The Free On-line Dictionary of Computing (30 December 2018):

Ceres workstation Oberon System

    A complete Oberon compiler written in
   Oberon.  Source to most of the complete Ceres workstation
   Oberon System, including the National Semiconductor 32032
   code generator is available.  Less of the low level system
   specific code is available.

   (ftp://neptune.ethz.ch/Oberon/).

   (1994-12-14)