一、代码段(codesegment/textsegment): 又称文本段,用来存放指令,运行代码的一块内存空间 此空间大小在代码运行前就已经确定 内存空间一般属于只读,某些架构的代码也允许可写 在代码段中,也有可能包含一些只读的常数变量,例如字符串常量等。 二、数据段(datasegment): 可读可写 存储初始化的全局变量和初始化的static...
Data segment ;定义三个变量:X1 =12h, X2 = 34h, X3= 56hData endsCode segment Assume cs:code,ds:dataStart: ;将DATA段初值装载到DS段寄存器中 Mov ax,1111h Mov bx,2222h Mov dx,3333h Mov cx,0CCCCh ; 1、将寄存器AX、BX和DX内容相加,和放在寄存器DX中,AX、BX中值不变。 ;2、将X1的值 ...
CODE SEGMENTASSUME CS: CODE, DS: DATASTART: MOV AX, DATAMOV DS, AXMOV BX, OFFSET BUFMOV CL, 7LOP1: MOV DL, [BX]MOV AH, 2INT 21HINC BXDEC CLJNZ LOP1MOV DX, OFFSET BUFMOV AH, 9INT 21HMOV AH, 4CHINT 21HCODE ENDSEND START...
DATA SEGMENTDATA1 DB ‘12345678’DATA2 DB 6 DUP(?)DATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATASTART:MOV AX,DATAMOV DS,AXMOV BX,OFFSET DATA1MOV DI,OFFSET DATA2MOV CX,8NEXT: MOV AL,[BX]AND AL,0FHMOV [DI],ALINC BXINC DILOOP NEXTMOV AH,4CHINT 21HCODE ENDSEND START写出程序运行结果...
表示8个0 a db 0dh,0ah,'$';a相当于变量名。这句的意思是回车换行 k db 'input the number:',0dh,0ah,'$' ;这句声明一个字符串有回车换行.$表示结束。相当于C语言中的NULL d db 'the result is:',0dh,0ah,'$' ;同上 data ends ;数据段结束 code segment; 代码段开始 ...
2. 代码段结尾 一个汇编hello world程序 - 编程入门网 ... ENTER ENDP; 子程序结尾CODE ENDS;代码段结尾END START; 结束汇编 ... bianceng.cn|基于31个网页 3. 代码段到此结束 宏定义与宏指令的使用示例 ... ENDM; 宏定义结束CODE ENDS;代码段到此结束DATA SEGMENT; 这是数据段 ... ...
()//End the shared data segment and default back to//the normal data segment behavior.//This is the most important statement of all//Ideally you can set this in the projects linker tab, but I never could get//that to work. I stumbled across this in a discussion board response from//...
现有程序如下: DATA SEGMENT A DB 23 B DB 0F0H C DB 0 DATA ENDS CODE SEGMENT ASSUME CS:CODE, DS: DATA START: MOV AX, DATA MOV DS, AX MOV AL, A CMP AL, B JZ L JG M MOV C, -1 JMP EXIT L: MOV C, 0 JMP EXIT M: MOV C, 1 EXIT: MOV AH, 4CH INT 21H CODE ENDS END...
DATA SEGMENTRESULT DB 4 DUP(?)NUM DW 3487HDATA ENDSCODE SEGMENTASSUME CS:CODE,DS:DATAMOV DX,DATAMOV DS,DXMOV AX,NUMMOV CL,4MOV BL,4MOV SI,OFFSET RESULTLP: CALL HASCMOV [SI],DLINC SISHR AX,CLDEC BLJNZ LPEXIT:MOV AH,4CHINT 21HHASC PROC NEARMOV DL,ALAND DL,0FHCMP DL,9JA ...
Figure 2. Storing and accessing data in columns. Code segment 2 executes in 33% less time than segment 1 on machine A, and in 55% less time than segment 1 on machine B. Why Code Segment 2 is FasterModern CPUs use a fast cache to reduce the average time taken to acc...