8255a.lst

89s52+8255a控制一组指示灯循环发光

A51 MACRO ASSEMBLER  8255A                                                                04/16/2009 22:30:06 PAGE     1


MACRO ASSEMBLER A51 V7.00a
OBJECT MODULE PLACED IN 8255A.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 8255A.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1     ORG 0000H
0000 907FFF            2     MOV DPTR,#7FFFH
0003 7489              3     MOV A,#89H
0005 F0                4     MOVX @DPTR,A
0006 7401              5     MOV A,#01H
0008                   6     MAIN:
0008 907CFF            7     MOV DPTR,#7CFFH
000B F0                8     MOVX @DPTR,A
000C 23                9     RL A
000D 1111             10     ACALL DEL
000F 0108             11     AJMP MAIN
0011                  12     DEL:
0011 7F04             13     MOV R7,#04H
0013                  14     DEL1:
0013 7EFF             15     MOV R6,#0FFH
0015                  16     DEL2:
0015 7DFF             17     MOV R5,#0FFH
0017 DDFE             18     DJNZ R5,$
0019 DEFA             19     DJNZ R6,DEL2
001B DFF6             20     DJNZ R7,DEL1
001D 22               21     RET
                      22     END
A51 MACRO ASSEMBLER  8255A                                                                04/16/2009 22:30:06 PAGE     2

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

DEL. . . . . . . .  C ADDR   0011H   A   
DEL1 . . . . . . .  C ADDR   0013H   A   
DEL2 . . . . . . .  C ADDR   0015H   A   
MAIN . . . . . . .  C ADDR   0008H   A   


REGISTER BANK(S) USED: 0 


ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)