8255_2.lst

来自「protues 仿真 intel8255,很好的软件」· LST 代码 · 共 42 行

A51 MACRO ASSEMBLER  8255_2                                                               12/17/2006 23:25:00 PAGE     1


MACRO ASSEMBLER A51 V7.10
OBJECT MODULE PLACED IN 8255_2.OBJ
ASSEMBLER INVOKED BY: d:\Keil\C51\BIN\A51.EXE 8255_2.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     ;;89C51与8255A连接
                       2     ;;
0000                   3           ORG 0000H
0000 020030            4           LJMP MAIN
0030                   5           ORG 0030H
                       6     
0030 907FFF            7     MAIN: MOV DPTR,#7FFFH;;控制口地址
0033 7498              8           MOV A,#98H     ;;PA口方式0输入，PB口方式0输出
0035 F0                9           MOVX @DPTR,A
                      10     
0036 907FFC           11           MOV DPTR,#7FFCH;;PA口地址
0039 E0               12           MOVX A,@DPTR
                      13     
003A 907FFD           14           MOV DPTR,#7FFDH;;PB口地址
003D F0               15           MOVX @DPTR,A
                      16     
                      17           END
A51 MACRO ASSEMBLER  8255_2                                                               12/17/2006 23:25:00 PAGE     2

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


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

MAIN . . . . . . .  C ADDR   0030H   A   


REGISTER BANK(S) USED: 0 


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