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Pascal P3 compiler, VU Pascal compilers, Pascal-S

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

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Oberon for PICO RP2040 (and PICO 2 RP2350)

Oberon is still alive. Chris Burrows of Astrobe has maintained and added a lot to his Oberon compilers. New are support for ...

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Oberon Pi

Oberon Pi

Oberon, the jewel by Niklaus Wirth and Jürg Gutknecht: Operating System, Compiler and Computer. Oberon Pi is a port of Peter ...

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Sources of 1900 Pascal Compiler MK 2

Additions to the Jim Welsh pages, Queen’s University Belfast and Emerate Professor at The University of Queensland Brisbane, School of ...

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Apple Lisa Pascal compiler sources

I found an archive with the source of the early Lisa Pascal by Silicon Valley Software. The archive contains images of ...

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This site is about my experience with the Wirth school of languages, based on the ideas and implementations of Prof Niklaus Wirth, Kenneth Bowles, Per Brinch Hansen, colleagues, and their students. And my experience with the various variants, from the P2 and P4 compilers originating in Zürich ETH, via UCSD Pascal P-System to the Borland compilers and Modula and Oberon systems. All applicable to small computers and device control.

On this website you will find information on Pascal for small machines, like Wirth compilers, the UCSD Pascal system, many scanned books and other files on UCSD Pascal, Pascal on MSX and CP/M, Delphi programming on PC, Freepascal and Lazarus on Windows and Raspberry Pi, Oberon systems. Many sources of early Pascal compilers! And last but not least my Pascal-M system!

On this site you will information on (see the menu on the right!)
Standard Pascal and Validation
Niklaus Wirth
Edsger Dijkstra
Per Brinch Hansen
Ca.A.R Hoare
Jim Welsh
Pascal Px descendants like P5 and Pascal-M
UCSD Pascal
– Other Pascal articles like Freepascal on Raspberry Pi, Turbo Pascal and Delphi and electronics

Timeline of my exposure to the Wirth language and OS and systems family, 5 years as student, 10 years as software engineer, hobby, 40 years as the way of programming!

  • WIRTH (1)1970- Pascal compilers, the P2-P4 compilers, Pascal-S, Pascal-VU (the forerunnner of the Amsterdam Compiler Kit), Andrew Tanenbaum, Professor R.P  van de Riet.
  • 1979 – Pascal-M
  • 1980 – UCSD P-System, HP Pascal 1000
  • 1983 – RSX-11M VMS Pascal
  • 1985 Turbo Pascal, , 10 years VAX/VMS Pascal programmer, teacher of the Teleac support course Pascal, teacher and examinator Exin/Novi T5 Pascal
  • 1990 – Turbo Pascal 3 on CP/M and MS DOS to Delphi on Windows
  • 2010 – Freepascal + Lazarus on Windows and Linux