A51 MACRO ASSEMBLER  MULTI_SWITCH                                                         07/24/2006 08:19:33 PAGE     1


MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN Multi Switch.OBJ
ASSEMBLER INVOKED BY: E:\Keil\C51\BIN\A51.EXE Multi Switch.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1                     ORG             00H
0000 E590              2     START:  MOV             A,P1            ;讀取P1口數(shù)據(jù)
0002 C4                3                     SWAP    A                       ;交換A中高四位與低四位的位置
0003 44F0              4                     ORL             A,#0F0H         ;與0F0H相或
0005 F590              5                     MOV             P1,A            ;將開關(guān)狀態(tài)送LED顯示
0007 80F7              6                     SJMP    START
                       7                     END
A51 MACRO ASSEMBLER  MULTI_SWITCH                                                         07/24/2006 08:19:33 PAGE     2

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


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

P1 . . . . . . . .  D ADDR   0090H   A   
START. . . . . . .  C ADDR   0000H   A   


REGISTER BANK(S) USED: 0 

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