August 2020 - Oberon - mailman3.inf.ethz.ch

Re: [Oberon] Emulators
by Jörg 14 Feb '22

14 Feb '22

Wojtek > How can I proceed, in practical terms, to use your JS emulator for development? Perhaps we should start discussing, WHAT you want to change. At the moment I see three different levels of HW modifications: easy, more difficult, impossible. Basically, see an emulator as virtualization. In virtualization you have a host machine (where the emulator runs on) and a guest machine (this is the FPGA board). I ignore „containers“ at the moment Easy: if you want to extend the RISC-5 instruction set in Verilog (eg add an autoincrement instruction) the modification of the emulator is rather straight forward. I neglect the fact that you have to modify the Oberon-07 compiler to use this new instruction, because this is not important for the emulator. More difficult: if you want to add IO mapped HW (eg Ethernet or Wifi) or memory mapped HW (eg color display) to your FPGA and the host machine has an equivalent of this HW, with a little bit of effort the emulator can be modified to map the IO register commands or new memory layout to the corresponding host HW. Impossible: if you want to add HW to your FPGA and the host machine does not have an equivalent HW (eg a neutrino sensor) then it‘s impossible for the emulator to mimic the new FPGA HW. br Jörg

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Wanted: Oberon Syntax in TextMate, Sublime Text or Atom Grammar
by Treutwein Bernhard 01 Jan '22

01 Jan '22

Does somebody have grammars for Oberon / Oberon-2 / Component Pascal / Active Oberon as grammar for TextMate / Sublime Text / Atom Background: Github wrongly classifies Oberon / Oberon-2 / Component Pascal / Active Oberon as Modula-2. I opened quite some tiome ago an issue in the github/linguist project (https://github.com/github/linguist/issues/3888) and they don't accept EBNF grammars. -- Bernhard Treutwein

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A technote for automatically running batch job on system startup
by Charles Perkins 23 Dec '20

23 Dec '20

Hello everybody, I wrote a note on how to have Oberon automatically run a startup script. I introduced two small changes to TextFrames.Mod (five lines total) introducing a 'Call Message' and then handling that message with a call to the Call procedure, and three small changes to System.Mod (eight lines total) introducing two variables, opening a viewer with a predetermined text file, and then sending the call message to the viewer at the end of system initialization. https://github.com/io-core/technotes/blob/main/technote013.md I used Michael Schierl's Batch.Mod for the actual batching of commands but Andreas Pirklbauer's system would have worked just as well, or any other batching or script system. The above changes merely call the first command in a text file, the rest of what happens is up to that command. I did this to make building and testing my own system more automatic but I thought I'd share in case anyone found it interesting or useful Best Regards, Chuck

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Re (2): Names and genealogies.
by peter＠easthope.ca 21 Oct '20

21 Oct '20

From: Joerg <joerg.straube(a)iaeth.ch> Date: Mon, 22 Jun 2020 22:48:04 +0300 > So just forget S3, System3 and other names you might have come along OK, thanks Joerg. in the front page, https://en.wikibooks.org/wiki/Oberon , I've made the changes "S3" => "ETH Oberon". The former page https://en.wikibooks.org/wiki/Oberon/S3 is now https://en.wikibooks.org/wiki/Oberon/ETH_Oberon . Sub-pages also renamed accordingly. The change is also done in https://en.wikibooks.org/wiki/Oberon/sitemap . Several red links remain there until I can salvage the pages. Meanwhile, most can be reached via the WayBack link in the green box. I have not proof read yet and am unlikely to have much time before winter weather returns. Will try to correct any erros reported. Regards, ... P. -- https://en.wikibooks.org/wiki/Medical_Machines https://en.wikibooks.org/wiki/Oberon Tel: +1 604 670 0140 Bcc: peter at easthope. ca

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Linux A2 (Ubuntu 20.04 LTS), fonts too small to read
by R. S. Doiel 10 Sep '20

10 Sep '20

Hello everyone, I am new to Oberon so this is very much a new user question I am afraid. I am trying out A2 on Ubuntu 20.04 LTS laptop. My vision is not what it was when I was younger and the 12 point fonts in the A2 desktop are tiny. Short of downgrading the resolution of my laptop's display before starting aos is there a way to tell A2 to use larger fonts or is there a way to "zoom in" on the screen so I can read things? Thanks for the help in advance. All the best, Robert

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GC of Extended Oberon now also works if MemLim = N*256
by Andreas Pirklbauer 29 Aug '20

29 Aug '20

The scan phase of the garbage collector of Extended Oberon now also works if MemLim is a multiple of 256. Thanks to the uses of the system for the input on this over the past few days - it helped arriving at a satisfactory solution quickly. The key is to check for p < heapLim during the scan phase at the right places.

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GC for dynamic arrays of recordsin Extended Oberon fixed
by Andreas Pirklbauer 28 Aug '20

28 Aug '20

> Moving fast lets you sleep longer. It does not > let you today attend tomorrow's dinner. From my point of view your clock is ticking slower and still shows Aug 28, so my today is your yesterday..

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GC for dynamic arrays of records in Extended Oberon fixe
by Andreas Pirklbauer 27 Aug '20

27 Aug '20

> "MODULE Kernel; (*... AP 1.9.20 Extended Oberon*)” you > are way ahead of us normal mortals... ;-) > Anyway, thanks for the correction. Hellwig I move at close to the speed of light, so this is clearly a relativistic effect..

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GC for dynamic arrays of records in Extended Oberon fixed
by Andreas Pirklbauer 27 Aug '20

27 Aug '20

> Indeed there is some neat stuff in Extended Oberon. I am trying to > wrap my head around exactly how the type-bound procedures work. They work just as in the Original Oberon-2 language spec. For some examples, see the Sources/TestTypeBoundProcedures directory at https://github.com/andreaspirklbauer/Oberon-extended/tree/master/Sources/Te…

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GC for dynamic arrays of records in Extended Oberon fixed
by Andreas Pirklbauer 27 Aug '20

27 Aug '20

The Extended Oberon GC for dynamic arrays of records previously used an incorrect increment when traversing the array of pointer offsets in the type descriptor of the record (1 instead of 4). This is fixed now. See Kernel.Mark.

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