片外清零.lst

来自「基于Proteus的51系列单片机设计与仿真」· LST 代码 · 共 36 行

A51 MACRO ASSEMBLER  芲外__零                                                             04/26/2008 20:19:22 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN 片外清零.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 片外清零.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0030                   1             ORG 0030H
0030 7800              2     CLEAR:  MOV  R0,   #00H       ;设数据指针DPTR=7000H
0032 907000            3             MOV  DPTR, #7000H
0035 E4                4     CLEAR1: CLR  A
0036 F0                5             MOVX @DPTR, A         ;清第一个数据单元
0037 A3                6             INC  DPTR             ;指针加1
0038 08                7             INC  R0               ;字节数加1
0039 B800F9            8             CJNE R0,   #00H,CLEAR1;字节数满256否？不满继续
003C 80F2              9             SJMP CLEAR            ;满结束程序
                      10             END
A51 MACRO ASSEMBLER  芲外__零                                                             04/26/2008 20:19:22 PAGE     2

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


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

CLEAR. . . . . . .  C ADDR   0030H   A   
CLEAR1 . . . . . .  C ADDR   0035H   A   


REGISTER BANK(S) USED: 0 


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