并行io端口扩充键盘.lst

基于Proteus的51系列单片机设计与仿真

A51 MACRO ASSEMBLER  ____IO端口繽砡键臺                                                   05/15/2008 17:50:21 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN 并行IO端口扩充键盘.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 并行IO端口扩充键盘.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1            ORG    00H
  0000                 2     PORTA  EQU    0000H
  4000                 3     PORTB  EQU    4000H
  C000                 4     PORTC  EQU    0C000H
  7FFF                 5     CONTA  EQU    7FFFH
0000 0120              6            AJMP   START
0020                   7            ORG    20H
0020 7490              8     START: MOV    A,#90H
0022 90C000            9            MOV    DPTR,#PORTC
0025 F0               10            MOVX   @DPTR,A
0026 900000           11            MOV    DPTR,#PORTA
0029 E0               12            MOVX   A,@DPTR       
002A 904000           13            MOV    DPTR,#PORTB
002D F0               14            MOVX   @DPTR,A
002E 1133             15            CALL   DELAY
0030 020020           16            LJMP   START
0033 7F05             17     DELAY: MOV    R7,#05H
0035 7E28             18     DELA:  MOV    R6,#28H
0037 7D5A             19     DEL:   MOV    R5,#5AH
0039 DDFE             20            DJNZ   R5,$
003B DEFA             21            DJNZ   R6,DEL
003D DFF6             22            DJNZ   R7,DELA
003F 22               23            RET
                      24            END
                              
A51 MACRO ASSEMBLER  ____IO端口繽砡键臺                                                   05/15/2008 17:50:21 PAGE     2

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


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

CONTA. . . . . . .  N NUMB   7FFFH   A   
DEL. . . . . . . .  C ADDR   0037H   A   
DELA . . . . . . .  C ADDR   0035H   A   
DELAY. . . . . . .  C ADDR   0033H   A   
PORTA. . . . . . .  N NUMB   0000H   A   
PORTB. . . . . . .  N NUMB   4000H   A   
PORTC. . . . . . .  N NUMB   C000H   A   
START. . . . . . .  C ADDR   0020H   A   


REGISTER BANK(S) USED: 0 


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