A51 MACRO ASSEMBLER  羅薩燈                                                               05/02/2008 08:52:12 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN 流水燈.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 流水燈.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0030                   1          ORG   0030H     ;從RAM內存地址30開始執行程序          
0030 7580FF            2          MAIN:MOV   P0,#0FFH  ;初始化P0、P1、P2口為高電平                 
0033 7590FF            3               MOV   P1,#0FFH
0036 75A0FF            4               MOV   P2,#0FFH
0039 74FE              5               MOV   A, #0FEH  ;[FE]的二進制碼為11111110 置為0的引腳就會亮燈
003B F580              6        MAIN2: MOV   P0, A
003D 1142              7               ACALL   DELAY   ;調用延時子程序
003F 23                8               RL     A        ;累加器內容左移一位
0040 013B              9               AJMP     MAIN2  ;跳轉到主程序入口MAIN2
0042 7F0A             10         DELAY:MOV  R7,#10     ;延時1s
0044 7EC8             11         DE1:  MOV  R6,#200
0046 7DF8             12         DE2:  MOV  R5,#248
0048 DDFE             13               DJNZ R5,$
004A DEFA             14               DJNZ R6,DE2
004C DFF6             15               DJNZ R7,DE1
004E 22               16               RET
                      17               END
A51 MACRO ASSEMBLER  羅薩燈                                                               05/02/2008 08:52:12 PAGE     2

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


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

DE1. . . . . . . .  C ADDR   0044H   A   
DE2. . . . . . . .  C ADDR   0046H   A   
DELAY. . . . . . .  C ADDR   0042H   A   
MAIN . . . . . . .  C ADDR   0030H   A   
MAIN2. . . . . . .  C ADDR   003BH   A   
P0 . . . . . . . .  D ADDR   0080H   A   
P1 . . . . . . . .  D ADDR   0090H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   


REGISTER BANK(S) USED: 0 

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