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                             CWI Seminar Announcement

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                           8 1/2: The Plan 9 Window System

				   Rob Pike
		     AT&T Bell Laboratories, Murray Hill NJ, USA

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                                   ABSTRACT

  The Plan 9 window system, 8 1/2, is a modest-sized program of novel design.
  It provides ASCII I/O and bitmap graphic services to both local and remote
  client programs by offering a multiplexed file service to those clients.

  It serves traditional UNIX files like /dev/tty as well as more unusual
  ones that provide access to the mouse and the raw screen.
  Bitmap graphics operations are provided by serving a file called
  /dev/bitblt that interprets client messages to perform raster operations.

  The file service that 8 1/2 offers its clients is identical to that it uses
  for its own implementation, so it is fundamentally no more than a multiplexer.
  This architecture has some rewarding symmetries and can be implemented
  compactly; indeed 8 1/2 is considerably smaller than most of its clients.

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  Date: Monday, 5 October 1992
  Time; 14.00-15.30

  Location: CWI/Centrum voor Wiskunde en Informatica
            Kruislaan 413
            1098 SJ Amsterdam
          
            (Room M-279)

  For more information, contact: 
         Dick Bulterman (dcab@cwi.nl)
         020-592 41 47

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