串行通信发送.lst

这个是大学的计算机接口实验课上经常用到的原程序

A51 MACRO ASSEMBLER  串行通信发送                                                         04/14/2005 16:13:49 PAGE     1


MACRO ASSEMBLER A51 V1.10
OBJECT MODULE PLACED IN 串行通信发送.OBJ
ASSEMBLER INVOKED BY: H:\239\A51.EXE 串行通信发送.ASM DB

LOC  OBJ            LINE     SOURCE

                       1         ;串行通信发送程序清单;
0100                   2             ORG       0100H    ;不可以直接写0100H?
0100 758920            3             MOV    TMOD,#20H
0103 758DF3            4             MOV    TH1, #0F3H
0106 758BF3            5             MOV    TL1, #0F3H
0109 7598D0            6             MOV    SCON,#0D0H
010C 758780            7             MOV    PCON,#80H
010F 7830              8             MOV    R0,  #30H
0111 7940              9             MOV    R1,  #40H
0113 7A0A             10             MOV    R2,  #0AH
0115 D28E             11             SETB   TR1
0117 E6               12     S1:     MOV    A,   @R0
0118 F599             13             MOV    SBUF, A
011A 109902           14     S2:     JBC    TI,  S3
011D 211A             15             AJMP   S2
011F C299             16     S3:     CLR    TI
0121 109802           17     S4:     JBC    RI,  S5
0124 2121             18             AJMP   S4
0126 E599             19     S5:     MOV    A,   SBUF
0128 C298             20             CLR    RI
012A F7               21             MOV    @R1, A
012B 08               22             INC    R0
012C 09               23             INC    R1
012D DAE8             24             DJNZ   R2,  S1
012F 80FE             25             SJMP   $
                      26             END
A51 MACRO ASSEMBLER  串行通信发送                                                         04/14/2005 16:13:49 PAGE     2

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


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

PCON . . . . . . .  D ADDR   0087H   A   
RI . . . . . . . .  B ADDR   0098H.0 A   
S1 . . . . . . . .  C ADDR   0117H   A   
S2 . . . . . . . .  C ADDR   011AH   A   
S3 . . . . . . . .  C ADDR   011FH   A   
S4 . . . . . . . .  C ADDR   0121H   A   
S5 . . . . . . . .  C ADDR   0126H   A   
SBUF . . . . . . .  D ADDR   0099H   A   
SCON . . . . . . .  D ADDR   0098H   A   
TH1. . . . . . . .  D ADDR   008DH   A   
TI . . . . . . . .  B ADDR   0098H.1 A   
TL1. . . . . . . .  D ADDR   008BH   A   
TMOD . . . . . . .  D ADDR   0089H   A   
TR1. . . . . . . .  B ADDR   0088H.6 A   


REGISTER BANK(S) USED: 0 


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