实验13.1作业练习
源代码:assume cs:code
data segment
db "welcome to masm!",0
data ends
code segment
start:
mov dh,10
mov dl,10
mov cl,2
mov ax,data
mov ds,ax
mov si,0
int 7ch
mov ax,4c00h
int 21h
code ends
end start
编写安装代码:
assume cs:code
code segment
start:
mov ax,cs
mov ds,ax
mov si,offset do0
mov ax,0
mov es,ax
mov di,200h
mov cx,offset do0end-offset do0
cld
rep movsb
mov ax,0
mov es,ax
mov word ptr es:,200h
mov word ptr es:,0
mov ax,4c00h
int 21h
;以上为一个安全区域
;以下为一个终端列表程序
do0:
mov al,160
mov di,ax
mov dh,0
add di,ax
mov ax,0b800h
mov es,ax
mov ah,cl
s: cmp byte ptr ,0 ;判断es:的值是否为0。
je ok ;如果是,跳转到ok,如果不是,向下执行。
mov al,
mov es:,ax
inc si
add di,2
jmp s
ok: iret
do0end:nop
code ends
end start
测试成功,若程序有所错误,请大神指点,或者有不同想法的朋友,一起讨论。 请问源文件和安装代码是分别运行吗
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