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Welcome to the WUDSN ursel home page

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Published: 01 July 2009
Hits: 10977

WUDSN ursel - or short WUDSN - is a demo group founded in 1991. There is an explanation for why the group and the site are named like that, but that's a different story you can find in the FAQ. It should be sufficient for you to know that I have always been one of the members: Peter Dell - aka JAC! -  I have created this website to offer my tools and productions and share the fun I have had for over 20 years now with my Atari-8-bit computer and other classic computers. To learn more about me and what I'm doing, check out my interview in the ANTIC - the Atari 8-bit podcast.

Street Fighter II for Atari 8-bits now supported by The!Cart and The!Cart Studio

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Published: 28 March 2026
Hits: 1

Did you think the people who run 50-year-old Atari computers would let down Atari hardware like The!Cart just because it's 13 years old? The!Cart was designed to evolve - a bit like the famous Voyager spacecraft.

We have evolved the software a lot over the past 13 years, but the hardware and the hardware logic (CPLD) were stable when it went into production. It had to be, because there's no easy way to update it for the users. Hias did an awesome job of encoding all the ROM types into the limited CPLD space then. No way to get anything more into that. Keep in mind that all this predates the FPGA era, when such things became standard.

But the Street Fighter II release somehow triggered him so much that he went back to revisit the logic and rearrange it to free some gates after all this time. Seriously, that is one of the most unlikely things that has ever happened to me.

Then it took 4 people 3 days with soldering, 20-year-old Windows XP machines with Xilinx ISE 10 and Fujnet to validate the CPLD gate updates hias crammed the into The!Cart logic. Thanks to Dr. Z for hosting the Midwinter Meeting again, and to him, Beetle, and Insane for their outstanding support.

Cartridges with the updated logic now also support 4 MB and can run the excellent Street Fighter II conversion by Vega and his team. And despite the phone's poor quality in capturing the CRT, it was worth the effort. And it's great to have this game on the Atari 8-bit now.

We plan to prepare a Windows XP machine with the right software and hardware so we can take it to meetings/conventions.
So people who do not have the hardware to update the CPLD can bring their The!Cart, and we upgrade it.

The new version of "The!Cart Studio" is published here. The documentation has been updated accordingly.

  • Added "Flash MegaCart 4 MB" (cartridge type 63) as supported The!Cart mode 37. This mode is required to run cartridges like Street Fighter II. To use it, you also need to have the latest CPLD logic update.
  • Updated the sections for the CPLD logic updates and the troubleshooting.
  • Fixed the start-bank computation for cartridges with 16k bank size.
  • Updated the "The!Cart" flasher software to version 2026-03-22, which supports the new The!Cart mode 37 and has the latest high-speed SIO and MyPicoDos.

For questions, join the AtariAge Thread.

Revision 2025

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Published: 22 April 2025
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The 2nd Revision party after Corona has ended was a blast. I met Prodadron and Lycan and attended a very interesting seminars "Writing/Building a 3D geometry engine from scratch" by Qubix/Architects and "The Sorbus Computer - or how I built my own $10 retro computer" by SvOlli. After talking to Qubix, we both spent the rest of the party porting his real-time 3D engine for the Commodore VIC-20 to the Atari 8-bit.

HomeCon 83

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Published: 30 March 2025
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On 29.03.2025, Bernhard, Stefan, Jan, and I attended HomeCon #83 in Hanau. It was a lovely, small, and enjoyable party where we met many new people. Here are some impressions. Bernhard obtained a nice Intellivision, and because it needed some treatment, we drove further to the Flipper- und Arcademuseum Seligenstadt (FAMS). There was a very helpful guy who fixed the console and then showed us the exhibition. And the day ended with a surprise techno event in the city center of my hometown. What a great day!

 

CBM/PET and C64 programs by Bernhard Kirsch (Biobern)

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Published: 28 January 2025
Hits: 1618

Most people who visit this website probably remember creating their first programs in BASIC on their first computer as teenagers in the 1980s. We recently recovered some of these early programs from Bernhard Kirsch's 40-year-old disks. He started programming on his first computer, a CBM/PET, and later moved to a C64 in 1983. I've compiled a few pages with a description, a short video, and screenshots.

For CBM/PET

  • Kirsch Pac Man


  • Luftpost
  • Snake

For C64

  • Autolyrik
  • Bulldoze!
  • Dark Star


  • Dragster Crash

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