;Program to add 8-bit numbers
CLR A
MOV R0, #40H ; Starting address
MOV R2, #05H ; Number of bytes to add
L2: ADD A, @R0
  INC R0
  JC L1
  SJMP L3
L1: INC 71H
L3: DJNZ R2, L2
  MOV 70H, A