Program to shift a block of 8 bytes data,from 50h to 57h,1 byte up data is available from 51H to 58H

START: MOV R0,#57H
 MOV R1,#58H
 MOV R7,#08H
 SHIFT: MOV A,@R0
 MOV @R1,A
 DEC R0
 DEC R1
 DJNZ R7,SHIFT
 OVER :SJMP OVER