AA>        I'm getting OS/2 soon and I was wondering if the 
AA>assembly language changes other than BIOS?

Hi, Anis.
Instead of the PC-DOS method of setting registers and executing an interrupt, 
operating system services are requested by pushing the parameters and calling 
the operating system function you require, i.e., 

instead of:

  message  db "hello.$"

   mov dx, offset message
   mov ah,9
   int 21h

you use:
  message  db "hello.$"
  messagelength equ $-message
 
   push ds
   push offset message ;push
   push messagelength ;all
   push 0  ;parms
   call VioWrtTTY ;OS/2 write string function
   
___
 * MR/2 2.0 NR * billyoc{at}dpscon.uucp.netcom.com

--- Maximus/2 2.01wb