大大闷，帮下小弟啊，很简单的
怎么用键盘上的上下左右键控制光标的移动啊
read_c equ 0h
key_rom equ 16h
up equ 48h
down equ 50h
right equ 4dh
left equ 4bh
block equ 0dbh
esc equ 1bh
video segment at 0b800h
wd_buff label word
v_buff db 25*80*2dup(?)
video ends
pro_nam segment
main proc far
assume cs:pro_nam,es:video
start:push ds
sub ax, ax
push ax
mov ax video
mov es,ax
mov cx 80*25
mov bx,0
clear:
mov es:[wd_buff+bx],0700h
inc bx
inc bx
loop clear
mov ch,12d
mov cl,40d
get_char:
mov ah,read_c
int key_rom
cmp al,esc
jz exit
mov al,ah
mov al,up
jnz not_up
dec ch
not_up;
cmp al,down
jnz not_down
inc ch
not_down;
cmp al,right
jnz not_right
inc cl
not_left;
cmp al,left
jnz lite_it
dec cl
lite_it:
mov al,160d
mul ch
mov bl,cl
rol bl,1
mov bh,0
add bx,ax
mov al,block
mov es:[v_buff+bx],al
jmp get_char
exit:ret
main endp
pro_nam ends
end start
这是书上的，可是不能运行啊，99我啊
