assume cs:code, ds:data, ss:stack data segment string db 'try' len = $ - string data ends stack segment dw 2 dup(?) stack ends code segment start: mov ax, data mov ds, ax mov ax, stack mov ss, ax mov sp, 2 mov cx, len ; cs: 字符串长度 mov ax, 0 mov si, ax ; si:...
mov ax,stack ;将stack的段地址传递给寄存器ss mov ss, axmov ax, data ;将data数据段的地址传递给寄存器ds mov ds, ax 通过以上代码的功能可知到ss寄存器和ds寄存器的是分别是stack段和data段的段地址(程序执行到最后寄存器都未发生改变,数据段的内容少于16字节), 由stack段、data段、代码段的段地址之间的关...
在编程时,我们需要使用assume将有特定用途的段和相关的段寄存器关联起来。 例如上述程序中定义了一个名为codesg的代码段,我们需要将CS段寄存器和该段进行关联,格式则为: assume cs:codesg 如果你要关联多个段:可以使用如下格式 assume cs:codesg ds:datasg ss:stacksg 除了伪指令以外,还有最重要的汇编指令。 编程...
STRING1 DB ’The student number of grade is bigger than 90’ STRING2 DB ‘The student number of grade is between 60 and 90’ STRING3 DB ’The student number of grade is less than 90’ DATASEG ENDS SS1 SEGEMENT STACK DW 30 DUP(?) SS1 ENDS CODE SEGMENT ASSUME CS: CODE, DS:DATA...
DATA SEGMENT BUF DB 08H,12H,34H,56H,78H,9AH,0BCH,0DEH,0F0H,0FFH KEY DB 78H DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA,ES:DATA START:MOV AX,DATA MOV DS,AX MOV ES,AX CLD LEA DI,BUF MOV CL,[DI] XOR CH,CH INC DI MOV AL,KEY REPNE SCASB JNE DONE DEC BUF M...
ASSUME CS:CODE,DS:DATA,SS:STACKSTART:MOV AX,DATAMOV DS,AXMOV AX,STACKMOV SS,AXLEA SI,BUF1LEA DI,BUF2LEA BX,MYDATAMOV CX,5AGAIN:XOR AX,AX MOV AL,[BX]INC BXMOV DL,[BX]INC BXIMUL DLPUSH AX MOV AL,[BX]INC BXCBWMOV DL,[BX]INC BXIDIV DL CBWPUSH AXMOV AL,[BX]INC BXCBW...
DATA ENDS STACK SEGMENT STACK DB 200 DUP(0) STACK ENDS CODE SEGMENT ASSUME CS:CODE,SS:STACK,DS:DATA BEGIN: MOV AX,DATA MOV DS,AX MOV BX,0 MOV SI,0 LOP: MOV AX,BUF[BX] MOV DX,AX AND DL,0FH MOV CX,3 LP:SHR DL,1;向右移位三次,判断最低三位是否是1 JNC NEXT LOOP LP MOV ...
MY_DATA SEGMENT;数据段 NUM DB 0,0,2,3,4,5,6,1,-2,-3,-4,-5,-6,-7,-8,-9 RES DB 3 DUP(0)MY_DATA ENDSMY_CODE SEGMENT;代码段ASSUME CS:MY_CODE, DS:MY_DATASTART:MOV AX , MY_DATA MOV ( ) ,AX MOV CX, 16 LEA SI , NUM LEA DI , RES AGAIN:MOV AL, [SI] CMP AL,...
ASSUME CS:CODE,DS:DATA,SS:STACSTART PROC FARPUSH DSXOR AX,AXPUSH AXMOV AX,DATAMOV DS,AXLEA DX,SOURCE ;数据区起始地址LEA SI,NAME0 ;原始数据文件名MOV CX,N ;字节数CALL LOAD ;从’INPUT1.DAT’中读取数据LEA SI,SOURCELEA DI,RESULT; ***BEGIN***; ***END***LEA DX,RESULT ;结果数据...