; test1  flash       (flash1.asm)
#include 8051.H
         .org 0000H

main     mov   a,#00
next     mov   P1,a
         mov   r2,#255
loop1    mov   r3,#20
loop2    djnz  r3,loop2
         djnz  r2,loop1
         inc   a
         sjmp  next
         .end