Welcome to the WUDSN ursel home page

WUDSN ursel - or short WUDSN - is a demo group founded in 1991. There is an explanation why the group and the site are named like that, but that's a different story you can find in the FAQ. For the time being it should be sufficient for you to know that I, aka JAC! am one of the members ever since. I have created this web site to offer my tools and productions and to share the fun I have had for more than 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 this personal interview that I gave for ANTIC - the Atari 8-bit podcast.

Spielentwicklung in 6502 Assembler für 8-Bit Heimcomputer (German)

Thomas Schulz (8bitjunkie) explains the basics of game development for 8-bit home computers in 6502 assembly. He explains it using modern tools like Raster Music Tracker, WUDSN IDE and cool retro T-shirts with source code prints. Video is in German and was recorded at the Vintage Computing Festival Berlin (VCFB) 2016.

Thomas Schulz (8bitjunkie) erklärt die Grundlagen für die Entwicklung von Spielen für 8-Bit Heimcomputer in 6502 Assembler. Hierbei helfen moderne Tools wie Raster Music Tracker,  WUDSN IDE und coole Retro-T-Shirts mit Source Code darauf.

  • Um was geht es überhaupt?
  • Vorstellung des Spiels "GetUp!" (Live Demo)
  • Übersicht über die Vorgehensweise und die Werkzeuge
  • Der Hauptprozessor (CPU)
  • Die Unterbrechungen (Interrupts)
  • Die Grafik
  • Die Musik
  • Hilfreiche Quellen

30.000 views later - WUDSN IDE in a book

While everything in the world is turning into bits, some bits of WUDSN IDE have turned into some pages in a real world book. Thomas Schulz ilustated how what WUDSN IDE is and how cross-devlopement works in his chapter of the book Time to Play - Zeit und Computerspiel published by members of the Humbold University in Berlin. When I think back how I started with WUDSN IDE in 2009 ... I would never have thought of being an enabler for such great things like Dimo's Quest and so many other games and programs. Now, 7 years later my site has crossed the 30.000 views boundary, the IDE has over 130 active installations and became friends with many new Atari users. All this is simply great and I hope we'll a have lots of funs together in future. 

The IDE screen with the project, outline, editor and message panel.

The rainbow example program explained step by step to learn what "racing the beam" means.

6502 Assembler workshop on game development with WUDSN IDE

On 2nd and 3rd of July 2016, an interactive workshop on programming games in 6502 assembler will take place in Bad Oeynhause in Germany. It will be held by Thomas Schulz aka 8Bitjunkie, the author of Dimo's Quest on both the Amiga (original version) and the Atari 8-bit. WUDSN IDE is used as the development environment for the workshop. The workshop is targeting absolute beginners and will be held in German. If you are interested, sign up to the Facebook page of the event. I know many people who are reading this dreamed of writing their own games when they were young. So get up and join the workshop, it's the best chance to finally make your dream come true.  

The!Cart - 3D printable cartridge shell models available

The original The!Cart was delivered with a rather cheap shell in order to keep the overall price low. Sven Pink from the A.B.B.U.C. created a first version of a 3D printable shell back in 2015, but it was never officially released to the public. Only one protype was printed back then, which I own. Sven is lacking the time to and I am lacking the skills and equipment to continue the design. So I decided to release the files in the their current state. You can download the OpenSCAD (".scad") and stereo lithography (".stl") files for printing your own shell for the first version of "The!Card". If you manage to get usable results and maybe create improved versions of the model, I'd be happy to add pictures of your shells here and update the download accordingly. Visit the new The!Cart page for more details.  You can also visit the corresponding thread on AtariAge for questions and feedback.

The!Cart Shell, front, closed The!Cart Shell, opened, PCB fittedThe!Cart Shell, opened, PCB remove