Kadlec's 256-Byte DOS Intro Wins Riverwash, Scene.org Tech Awards
JanRrrolaKadlec
A 256-byte x86 assembly program clinches the Scene.org Best Technical Achievement Award after winning Riverwash 2009 by generating standalone visuals within an extreme MS-DOS footprint.
AI-assisted summary of puls (256 bytes) — original source. Check the original for full context.
Source published:
Key ideas
- Jan Kadlec (JanRrrola) demonstrated "puls", an MS-DOS intro achieving complex visual rendering within a strict 256-byte executable footprint. (0:00)
- The production earned top honors at Riverwash 2009, winning 1st place in the demoparty's 256-byte competition. (0:00)
- "puls" was awarded the Scene.org Award for Best Technical Achievement in 2009 for its assembly programming accomplishments. (0:00)
- The intro is compatible with modern emulation environments like DOSBox as well as bare-metal PCs running FreeDOS. (0:00)
Detailed notes
## Background Published on YouTube by JanRrrolaKadlec on September 28, 2009, this video showcases "puls," a 256-byte MS-DOS intro. The description highlights that the production won the 256-byte competition at Riverwash 2009 and earned the Scene.org Award for Best Technical Achievement, providing links to the executable, Pouët discussions, and commented x86 assembly source code.
## TL;DR The video features a complete presentation of the award-winning MS-DOS demoscene production "puls." Running from a microscopic 256-byte executable, it renders smooth, complex procedural visual effects using highly optimized x86 assembly. The demonstration showcases the visual output compatible with DOSBox or native FreeDOS environments, ending with a brief spoken acknowledgment expressing gratitude to the viewers.
## Atmosphere & style The presentation carries a minimalist, focused, and technically reverent atmosphere characteristic of underground demoscene showcases. Watching intricate algorithmic visuals unfold from a seemingly impossible byte budget feels hypnotic and quietly astonishing. The clip concludes on an understated, authentic note as the audio softly captures a brief, humble "Thank you. Thank you."
## Bulletin - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) Jan Kadlec (JanRrrola) demonstrated "puls", an MS-DOS intro achieving complex visual rendering within a strict 256-byte executable footprint. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The production earned top honors at Riverwash 2009, winning 1st place in the demoparty's 256-byte competition. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) "puls" was awarded the Scene.org Award for Best Technical Achievement in 2009 for its assembly programming accomplishments. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The intro is compatible with modern emulation environments like DOSBox as well as bare-metal PCs running FreeDOS.
## Key takeaways - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) "puls" is a demoscene production constrained to an extreme limit of just 256 bytes. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The project was created by programmer Jan Kadlec, active under the scene handle JanRrrola. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The intro is written directly in x86 assembly language to maximize graphical output within minimal storage. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) It achieved 1st place in the 256-byte competition at the Riverwash 2009 demoparty. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The production earned the prestigious 2009 Scene.org Award for Best Technical Achievement. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) Execution is supported on vintage or modern PC hardware booted into FreeDOS, as well as through DOSBox emulation. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) Fully commented x86 assembly source code was made publicly available and archived on Pouët. - [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) The live showcase captures audience reactions, concluding with brief spoken acknowledgments thanking viewers.
## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=R35UuntQQF8&t=0s) Presentation of the 256-Byte Intro "puls"
The clip captures the showcase of *puls*, a 256-byte MS-DOS intro created by Jan Kadlec (JanRrrola). The production achieved significant acclaim within the demoscene, winning the 256-byte intro competition at Riverwash 2009 and later receiving the prestigious Scene.org Award for Best Technical Achievement in 2009. Designed to run under MS-DOS, it executes smoothly in DOSBox or on physical PC hardware booted into FreeDOS, pushing extreme visual effects out of a tiny executable footprint of just 256 bytes of x86 assembly code.
As the presentation plays out, the recorded audio concludes with a brief acknowledgment: “Thank you. Thank you.”
- **Release & Platform:** 256-byte MS-DOS executable, compatible with DOSBox and native FreeDOS environments. - **Accolades:** 1st place in the 256-byte competition at Riverwash 2009; Winner of the Scene.org Award for Best Technical Achievement (2009). - **Source Code & Info:** Fully commented x86 assembly source code and community feedback archived on Pouët and Scene.org.
## Mentioned DOSBox, FreeDOS, Jan Kadlec (JanRrrola), MS-DOS, Pouët, puls, Riverwash 2009, Scene.org, Scene.org Award for Best Technical Achievement
## Video description My 256-byte MS-DOS intro that won the 256-byte competition at Riverwash 2009 and got the scene.org Best technical achievement award in that year. You can run it in DosBOX or on a PC booted into FreeDOS. Download: https://files.scene.org/view/parties/2009/riverwash09/i256/puls.zip. Commented source code (x86 assembly): https://www.pouet.net/prod_nfo.php?which=53816 See the demoscene response at http://pouet.net/prod.php?which=53816.
[Source](https://www.youtube.com/watch?v=R35UuntQQF8)