org 0000h
mov r1,30h
XRL A,R1
XRL A,#83h
XRL A,0ffh
XRL A,@R0
XRL 85h,A
XRL 87h,#80h

MOV A,#34H ;A=34H 
MOV R1,#12H ;R1=12H 
XRL A,R1 ;XRL 
end