ex7-2.lst

《单片机原理实用教程——基于Proteus虚拟仿真》一书的配套光盘


ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 1





       MCS-51 Family Cross Assembler   A S E M - 5 1   V 1.2
       =====================================================



	Source File:	EX7-2.ASM
	Object File:	EX7-2.HEX
	List File:	EX7-2.LST



 Line  I  Addr  Code            Source

    1:		N      0000			ORG	0000H
    2:		N      7CFF	PORTA	EQU		7CFFH 			;A口
    3:		N      7DFF	PORTB	EQU		7DFFH 			;B口
    4:		N      7EFF	PORTC	EQU		7EFFH 			;C口
    5:		N      7FFF	CADDR	EQU		7FFFH 			;控制字地址
    6:	  0000	80 2E				SJMP	START
    7:		N      0030			ORG	0030H
    8:	  0030	74 82		START:	MOV	A,#82H   		;方式0,PA,PC输出，PB输入
    9:	  0032	90 7F FF		MOV	DPTR,#CADDR
   10:	  0035	F0			MOVX    @ DPTR,A
   11:	  0036	90 7D FF	loop:	MOV     DPTR,#PORTB
   12:	  0039	E0			MOVX    A,@ DPTR      		;读入B口
   13:	  003A	90 7C FF		MOV     DPTR,#PORTA
   14:	  003D	F0			MOVX    @DPTR,A   		;输出到A口
   15:	  003E	12 00 44	        LCALL	DELAY
   16:	  0041	02 00 36		LJMP	loop
   17:
   18:	  0044	7E 00		DELAY:	MOV	R6,#0
   19:	  0046	7F 00		DELAY1: MOV	R7,#0
   20:	  0048	DF FE		DELAY2:	DJNZ	R7,DELAY2
   21:	  004A	DE FA			DJNZ	R6,DELAY1
   22:	  004C	22			RET
   23:					END





                     register banks used:  ---

                     no errors




ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 2





	       L I S T   O F   S Y M B O L S
	       =============================


SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
AC				  BIT	      D6
ACC				  DATA	      E0
B				  DATA	      F0
CADDR				  NUMBER    7FFF	   5
CY				  BIT	      D7
DELAY				  CODE	    0044	  18
DELAY1				  CODE	    0046	  19
DELAY2				  CODE	    0048	  20
DPH				  DATA	      83
DPL				  DATA	      82
EA				  BIT	      AF
ES				  BIT	      AC
ET0				  BIT	      A9
ET1				  BIT	      AB
EX0				  BIT	      A8
EX1				  BIT	      AA
EXTI0				  CODE	    0003
EXTI1				  CODE	    0013
F0				  BIT	      D5
IE				  DATA	      A8
IE0				  BIT	      89
IE1				  BIT	      8B
INT0				  BIT	      B2
INT1				  BIT	      B3
IP				  DATA	      B8
IT0				  BIT	      88
IT1				  BIT	      8A
LOOP				  CODE	    0036	  11
OV				  BIT	      D2
P				  BIT	      D0
P0				  DATA	      80
P1				  DATA	      90
P2				  DATA	      A0
P3				  DATA	      B0
PCON				  DATA	      87
PORTA				  NUMBER    7CFF	   2
PORTB				  NUMBER    7DFF	   3
PORTC				  NUMBER    7EFF	   4
PS				  BIT	      BC
PSW				  DATA	      D0
PT0				  BIT	      B9
PT1				  BIT	      BB
PX0				  BIT	      B8
PX1				  BIT	      BA
RB8				  BIT	      9A
RD				  BIT	      B7
REN				  BIT	      9C
RESET				  CODE	    0000
RI				  BIT	      98
RS0				  BIT	      D3

ASEM-51 V1.2                                         Copyright (c) 1996 by W.W. Heinz                                         PAGE 3



SYMBOL				  TYPE     VALUE	LINE
------------------------------------------------------------
RS1				  BIT	      D4
RXD				  BIT	      B0
SBUF				  DATA	      99
SCON				  DATA	      98
SINT				  CODE	    0023
SM0				  BIT	      9F
SM1				  BIT	      9E
SM2				  BIT	      9D
SP				  DATA	      81
START				  CODE	    0030	   8
T0				  BIT	      B4
T1				  BIT	      B5
TB8				  BIT	      9B
TCON				  DATA	      88
TF0				  BIT	      8D
TF1				  BIT	      8F
TH0				  DATA	      8C
TH1				  DATA	      8D
TI				  BIT	      99
TIMER0				  CODE	    000B
TIMER1				  CODE	    001B
TL0				  DATA	      8A
TL1				  DATA	      8B
TMOD				  DATA	      89
TR0				  BIT	      8C
TR1				  BIT	      8E
TXD				  BIT	      B1
WR				  BIT	      B6