A51 MACRO ASSEMBLER  LED_0_99                                                             02/19/2005 16:38:40 PAGE     1


MACRO ASSEMBLER A51 V7.10
OBJECT MODULE PLACED IN LED_0-99.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE LED_0-99.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

  0020                 1     A_BIT EQU 20H                  ;個位數(shù)存放處
  0021                 2     B_BIT EQU 21H                  ;十位數(shù)存放處
  0022                 3     TEMP EQU 22H                   ;計數(shù)器寄存處
0000 752200            4     STAR: MOV TEMP,#0              ;初始化計數(shù)器
0003 1112              5     STLOP: ACALL DISPLAY           ;
0005 0522              6            INC TEMP
0007 E522              7            MOV A,TEMP
0009 B46403            8            CJNE A,#100,NEXT        ;等于100重來
000C 752200            9            MOV TEMP,#0
                      10     
000F 020003           11         NEXT: LJMP STLOP
                      12     
                      13     ;顯示子程序
0012 E522             14     DISPLAY: MOV A,TEMP
0014 75F00A           15              MOV B,#10
0017 84               16              DIV AB 
0018 F521             17              MOV B_BIT,A
001A 85F020           18              MOV A_BIT,B
001D 900048           19              MOV DPTR,#NUMTAB
0020 7804             20              MOV R0,#4
                      21     
0022 7905             22     DPL1:   MOV R1,#5
0024 E520             23     DPLOP:  MOV A,A_BIT
0026 93               24             MOVC A,@A+DPTR
0027 F580             25             MOV P0,A
0029 C2A7             26             CLR P2.7
002B 113F             27             ACALL D1MS
002D D2A7             28             SETB P2.7
002F E521             29             MOV A,B_BIT
0031 93               30             MOVC A,@A+DPTR
0032 F580             31             MOV P0,A
0034 C2A6             32             CLR P2.6
0036 113F             33             ACALL D1MS
0038 D2A6             34             SETB P2.6
003A D9E8             35             DJNZ R1,DPLOP
003C D8E4             36             DJNZ R0,DPL1
003E 22               37             RET
003F                  38     D1MS:
003F 7F32             39        MOV R7,#50
0041 7E14             40        D1: MOV R6,#20
0043 DEFE             41        D2: DJNZ R6,$
0045 DFFA             42            DJNZ R7,D1
0047 22               43            RET
                      44     
0048                  45     NUMTAB:
0048 C0F9A4B0         46     DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H   ;013456789字形碼
004C 999282F8                
0050 8090                    
                      47     
                      48     
                      49     END
A51 MACRO ASSEMBLER  LED_0_99                                                             02/19/2005 16:38:40 PAGE     2

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


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

A_BIT. . . . . . .  N NUMB   0020H   A   
B. . . . . . . . .  D ADDR   00F0H   A   
B_BIT. . . . . . .  N NUMB   0021H   A   
D1 . . . . . . . .  C ADDR   0041H   A   
D1MS . . . . . . .  C ADDR   003FH   A   
D2 . . . . . . . .  C ADDR   0043H   A   
DISPLAY. . . . . .  C ADDR   0012H   A   
DPL1 . . . . . . .  C ADDR   0022H   A   
DPLOP. . . . . . .  C ADDR   0024H   A   
NEXT . . . . . . .  C ADDR   000FH   A   
NUMTAB . . . . . .  C ADDR   0048H   A   
P0 . . . . . . . .  D ADDR   0080H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   
STAR . . . . . . .  C ADDR   0000H   A   
STLOP. . . . . . .  C ADDR   0003H   A   
TEMP . . . . . . .  N NUMB   0022H   A   


REGISTER BANK(S) USED: 0 

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