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No-CPU Challenge by Demostue Allst★rs
[nfo]
screenshot added by Blueberry on 2025-08-17 02:39:00
platform :
type :
release date : august 2025
release party : Evoke 2025
compo : alternative demo
ranked : 1st
invitation for : Gerp 2026
  • 37
  • 0
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popularity : 56%
 56%
  • 1.00
alltime top: #67054
added on the 2025-08-17 02:38:52 by Blueberry Blueberry

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fresh and slick!
rulez added on the 2025-08-17 05:59:57 by teo teo
Interesting new challenge!
Nice to see some oldskool Danish sceners return in this demo aswell!
Looking forward who will accept this challenge at Gerp 2026 or otherwise!
Nice invite! Nice production!
rulez added on the 2025-08-17 08:33:06 by magic magic
Donnerwetter
rulez added on the 2025-08-17 08:57:46 by Toddi Toddi
Donnerwetter^2
rulez added on the 2025-08-17 10:03:33 by Depeche Depeche
Really cool demo! Also looking forward to seeing the compo at Gerp 2026
rulez added on the 2025-08-17 10:51:32 by FairArt FairArt
Donnerwetter^3
rulez added on the 2025-08-17 12:03:23 by sensenstahl sensenstahl
It's now safe turn your 680x0 off. Copper+Blitter sorcery
rulez added on the 2025-08-17 12:16:27 by Z3k Z3k
amazing :)
rulez added on the 2025-08-17 12:32:22 by NR4 NR4
As a 680x0 junkie. I'm offended. Now ignore me and proceed with the challenge.
rulez added on the 2025-08-17 14:02:55 by Charlie Charlie
Great stuff!

Funnily, I also "invented" the nocpu tech independently some time ago. See https://infosec.exchange/@harrysintonen/112627238742582618 for writeup. Of course my hack is far from actual "real code", it only does simple game of life and implements simple cycling loops by performing SMC on the copperlist.
rulez added on the 2025-08-17 14:12:29 by Piru Piru
Rules like Interceptor :D
rulez added on the 2025-08-17 14:21:28 by leGend leGend
How is it possible to write a computer program that doesn't use the CPU?

The demo itself is very well designed and also features good graphics.
rulez added on the 2025-08-17 14:50:22 by Adok Adok
I just love this!
rulez added on the 2025-08-17 15:01:06 by nerve nerve
Whole package is so good
added on the 2025-08-17 15:14:27 by leGend leGend
Super cool invitation and great idea.
rulez added on the 2025-08-17 15:29:42 by ham ham
🙃👍
rulez added on the 2025-08-17 15:55:02 by p01 p01
had no idea you could do all that without using any CPU cycles
rulez added on the 2025-08-17 16:05:28 by psenough psenough
Cool tech and awesome presentation!
rulez added on the 2025-08-17 16:14:21 by Olympian Olympian
Fantastic! Really looking forward to whatever is going to be the fallout from this.
rulez added on the 2025-08-17 16:20:04 by las las
Good work, guys!
It's a crazy idea, but maybe it proves that Amiga can run Atari-level demos without using the CPU?
If so, I propose that CPU-free Amiga demos can compete in Atari compos :D (Just kidding, don't get mad at me, Atari fans! xD)
rulez added on the 2025-08-17 17:04:52 by Rhino/BG Rhino/BG
Finally I can watch demos without slowing down my Bitcoin mining.
rulez added on the 2025-08-17 17:17:07 by Sesse Sesse
Love it! Insane to have the Copper play Paula like that. Blows my mind :)
rulez added on the 2025-08-17 17:36:34 by Slumgud Slumgud
Awesome pixel work, wicked soundtrack, crazy tech... but most of all Blueberry just nails the presentation perfectly.
rulez added on the 2025-08-17 17:53:36 by djh0ffman djh0ffman
Fucking sick, even moreso knowing a bit of how it works technically!
rulez added on the 2025-08-17 18:13:13 by wrighter wrighter
Would be rly interesting to see writeup
added on the 2025-08-17 18:14:26 by wrighter wrighter
WTAF?! This is amazing!
rulez added on the 2025-08-17 18:24:50 by jdb78 jdb78
Such fresh graphics!
Highlight of the evening for me.
Mooooore !!!!
rulez added on the 2025-08-17 18:41:31 by Steffest Steffest
this is what demoscene is about - ultimate coder porn wrapped in an amazing complete package! needless to say that tune is also on another level on its own!
rulez added on the 2025-08-17 19:04:05 by bonefish bonefish
About to be expected, yet still hits with astonishing force.
On spot execution on all levels.

Let the revolution begin!
rulez added on the 2025-08-17 19:34:03 by FAZ FAZ
Neat
rulez added on the 2025-08-17 19:36:55 by bitl bitl
Didn’t expect such an amazing demo for a ”informative” prod like this :)
rulez added on the 2025-08-17 19:49:25 by malmix malmix
Fucking brilliant! (pardon my French... oh what the hell)
rulez added on the 2025-08-17 20:14:07 by Foebane72 Foebane72
Next level CPU-less sorcery!
rulez added on the 2025-08-17 20:50:19 by Nupo Nupo
Wonderful to see this making it to the public (and winning too). And even better than the various previews of code, graphics and sound, I've been impressed to witness at Demostue - well done, friends.
rulez added on the 2025-08-17 20:57:06 by curt_cool curt_cool
Quiet amazing, it's a full fledged solid demo despite not using the cpu.
rulez added on the 2025-08-17 21:48:10 by Clarence Clarence
Potzblitz, this was mindblowing!
rulez added on the 2025-08-17 22:14:46 by BSC BSC
Rocks!
rulez added on the 2025-08-17 23:24:48 by warp warp
One of you guys need to make a video explaining what "pure copper, no cpu" means. As while yes I find it really cool and still would rulez it even if it was a "normal" demo, I don't know exactly what about this makes it more than a normal demo.
rulez added on the 2025-08-18 00:15:52 by minebrandon minebrandon
Quote:
One of you guys need to make a video explaining what "pure copper, no cpu" means. As while yes I find it really cool and still would rulez it even if it was a "normal" demo, I don't know exactly what about this makes it more than a normal demo.


Read this now imagine that runs your entire demo.
added on the 2025-08-18 00:31:11 by djh0ffman djh0ffman
Nice!
rulez added on the 2025-08-18 00:59:31 by supah supah

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