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   Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:09 JST Stéphane Bortzmeyer

   Good morning, Brussels! Second day of #FOSDEM.

   Let's start with a bit of #RISCV (RISC-V but hashtags cannot contain dashes, can they?)

   https://fosdem.org/

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:02 JST Stéphane Bortzmeyer

     in reply to

     Nice to allow participants to see it closely.

     Haelwenn /элвэн/ :triskell: likes this.
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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:03 JST Stéphane Bortzmeyer

     in reply to

     It is Harvard, not Von Neumann (ROM and RAM are reachable on different buses).

     The CPU was a Texas Instruments.

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:05 JST Stéphane Bortzmeyer

     in reply to

     Now, retrocomputing at #FOSDEM.

     First, The big adventure of little professor and its 4-bits handheld friends running TMS 1000 by Christophe Ponsard

     (The little professor with the ridiculous moustache.)

     http://www.datamath.org/

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:06 JST Stéphane Bortzmeyer

     in reply to

     Lessons from porting software to RISC-V at RISE by Ludovic Henry

     Some programs have erroneous assumptions, which are true for x86 but not for every processor type.
     https://landscape.riscv.org/

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:07 JST Stéphane Bortzmeyer

     in reply to

     You can develop your own plugins for MAMBO, to modify the binary code according to your wishes. You can register functions for all events, pre or post event.

     The code of the function does not depend on the processor type, MAMBO provides a high-level view of the intstructions. (But you can also use specific RISC-V instructions.)

     Demo with vim running on RISC-V, under the control of MAMBO so we can patch vim binary to count the number of branches (zero assembly language required).

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 22:57:08 JST Stéphane Bortzmeyer

     in reply to

     The #RISCV devroom is far from full. You can come, if you were not able to get into your first choice room. (And there are T-shirts !)

     First, after a change in schedule, MAMBO - Dynamic Binary Modification Tool for RISC-, by Igor Wodiany, John Alistair Kressel
     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:00 JST Stéphane Bortzmeyer

     in reply to

     OK, MS-DOS runs but most applications don't: they need a PC BIOS. So, the Commodore must be made PC-compatible.

     Demo: Norton Commander (what else?) on FreeDOS.

     #FOSDEM

     Haelwenn /элвэн/ :triskell: likes this.
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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:02 JST Stéphane Bortzmeyer

     in reply to

     Running DOS & Unix on an 8-bit Commodore by Michal Pleban

     I wonder if it runs systemd and Gnome also.

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:03 JST Stéphane Bortzmeyer

     in reply to

     I learn that there is a guy who wrote a Lisp compiler for the Gameboy so he can re-implement old games in Lisp.

     #FOSDEM

   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:04 JST Stéphane Bortzmeyer

     in reply to

     Now, Gameboy Advance hacking for retrogamers by Daniele Scasciafratte

     The CPU was a 16,78 Mhz...

     #FOSDEM

   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:05 JST Stéphane Bortzmeyer

     in reply to

     Then the museum built a Big Professor (3D-printed case, Arduino inside, running the emulator) so parents can experience nostalgia and kids play with a more recent machine.

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:00:06 JST Stéphane Bortzmeyer

     in reply to

     Processors of this time still allowed to decap and to scan the chip. (Do not try with modern processors.) Useful for retro-engineering and then emulating.

     #FOSDEM

   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:09:01 JST Stéphane Bortzmeyer

     in reply to

     Applause in the room when the machine compiles (very slowly, at 6 Mhz) a C program and runs it.

     #FOSDEM

     Haelwenn /элвэн/ :triskell: likes this.
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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:09:03 JST Stéphane Bortzmeyer

     in reply to

     Now, Unix. Processor Zilog 8001 on the second CPU slot, to run Coherent (an Unix-like).

     #FOSDEM

   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Sunday, 04-Feb-2024 23:25:00 JST Stéphane Bortzmeyer

     in reply to

     • JP Mens

     @jpmens https://en.wikipedia.org/wiki/Little_Professor

   • Embed this notice
     JP Mens (jpmens@mastodon.social)'s status on Sunday, 04-Feb-2024 23:25:01 JST JP Mens

     in reply to

     @bortzmeyer

     Professor Calculus (Professeur Tournesol) ?

     feld repeated this.
   • Embed this notice
     feld (feld@bikeshed.party)'s status on Sunday, 04-Feb-2024 23:25:23 JST feld

     in reply to

     • JP Mens
     @bortzmeyer @jpmens core memory unlocked ...
   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:17 JST Stéphane Bortzmeyer

     in reply to

     The Sanco boots from a floppy. (OS is CP/M)

     #FOSDEM

     Haelwenn /элвэн/ :triskell: likes this.
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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:19 JST Stéphane Bortzmeyer

     in reply to

     It all started with an abandoned computer... Where is the documentation?

     Opening it, there is a Z80, and a ROM.

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:21 JST Stéphane Bortzmeyer

     in reply to

     A journey documenting the Sanco 8003 computer by giomba, giuliof

     (Sanco was a French company https://fr.wikipedia.org/wiki/Sanco 🇫🇷 🐓

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:22 JST Stéphane Bortzmeyer

     in reply to

     PiStorm - The evolution of an open source Amiga accelerator by Andrew Hutchings

     [The slides run on an Amiga.]

     Insert mandatory demo of DOOM and QUAKE..

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:23 JST Stéphane Bortzmeyer

     in reply to

     The AgonLight2 uses a Z80. What about the 6502?

     He built, Neo6502, a machine with a 6502 but with another chip, an ARM, that emulates everything (so the 6502 does not know he lives in the Matrix).

     #FOSDEM

   • Embed this notice
     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:25 JST Stéphane Bortzmeyer

     in reply to

     He introduces the AgonLight2, a recent machine but built to run old software. https://www.olimex.com/Products/Retro-Computers/AgonLight2/open-source-hardware

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:27 JST Stéphane Bortzmeyer

     in reply to

     Neo6502 in the Matrix - open source hardware and software modern retro computer with software defined architecture by Tsvetan Usunov

     The speaker started in Bulgaria with an Apple II clone, the IMKO-2 (Pravetz-82).

     #FOSDEM

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     Stéphane Bortzmeyer (bortzmeyer@mastodon.gougere.fr)'s status on Monday, 05-Feb-2024 00:50:28 JST Stéphane Bortzmeyer

     in reply to

     A Game Boy and his cellphone by Esteve Varela colominas

     An old japanese-only service, quickly discontinued, to connect the Gameboy to the Internet.

     #FOSDEM