cursor moving in pmode

[user4]

the codes I tent to move cursor doesn't works,what's wrong?
;bx=position/nasm
   mov al,0eh
   out 3d4h,al
   mov al,bh
   out 3d5h,al
   mov al,0fh
   out 3d4h,al
   mov al,bl
   out 3d5h,al
thanks

[user4]

I got it! by using 'out dx,ax' instead 'out 3d4h,al',all things OK.
but I got another question at the same time:how can I scroll the screen?

[user4]

blame me for the careless question:-)
I wrote a subroutine and now it works.

[df]

to scroll the screen you have to physically move the memory. do a block memory copy.

[user4]

yes, i got it. thanks.
btw,how can i get the position of current cursor?
i tried the port 3d4 & 3d5 but failed.