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Adventures of Developers of Debian

Submitted by Roy Schestowitz on Tuesday 24th of December 2019 04:31:44 AM Filed under
Debian
  • european train systems

    now what about the trains? bruxelles is the capital of europe, & laveno-mombello is just approx. 400 km from here (i.e. closer than the capital of my country). still, no train company would sell my a ticket to these destinations.

    no train company? well that's slightly exaggerated. for one of the destinations (bruxelles), one company (DB) would sell me a ticket, if I trick the web interface into showing me the connection I want by adding some 'via' entries with appropriate durations. ÖBB fails because it doesn't sell thalys tickets, & also no ICE tickets, for the last leg. – so either DB with some trickery, or ÖBB plus either thalys or DB, & hope that there are no delays.
    ÖBB is also very proud of their new nightjet connection to bruxelles (from vienna & innsbruck), starting in january 2020. what they don't announce widely is that this train goes only 2 times per week. (of course not the days I need.)

    for the trip to laveno-mombello I could either go via verona/milano & buy a ticket from ÖBB until verona & a ticket (actually three) from trenitalia for the rest; or go via switzerland & buy a ticket from ÖBB until bellinzona, a ticket from SBB for the 10+ minutes to cadenazzo, & a ticket from trenord from cadenazzo until laveno-mombello. (that's already the summary; neither ÖBB nor DB nor SBB nor trenitalia nor trenord would sell me a ticket for the whole journey. trenitalia also doesn't know cadenazzo, btw. ÖBB would also sell me a ticket to cadenazzo, it's just roughly 100 EUR more expensive than the sparschiene-ticket to bellinzona.)
    two years ago I did the former; & 8 of the 8 trains were delayed on departure or arrival or both. obviously the trip with its three changes per direction took almost twice the time of just taking the car.
    last year, a friendly soul picked me up with their car after one train trip, & probably we'll do it the same way again this year.

  • Other Vintage Computer Replication Projects

    A few weeks back, I was showing my PDP-8/e project at the Vintage Computer Festival in Zurich. While I was doing my project, I haven’t really checked if there were other projects like this. At least for the PDP-8 I knew there wasn’t, the only FPGA core I could find was a new implementation of the architecture that is binary compatible but doesn’t attempt to replicate the structure and instruction cycles of any specific PDP-8.
    At this VCFe I found there were two other projects that also aim at recreating computers in FPGAs from original schematics. One is a DEC PDP-6, the other is an IBM System/360 Model 30. The IBM one is also interesting in that it appears to create a live image of the front panel state on its VGA output. At the VCFe however, it was connected to an original front panel, making it much more impressive.
    From talking to the people involved in these projects I gathered that they have some challenges with the lack of a central clock that drives synchronous logic, a design method that is central to modern logic and the kind of hardware that can most efficiently be implemented in FPGAs. Apparently there are many places where logic delays were integral to both the PDP’s and IBM’s logic, and those are not simple to implement especially when the delay is not well documented in the schematics.

  • Romain Perier: My Raspberry PI 4 4GB

    I have received my Raspberry PI 4 4GB that has been funded by the Debian project. I would like to thank the DPL and Gunnar Wolf for this (who vouched for me).

    So today, I have unpacked the board and tested it with the default flashed noobs/raspbian, so I check that everything is working as expected (from the hw point of view, I already had bad suprises in the past with some evaluation boards).

    Interesting topics will come soon, mostly about booting a debian testing/sid on it , adding support to raspi-firmware and the linux kernel for enabling support for the pi 4 and some variants drivers for the bcm2711.

»

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