x0000,%R1h
CALL $SUBROUTINE
CALL $SUBROUTINE
CALL $SUBROUTINE
CALL $SUBROUTINE2
JMP $END
:SUBROUTINE
PUSH %R1
ADD %R0,%R1
POP %R1
RET
:SUBROUTINE2
ADD %R0,%R1
RET
:END
HALT