February 2021 - 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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Re: [Oberon] _Compiler_Construction_ by Niklaus Wirth
by peter＠easthope.ca 17 Nov '21

17 Nov '21

P.s. for interest. From: peter(a)easthope.ca Date: Thu, 07 Jan 2021 08:37:22 -0800 > Currently the cheapest copy of _Compiler_Construction_ is 43.09 US$, > delivery in the USA included. Appears the copy posted at 43.09 US$ was sold that day. Subsequently the vendor listed another copy at 105.61 $US. The book market can be as volatile as the stock market. Regards, ... P. L. -- Tel: +1 604 670 0140 Bcc: peter at easthope. ca

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Usenet group comp.lang.oberon is no longer accessible
by Chris Burrows 30 May '21

30 May '21

The Usenet group 'comp.lang.oberon' which I normally access through Google Groups has recently become unavailable with the message: "Banned content warning: comp.lang.oberon has been identified as containing spam, malware, or other malicious content." https://groups.google.com/g/comp.lang.oberon While it is true that spammers occasionally attacked this group (I usually reported such attacks - maybe I shouldn't have?) there was about 30 years' worth of historically significant discussions about Oberon contained in the archived messages so it is an extreme case of 'throwing the baby out with the bathwater'. I reported the access problem to Google Groups about a week ago but haven't heard back yet. Does anybody know how to restore access to this group? If you are unfamiliar with what I'm talking about, see the similar Usenet discussion group comp.lang.modula2 which is still active and accessible: https://groups.google.com/g/comp.lang.modula2 Thanks, Chris Burrows CFB Software https://www.astrobe.com

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Re (2): Re (2): Catalog
by peter＠easthope.ca 27 Feb '21

27 Feb '21

From: Nemo Nusquam <cym224(a)gmail.com> Date: Sat, 27 Feb 2021 12:19:30 -0500 > I tried surfing there and was informed: > Authentication Required > A username and password are being requested by > https://svn-dept.inf.ethz.ch. The site says: > "ETH Zurich LDAP Authentication" For record rather than to restrict access. Credentials published at http://cas.inf.ethz.ch/projects/a2/ . --username infsvn.anonymous --password anonymous Also in the wikibook. https://en.wikibooks.org/wiki/Oberon/A2#Sources,_Tools_and_Configuration_Te… Regards, ... P. L. -- cell: +1 236 464 1479 Bcc: peter at easthope. ca VoIP: +1 604 670 0140

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Re (2): Catalog
by peter＠easthope.ca 27 Feb '21

27 Feb '21

Hello Ivan, Fri, 26 Feb 2021 at 05:32, Ivan Denisov <d.ivan.krsk(a)gmail.com> wrote: > https://oberon.org The catalog is valuable, thanks! https://oberon.org/en has a link for www.ocp.inf.ethz.ch . To my knowledge the ocp was decommissioned around the end of 2020. There is now an SVN repository. https://svn-dept.inf.ethz.ch/svn/lecturers/a2/ Regards, ... P. L. -- cell: +1 236 464 1479 Bcc: peter at easthope. ca VoIP: +1 604 670 0140

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50 years of Pascal by Niklaus Wirth
by Pablo Cayuela 26 Feb '21

26 Feb '21

https://m-cacm.acm.org/magazines/2021/3/250705-50-years-of-pascal/fulltext

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Oberon compiler construction videos
by Arthur Yefimov 26 Feb '21

26 Feb '21

Recently in Riga we started a new YouTube channel called "Programming in Oberon", where we publish our Oberon-related videos. Right now we are focused on using Blackbox to create a convenient console cross-platform Oberon compiler that would work something like fpc or gcc. The idea of starting an YouTube channel was somewhat spontaneous, so the first video starts "from the middle" and talks about recursive module traversal (creatation of a list of modules for compilation and linking). The videos are in Russian language, however we made subtitles that can be autotranslated on YouTube to any other language. I checked English, and it turned out to work quite well. I will probably also add manual English subtitles later. Here is the link: https://www.youtube.com/channel/UCfaaot6JjktvqQCUOkXxEsA/featured We will be happy to hear some comments. Best regards Arthur Yefimov

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Re (2): Re (2): Indentation in V2 sources.
by peter＠easthope.ca 15 Feb '21

15 Feb '21

From: Joerg <joerg.straube(a)iaeth.ch> Date: Mon, 15 Feb 2021 09:18:20 +0100 > If you like monospaced fonts you should adapt the font-family. > ... > <span style="font-family: Monaco, monospace; ... OK, thanks. Currently the MediaWiki module handles two cases. (1) MediaWiki.Markup reads an Oberon Text and produces markup which produces a page which imitates the original Text. ETH Oberon has the Courier font. Markup for characters in the Courier font will be tagged <span style="font-family: Courier, monospace; ...">. To my knowledge, a contemporary browser is likely to recognize "Courier"; if Courier is not available another monospace is likely to be substituted. The output syntax is in the MediaWiki module at line 37. https://en.wikibooks.org/wiki/Oberon/A2/Oberon.MediaWiki.Mod The conversion of the Text typeface attribute to the HTML tag begins at line 266. "IF extantAttr.typeface # globalAttr.typeface ..." This conversion process is satisfactory. (2) To produce markup for a text from a PDF, the original Oberon Text is not directly available. Probably typeface can be extracted from PDF; I don't know how. The PDF reader displays the document but doesn't give me attributes. Visually I can recognize serif vs. sans serif and fixed pitch vs. variable pitch. Then I can impose a typeface. My MediaWiki module has a simple means to do that; not yet in the book. My immediate question: what font-family specification for serif, variable pitch will be recognized by most browsers? An answer will allow me to complete case (2). Thx, ... P. L. -- cell: +1 236 464 1479 Bcc: peter at easthope. ca VoIP: +1 604 670 0140

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Re (2): Indentation in V2 sources.
by peter＠easthope.ca 15 Feb '21

15 Feb '21

From: "Chris Burrows" <chris(a)cfbsoftware.com> Date: Mon, 15 Feb 2021 11:44:31 +1030 > I like to use monospaced fonts when writing code so that every column > of characters is aligned. > > If I was putting code samples in Wikibooks I would follow guidelines like > those specified, for example, in the REALbasic/Style Guide: > > https://en.wikibooks.org/wiki/REALbasic/Style_Guide The OCC module is from the original _Project_Oberon_ book. I want to preserve the appearance in the PDF reasonably closely. https://en.wikibooks.org/wiki/Oberon/V2 I'd be happy to use monospace for code I've written. > The indentation probably appears more narrow because different fonts are > used. > > This is always very subjective. What I prefer could easily irritate somebody > else. I like to use monospaced fonts when writing code so that every column > of characters is aligned. > > I did try the <code> tag in the Sandbox with an Oberon example and that > inserted additional blank lines. Surrounding code with the <pre> </pre> tags > seemed to work well. The whole source is enclosed with these tags. <pre><span style="font-family: Oberon, Helvetica, sans-serif; font-size: 0.80rem; font-weight: normal; font-style: normal; color: #000000; position: relative; top: 0%"> ... </span></pre> The <pre> tag comes from the blank beginning each line in the markup. Now I remember choosing the font-family for similarity to the font in ETH Oberon. The font in the sources in _Project_Oberon_ is serif. In Linux Firefox, DejaVu serif should work. A serif variable pitch font available in all familiar browsers would be ideal but I have no idea of serif fonts in browsers in MacOS and MS Windows. Suggestions? Thanks, ... P. L. -- cell: +1 236 464 1479 Bcc: peter at easthope. ca VoIP: +1 604 670 0140

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