assume cs:code
code segment
start:
mov ax,0
mov es,ax
mov ax,cs
mov ds,ax
mov di,200h
mov si,offset int7c
mov cx,offset int7cend-offset int7c
cld
rep movsb
mov word ptr es:[1F0H],200H
mov word ptr es:[1F2H],0H
mov ax,4c00h
int 21h
int7c:jmp short go
table:dw sub1,sub2,sub3,sub4
go:push bx
cmp ah,3
ja sret
mov bl,ah
mov bh,0
add bx,bx
add word ptr cs:202H[bx],1D8H
call word ptr cs:202H[bx]
sret:pop bx
iret
mov ax,4c00h
int 21h
sub1:push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov cx,2000
mov bx,0
sub1s:mov byte ptr es:[bx],' '
add bx,2
loop sub1s
pop es
pop cx
pop bx
ret
sub2:push ax
push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov bx,1
mov cx,2000
sub2s:and byte ptr es:[bx],11110000b
or es:[bx],al
add bx,2
loop sub2s
pop es
pop cx
pop bx
pop ax
ret
sub3:push ax
push bx
push cx
push es
mov bx,0b800h
mov es,bx
mov cl,4
shl al,cl
mov cx,2000
mov bx,1
sub3s:and byte ptr es:[bx],00001111b
or es:[bx],al
add bx,2
loop sub3s
pop es
pop cx
pop bx
pop ax
ret
sub4:push cx
push si
push di
push ds
push es
mov si,0b800h
mov es,si
mov ds,si
mov si,160
mov di,0
mov cx,24
cld
sub4s:push cx
mov cx,160
rep movsb
pop cx
loop sub4s
mov cx,80
mov si,0
sub4s2:mov byte ptr es:[si],' '
add si,2
loop sub4s2
pop es
pop ds
pop di
pop si
pop cx
ret
int7cend:nop
code ends
end start
用debug a命令
测试测试清屏通过
- [younggay] 20? 那个20? 01/21 15:05
- [martian] 博主辛苦了! 11/24 13:43
- [acool] 先存下 看看O(∩_∩)O哈哈~ 11/22 12:30
- [acool] 不错,踩踩;) 11/22 12:27
- [tomato] 收藏一下,好好看看,扫扫盲。 11/21 20:01
- [younggay] 程序正确固然重要,必要的地方写注释也是很必要的。要不看的人脑袋可就大了。呵呵 fighting ! 11/21 14:47
- [younggay] 就提一点要求: 哥儿们,加点注释把,(*^__^*)...嘻嘻 11/21 14:37
- [lwbfq] 有点糊涂。 11/21 14:26
- [lwbfq] 有点糊涂。 11/21 14:26
- [younggay] 嗯。不错,不过要是关键代码部分加上注释就更好了。而且加注释也是一个成熟的编程人员的良好习惯。 11/21 14:23
- [h.goood] 汇编作业在哪里做?我怎么没找到? 11/24 12:32