2.asm

较简单的8PCSLED流水灯

   org 0000h
   ljmp start
   org 30h
start: mov a,#02h
loop:  mov p1,a
       rl a
       lcall delay 
       ljmp loop
delay:
    mov r7,#0ffh
d1: mov r6,#0ffh
d2: djnz r6,d2
    djnz r7,d1
    ret
    end