实验3 多个段的汇编源程序编写与调试

Posted 2020-12-21 baijimtc

1. 实验任务1

assume cs:code, ds:data
 data segment
 db ‘Nuist‘
 db 5 dup(2)
 data ends
 code segment
 start:
 mov ax, data
 mov ds, ax
 mov ax, 0b800H
 mov es, ax
 mov cx, 5
 mov si, 0
 mov di, 0f00h
 s:
 mov al, [si] 
 and al, 0dfh 
 mov es:[di], al 
 mov al, [5+si] 
 mov es:[di+1]
 inc si      
 add di, 2   ;di+2
 loop s
 ?
 mov ah, 4ch
 int 21h
 code ends
 end start