?? 并行io端口擴充鍵盤.lst
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A51 MACRO ASSEMBLER ____IO端口繽砡鍵臺 05/15/2008 17:50:21 PAGE 1
MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN 并行IO端口擴充鍵盤.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 并行IO端口擴充鍵盤.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端口繽砡鍵臺 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)
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