Compare:JNB 01h,NO_MATCH    ;this bit is set when i've received the tag ID
        MOV R0,#40h
        MOV R6,#10h
        MOV DPTR,#Valid_ID
         

CMP_NXT:        CLR A
                MOVC A,@A+DPTR
                INC DPTR
                MOV 3Fh,@R0             ;i use 3Fh as an auxiliary register
                CJNE A,3Fh,NO_MATCH    ;if the content of A<>content of 3Fh then no match
               
                INC R0
                DJNZ R6,CMP_NXT
                CLR P2.0                            ;if the tag ID =Valid_ID then a LED will glow
                   
NO_MATCH: RET