Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

   ◄Summary►  ◄Notes►  ◄Back►
──────────────────────────────────────────────────────────────────────────────
 
  Description:  Device Open      [AT] [PS/2]
 
  Acquires ownership of a logical device for a process.
 
  Input                    Output
  ═════════════            ════════════════════════
  AH=80H                   If function successful
  BX=device ID             Carry flag=clear
  CX=process ID            AH=00H
                           If function unsuccessful
                           Carry flag=set
                           AH=status
                                    -♦-