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.

Fujiama 2017

After 3 years I finally managed to attend the Fujiama party again. This time even with Tigerduck and for 3 days from 10-13th August 2017. Sascha created nice 2D (see below) and 3D (see here) impressions of the party place. We had lots of fun with Atari 850 repairs, Tempest Elite VBXE bug fixing, learning Mad Pascal, testing and fixing DIS6502 on/for Windows 95 (YES!), UAV hardware modding, MAC/65 tools hacking, multi-joy gaming and crazy Arduino stuff. And we had a new visitor record - thanks Helmut for making all this possible once again! 

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No, I did not forget the "S"

The book is really called "Asembler 6502" because it is a Polish book. It is a complete remake of the same book from 1987, with two additional chapters about WUDSN IDE and illegal opcodes. The additional chapter about WUDSN IDE was written by Marcin Sochacki from the ABBUC. Thanks Marcin, this is really awesome for me. Especially because in the 90ies being a "Poland Game" was a true sign of quality - and now the Polish coders use my IDE. What more can you achieve in life!

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ABBUC in a Box - 30 Years Atari Bit Byter User Club

In December 2015, the A.B.B.U.C. celebrated its 30th anniversary. A small team of club members invested countless hours into making all content, disks and magazine issues and special magazines of these 30 years available in a convenient and easy to consume form on DVD. It was released one year ago in June 2016 and given as annual special to all 450 members of the club.

I spent weeks debugging other people's code from 198x to make it work out of the on modern configurations. You wouldn't believe how much of the programs actually only work because of pure luck. Well, people were new to the platform, documentation was basically not available. So you POKEd around until you found a way that worked and released the program to the public. At one point, after months of work, the content management system of the main editor broke and took all the work to hell. After going through the valley of despair, we rebuilt it all from scratch in a way so I could also automatically generate an HTML menu that works on all host platforms. Ultimately the work resulted even in improvements to Altirra's OS emulation and a German Quick Start Guide for Altirra.

If you are interested in the Atari 8-bit computer and the DVD and are not yet a member of the A.B.B.U.C., you really should changed that. The annual member fee is still 50 Deutsche Mark as it was in 1985 when it all began. That's 36 EUR in todays currency. You get double sided 5¼ inch floppy disk with news and programs plus a full color printed paper mag quarterly. In addition there are special mags and annual specials and events. The disk and paper mag are in German, because that is the native language of most members (apart from ATARI BASIC of course). Yet the A.B.B.U.C. forums are open for English threads and posts, too.

Silly Venture 2k17 Invitro and Web Site Released

Almost 4 years have passed since my last VCS release, but finally it is done. And today my Silly Venture 2017 Invitro was released together with the new Silly Venture web site.

Both effects in this demo are 4 years old an were originally planned for Sillyventure 2k14. But back then I didn't have any music and ultimately that kept me from coding for the VCS. Back then no usable tracker existed, so getting music are no feasible in the foreseeable future. The sine scroller used almost the complete RAM, so it was clear it was going to be tough. In addition kk and Kylearan created new stuff using k65, which is basically unbeatable when it comes to coding for bank switching modules. The latter is really a nightmare why you have to do it manually.

During that period, Kylearan created TIA Tracker and changed the VCS world. Finally musicians didn't have to be coders anymore. At Revision 2017 Flush released .bin with three 3 outstanding tunes created by Glafouk using TIA Tracker. That was very motivating, esp. with Nick Montfort, Flush and Kyleraran at the party place. Therefore, when Grey announced that there is going to be a Sillyventure in 2017, I decided to take the effects together with my favorite tune and create this invitation and finally release the stuff.

Read the full story and technical details here.