王爽汇编语言1至7章学习笔记代码.docxVIP

3-1 assume cs:code,ds:data,ss:stack stack segment dw 512 dup (0) stack ends code segment dw 512 dup (0) data segment data ends start: mov ax,data mov ds,ax mov ax,stack mov ss,ax mov ax,code mov bx,0 mov ax,ss:[bx] code ends end start 7-1 assume cs:code,ds:data data segment db welcome to masm! db ................ data ends code segment start: mov ax,data mov ds,ax mov cx,8 mov si,0 s: mov ax,0[si] mov 16[si],ax add si,2 loop s mov ax,4c00h int 21h code ends end start 7-6 assume cs:code,ds:data data segment db 1. file db 2. edit db 3. search db 4. view db 5. options db 6. help data ends code segment start: mov ax,data mov ds,ax mov bx,0 mov cx,6 s: mov al,[bx+4] and al mov [bx+4],al add bx,16 loop s mov ax,4c00h int 21h code ends end start 7-8 assume cs:code,ds:data data segment db 1. file db 2. edit db 3. search db 4. view db 5. options db 6. help data ends code segment start: mov ax,data mov ds,ax mov bx,0 mov cx,6 s0: mov dx,cx mov si,4 mov cx,7 s1: mov al,[bx+si] and al mov [bx+si],al inc si loop s1 mov cx,dx add bx,16 loop s0 mov ax,4c00h int 21h code ends end start 7-9 assume cs:code,ds:data data segment db 1. file db 2. edit db 3. search db 4. view db 5. options db 6. help dw 0 data ends code segment start: mov ax,data mov ds,ax mov bx,0 mov cx,6 s0: mov ds:[40h],cx mov si,4 mov cx,7 s1: mov al,[bx+si] and al mov [bx+si],al inc si loop s1 mov cx,ds:[40h] add bx,16 loop s0 mov ax,4c00h int 21h code ends end start 8-1 assume cs:code,ds:data, ss:stack data segment db test............ data ends stack segment dw 0,0,0,0,0,0,0,0,0 stack ends code segment start:mov ax,data mov ds,ax mov bx,0 mov bp,1h mov si,0