ad1.asm

我学单片机89C51时编的大部分程序都在里面

      org  0000h          ;ADC0809的片选CS为7fffH,RAM6116的片选为b000H
      ajmp main
      org  0013h
      ajmp start
      org  0030h
main: mov  dptr,#7fffh
      mov  r2,#0ffh
      mov  r0,#00h
      mov  p2,#0b0h
      mov  a,#07h
      movx @dptr,a
      setb it1
      setb ea
      setb ex1
      sjmp $
start:movx a,@dptr
      movx @r0,a
      inc r0
      djnz r2,done
      mov r2,#0ffh
done: mov a,#07h
      movx @dptr,a
      reti