Pseudo TTY Drivers -- Need Help!!!!

[Pavan Nigam]

      Can any of you wizards help me out with getting pseudo-ttys
      on System III.  I am porting my program (a window manager)
      from berkeley 4.2 to System III, and I am looking for a
      pty driver since System III doesn't have any.  Can you give
      me pointers on porting the 4.2 driver to system III.

                                            Thanks.

                                         Pavan Nigam

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