关于王爽 汇编语言16章 实验16 的问题
本帖最后由 Mr_Liu淸淮 于 2012-3-18 15:46 编辑以下是我的int 7ch安装程序
assume cs:code
code segment
start:
mov ax,cs
mov ds,ax
mov si,offset setscreen
mov ax,0
mov es,ax
mov di,200h
mov cx,offset setscreenend-offset setscreen
cld
rep movsb
mov ax,0
mov es,ax
mov word ptr es:,200h
mov word ptr es:,0
mov ax,4c00h
int 21h
setscreen:
jmp short set
table dw sub1,sub2,sub3,sub4
set:
push bx
cmp ah,3
ja sret
mov bl,ah
mov bh,0
add bx,bx
call word ptr table
sret:
pop bx
iret
sub1:
push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov bx,0
mov cx,2000
sub1s:
mov byte ptr es:,' '
add bx,2
loop sub1s
pop es
pop cx
pop bx
ret
sub2:
push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov bx,1
mov cx,2000
sub2s:
and byte ptr es:,11111000b
or es:,al
add bx,2
loop sub2s
pop es
pop cx
pop bx
ret
sub3:
push bx
push cx
push es
mov cl,4
shl al,cl
mov bx,0b800h
mov es,bx
mov bx,1
mov cx,2000
sub3s:
and byte ptr es:,10001111b
or es:,al
add bx,2
loop sub3s
pop es
pop cx
pop bx
ret
sub4:
push cx
push si
push di
push es
push ds
mov si,0b800h
mov es,si
mov ds,si
mov si,160
mov di,0
cld
mov cx,24
sub4s:
push cx
mov cx,160
rep movsb
pop cx
loop sub4s
mov cx,80
mov si,0
sub4s1:
mov byte ptr ,' '
add si,2
loop sub4s1
pop ds
pop es
pop di
pop si
pop cx
ret
setscreenend:
nop
code ends
end start
以下为调用程序
assume cs:code
code segment
start:
mov ah,0
int 16h
mov ah,al
int 7ch
mov ax,4c00h
int 21h
code ends
end start
运行调用程序没有反映,debug显示程序有进入中断...
大神帮忙啊！！
小弟万分感谢啊！！
{:10_250:}{:10_279:}
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