8086彙編碰撞的小球

 

 

 

有意思的碰撞小球

assume cs:code

code segment
start:
	mov ax,0b800h
	mov es,ax
	mov dx,0h
	mov bx,0101h
	
	mov cx,50000
s:	push cx
	
	mov cx, dx
	mov ax,00a0h
	mul ch

	mov ch,0
	add cl,cl
	add ax,cx
	mov di,ax

	cmp byte ptr es:[di],01h
	jne put_ok
	add byte ptr es:[di+1],1 
	and byte ptr es:[di+1],0fh
        jmp end_ok
put_ok:
	mov word ptr es:[di],0a01h
end_ok:	

	cmp dh,0
	jne x1
	mov bh,1	
x1:
	cmp dl,0
	jne x2
	mov bl,1
x2:	
	cmp dh,24
	jne x3
	mov bh,-1		
x3:	
	cmp dl,79
	jne x4
	mov bl,-1
x4:
	add dh,bh
	add dl,bl

	mov cx,0ff0h
	h1:push cx
	mov cx,05f0h
	h2:loop h2
	pop cx
	loop h1	

	pop cx
	loop s 
	mov ax,4c00h
	int 21h
code ends
end start