[Oberon] Oberon V4 on the Raspberry Pi?

Liam Proven lproven at gmail.com
Mon Jan 11 23:33:31 CET 2021

On Mon, 11 Jan 2021 at 21:09, Chris Burrows <chris at cfbsoftware.com> wrote:
> This is potentially confusing now that 'emulators' for Project Oberon
> They are different beasts altogether. Further to Paul's comments, at the
> risk of being picky I would rephrase what you said as:
> "Native Oberon is one platform of what was originally called Oberon
System 3
> (S3 - it was never called V3) and was later renamed to ETH-Oberon. There
> others hosted on Windows, MacOS and Linux and revived by Peter Matthias as
> the Oberon Linux Revival (OLR) ...
> Oberon V4, aka Linz Oberon only runs on bare hardware on the ETH Ceres
> computer (which uses the National Semiconductor NS32xxx CPU) but is also
> hosted on MS-Windows, Solaris (68K and Sparc), HP-UX, Irix, Amiga, OS2
> My main point is that none of these systems are 'emulated'. In every case
> instructions generated by the Oberon compiler are natively executed by the
> CPU on the target platform.
> On the other hand, AFAIK, currently all versions of Project Oberon running
> on Windows, MacOS, Linux etc. ARE emulated. In this case, the compiler
> generates RISC5 instructions that are then 'interpreted' by a software
> emulation of the RISC5 CPU. Each RISC5 instruction results in tens
> (hundreds?) of Intel (or whatever CPU is being used to run the OS) CPU
> instructions being executed.
> Note that Project Oberon running on FPGA hardware is not emulated. Every
> RISC5 instruction generated by the compiler is executed directly by the
> RISC5 CPU implemented in configurable hardware.
> It's as clear as mud ... ;-)

Useful clarification -- thank you!

I must admit, I don't feel so bad about getting it wrong now! 😊

I also note that various people have done a lot more work on the Wikipedia
article about Oberon, and that it's a whole year since I last worked on it.
I feel a bit guilty about that. There's a version history table in there
now, but IMHO it still needs a bit more info.

I think I now understand the relationship, more or less, between:

• Oberon System 3, AKA ETH Oberon – on x86 (Native Oberon) & hosted on x86
• Oberon V4, AKA Linz Oberon – implemented in Oberon 2 – on Ceres & hosted
on x86
• AOS, AKA Bluebottle, AKA A2 – implemented in Active Oberon – on x86, ARM
and hosted
• Project Oberon, AKA Oberon V5 – implemented in Oberon-07 – on RISC5 &

Is that right?

What is ETH Oberon written in? Original Oberon, what we might call Oberon 1?

Liam Proven – Profile: https://about.me/liamproven
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