MOV SP,#256-32 

  MOV R1,#30H 
  MOV A,#01H 
  MOV R2,#00H
LOOP1:MOV @R1,A 
  ADD A,R2
  MOV R2,A
  INC A 
  INC R1 
  AJMP LOOP0 

LOOP0: CJNE R1,#34H,LOOP1 

  MOV @R1,A 
  MOV 25H,R2
  END