assume cs:code,ss:stack
stack segment
db 128 dup (0)
stack ends
code segment
start: mov ax,stack ;装入程序
mov ss,ax
mov sp,128
mov ax,code
mov ds,ax
mov si,offset setscreen
mov ax,0
mov es,ax
mov di,200h
mov cx,offset screedend-offset setscreen
cld
rep movsb
mov ax,0
mov es,ax
mov word ptr es:[7ch*4],200h
mov word ptr es:[7ch*4+2],0h
mov ax,4c00h
int 21h
setscreen: jmp short set1 ;设置直接定址表
table dw offset sub1-offset setscreen+offset setscreen, offset sub2-offset setscreen+offset setscreen, offset sub3-offset setscreen+offset setscreen, offset sub4-offset setscreen+offset setscreen ;取得位移
set1: push bx
cmp ah,3
ja set2
mov bl,ah
mov bh,0
add bx,bx
call word ptr table.202h[bx]
set2: pop bx
iret
sub1: push bx
push cx
push es
mov cx,0b800h
mov es,cx
mov bx,0
mov cx,2000
subs1: mov byte ptr es:[bx],' '
add bx,2
loop subs1
pop es
pop cx
pop bx
ret
sub2: push bx
push es
push cx
mov bx,0b800h
mov es,bx
mov bx,1
mov cx,2000
subs2: and byte ptr es:[bx],11111000b
or es:[bx],al
add bx,2
loop subs2
pop cx
pop es
pop bx
ret
sub3: push bx
push es
push cx
mov cl,4
shl al,cl
mov bx,0b800h
mov es,bx
mov bx,1
mov cx,2000
subs3: and byte ptr es:[bx],10001111b
or es:[bx],al
add bx,2
loop subs3
pop cx
pop es
pop bx
ret
sub4: push si
push es
push ds
push di
push cx
mov si,0b800h
mov es,si
mov ds,si
mov si,160
mov di,0
cld
mov cx,24
subs4: push cx
mov cx,160
rep movsb
pop cx
loop subs4
mov si,0
mov cx,80
subs41:mov byte ptr es:[160*24+si],' '
add si,2
loop subs41
pop cx
pop di
pop ds
pop es
pop si
ret
screedend: nop
mov ax,4c00h
int 21h
code ends
end start
- [游客] 俗话说:学而知不足。 楼主真是有心人啊。呵呵 12/10 20:23
- [musicvs] 哈,我个博主差不多...也是忘的差不多了,为了27号,我正在复习汇编~^_^ 12/10 20:06
- [jcw2008] 好像有地方不对吧,不知博主有没有写调用7ch号中断的程序检查过结果? 10/24 23:20
- [游客] Well done! 10/20 12:06
- [jcw2008] Good job! 10/19 20:18