Thanks to a tip by Stefano B., who found tape dumps of university archives I have added:

Compilers developed at the Vrije Universiteit, Amsterdam

– Pascal-U, the 1977 derivate of the portable Pascal P2 from ETH
– Pascal-VU, the ISO standard Pascal compiler from 1979
– (links to) the Amsterdam Compiler Kit

I also added some personal information about my time at the University Computer Science Department, 1977-1980 for my MSc.

Stefano also traced the Pascal P3 compiler, 1976, the missing link between Pascal P2 and Pascal P4

Some special versions of Pascal-S added

Oberon is still alive.

Chris Burrows of Astrobe has maintained and added a lot to his Oberon compilers.

New are support for the Raspberry Pi PICO and PICO2

See also the Oberon RTK site, a real time kernel written in Oberon for the PICO.

Oberon, the jewel by Niklaus Wirth and Jürg Gutknecht: Operating System, Compiler and Computer.

Oberon Pi is a port of Peter de Wachter’s Project Oberon emulator to the Raspberry Pi OS by Richard Gleaves.
Richard Gleaves is a former UCSD Pascal Project member, and author of the 1984 Springer book “Modula-2 for Pascal Programmers”.

The software changes were mostly limited to the UI, with the goal of flattening out the learning curve for new users of the Oberon system, not only read about in a few places online, but also experienced firsthand after bringing the system up.

Richard also added Andreas Pirklbauer’s changes to the Oberon compiler, to fully implement CASE statements and fix a few compiler bugs.

The main feature in Oberon Pi is its documentation, which includes new user guides Richard wrote for the Oberon operating system and draw application, along with a complete set of Wirth’s original PDF documents on the Oberon language, now made more usable with the addition of TOCs to the PDFs.

See the page on Oberon Pi here.

Additions to the Jim Welsh pages, Queen’s University Belfast and Emerate Professor at The University of Queensland Brisbane, School of Information Technology and Electrical Engineering – 1900 Pascal User’s Guide,- Sources of 1900 Pascal Compiler MK 2.

As explained in the next Summary, the CDC compiler was ported in a number of steps to the 1900 computer.

Not all sources of the Pascal compilers survived time. <Here are the sources of the 2A version, a further developed ETH type compiler. Still recursive descent down like the ETH ones. Compiler source, post-mortem dumppsource, and ICL 1900 runtime assembler source

This compiler differs of course in the code generation to ICL 1900 machine code.

    (****************************************************
      *                                                  *
      *     1900  PASCAL COMPILER   MK  2                *
      *     -----------------------------                *
      *                                                  *
      *     AUTHORS :  J WELSH                           *
      *                C QUINN                           *
      *                K MCSHANE                         *
      *                                                  *
      *                DEPARTMENT OF COMPUTER SCIENCE    *
      *                QUEEN'S UNIVERSITY                *
      *                BELFAST                           *
      *                                                  *
      *     FROM THE ETH ZURICH COMPILER                 *
      *     FOR  CDC 6000  BY U AMMANN                   *
      *                                                  *
      *     POSTMORTEM DIAGNOSTICS AND OPTION HANDLING   *
      *         BY D.A.WATT AND W.FINDLAY                *
      *         DEPARTMENT OF COMPUTING SCIENCE          *
      *         THE UNIVERSITY OF GLASGOW                *
      *         SCOTLAND                                 *
      *                                                  *
      ****************************************************)