A51 MACRO ASSEMBLER  4X4_KEYBOARD__2_                                                     07/27/2006 18:05:08 PAGE     1


MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN 4X4 KeyBoard (2).OBJ
ASSEMBLER INVOKED BY: e:\Program Files\Keil\C51\BIN\A51.EXE 4X4 KeyBoard (2).asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

  0030                 1     LINE    EQU             30H
  0031                 2     ROW             EQU             31H
  0032                 3     VAL             EQU             32H
0000                   4                     ORG             00H
0000 900097            5     START:  MOV             DPTR,#TABLE
0003 75A000            6                     MOV             P2,#00H
                       7     
0006 75B0F0            8     LSCAN:  MOV             P3,#0F0H
0009 30B00C            9     L1:             JNB             P3.0,L2
000C 12008E           10                     LCALL   DELAY
000F 30B006           11                     JNB             P3.0,L2
0012 753000           12                     MOV             LINE,#00H
0015 020042           13                     LJMP    RSCAN
0018 30B10C           14     L2:             JNB             P3.1,L3
001B 12008E           15                     LCALL   DELAY
001E 30B106           16                     JNB             P3.1,L3
0021 753001           17                     MOV             LINE,#01H
0024 020042           18                     LJMP    RSCAN
0027 30B20C           19     L3:             JNB             P3.2,L4
002A 12008E           20                     LCALL   DELAY
002D 30B206           21                     JNB             P3.2,L4
0030 753002           22                     MOV             LINE,#02H
0033 020042           23                     LJMP    RSCAN
0036 30B3D0           24     L4:             JNB             P3.3,L1
0039 12008E           25                     LCALL   DELAY
003C 30B3CA           26                     JNB             P3.3,L1
003F 753003           27                     MOV             LINE,#03H
                      28     
0042 75B00F           29     RSCAN:  MOV             P3,#0FH
0045 30B40C           30     C1:             JNB             P3.4,C2
0048 12008E           31                     LCALL   DELAY
004B 30B406           32                     JNB             P3.4,C2
004E 753100           33                     MOV             ROW,#00H
0051 02007E           34                     LJMP    CALCU
0054 30B50C           35     C2:             JNB             P3.5,C3
0057 12008E           36                     LCALL   DELAY
005A 30B506           37                     JNB             P3.5,C3
005D 753101           38                     MOV             ROW,#01H
0060 02007E           39                     LJMP    CALCU
0063 30B60C           40     C3:             JNB             P3.6,C4
0066 12008E           41                     LCALL   DELAY
0069 30B606           42                     JNB             P3.6,C4
006C 753102           43                     MOV             ROW,#02H
006F 02007E           44                     LJMP    CALCU
0072 30B7D0           45     C4:             JNB             P3.7,C1
0075 12008E           46                     LCALL   DELAY
0078 30B7CA           47                     JNB             P3.7,C1
007B 753103           48                     MOV             ROW,#03H                
                      49     
007E E530             50     CALCU:  MOV             A,LINE
0080 75F004           51                     MOV             B,#04H
0083 A4               52                     MUL             AB
0084 2531             53                     ADD             A,ROW
0086 F532             54                     MOV             VAL,A
                      55     
0088 93               56                     MOVC    A,@A+DPTR
0089 F5A0             57                     MOV             P2,A
                      58     
A51 MACRO ASSEMBLER  4X4_KEYBOARD__2_                                                     07/27/2006 18:05:08 PAGE     2

008B 020006           59                     LJMP    LSCAN
                      60     
008E 7E14             61     DELAY:  MOV             R6,#20
0090 7FFA             62     D1:             MOV             R7,#250
0092 DFFE             63                     DJNZ    R7,$
0094 DEFA             64                     DJNZ    R6,D1
0096 22               65                     RET
                      66     
0097 3F065B4F         67     TABLE:  DB              3FH,06H,5BH,4FH,66H,6DH,7DH,07H
009B 666D7D07                
009F 7F6F777C         68                     DB              7FH,6FH,77H,7CH,39H,5EH,79H,71H
00A3 395E7971                
                      69     
                      70     END
A51 MACRO ASSEMBLER  4X4_KEYBOARD__2_                                                     07/27/2006 18:05:08 PAGE     3

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


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

B. . . . . . . . .  D ADDR   00F0H   A   
C1 . . . . . . . .  C ADDR   0045H   A   
C2 . . . . . . . .  C ADDR   0054H   A   
C3 . . . . . . . .  C ADDR   0063H   A   
C4 . . . . . . . .  C ADDR   0072H   A   
CALCU. . . . . . .  C ADDR   007EH   A   
D1 . . . . . . . .  C ADDR   0090H   A   
DELAY. . . . . . .  C ADDR   008EH   A   
L1 . . . . . . . .  C ADDR   0009H   A   
L2 . . . . . . . .  C ADDR   0018H   A   
L3 . . . . . . . .  C ADDR   0027H   A   
L4 . . . . . . . .  C ADDR   0036H   A   
LINE . . . . . . .  N NUMB   0030H   A   
LSCAN. . . . . . .  C ADDR   0006H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   
P3 . . . . . . . .  D ADDR   00B0H   A   
ROW. . . . . . . .  N NUMB   0031H   A   
RSCAN. . . . . . .  C ADDR   0042H   A   
START. . . . . . .  C ADDR   0000H   A   
TABLE. . . . . . .  C ADDR   0097H   A   
VAL. . . . . . . .  N NUMB   0032H   A   


REGISTER BANK(S) USED: 0 

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