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Gemtos is over and here is a summary!

[ Atariscne.org - News ] Gemtos is over and here is a summary!

lobstregated at Scene.org on 2026-05-09

GCC for asm Experts (and C/C++ Intermediates) - Part 6

[ Atariscne.org - News ] GCC for asm Experts (and C/C++ Intermediates) - Part 6

← Fixing Post-Increment Addressing

DBRA and the Cost Model Balancing Act

When you write assembly for the m68k, dbra is just there. Put your count in a data register, end your loop with dbra dN,.label. Four bytes, twelve cycles per iteration on 68000, no flag dance, no comparison. Your loops naturally form around the instruction.

C/C++ does not work that way. The natural loop in C is for (i = 0; i < N; i++) or while (cond). Neither says "count down and exit when you wrap", well, while can. But a counted-up loop with an unsigned comparison is what the language naturally models, and that is what GIMPLE mostly produces. Turning that into a dbra is a backend job, and requires carefully written code. And GCC, for reasons we will get to, mostly stopped doing it for m68k.

lobstregated at Scene.org on 2026-05-08

Confirm your consent for the Art of Coding demoscene UNESCO nomination

[ Wanted! ] Confirm your consent for the Art of Coding demoscene UNESCO nomination

Art of Coding is working to get the demoscene recognized as UNESCO intangible cultural heritage. Norway is leading the multinational nomination, Germany is confirmed, and the nomination deadline is 1 June 2026. You can still sign after that date to show community consent and support. https://forms.gle/FzwVd7ovndev3VrP9 Take 1 minute. Yoghurt
lobstregated at Scene.org on 2026-05-08

Demoscene UNESCO nomination — Norway leads, sign here

Norway is leading a multinational UNESCO ICH-02 nomination for the demoscene, with Germany confirmed as co-submitting State Party.

As part of the documentation of community participation and free, prior and informed consent, practitioners are invited to complete the consent form below.Deadline: 1 June 2026.

Link: https://forms.gle/FzwVd7ovndev3VrP9

Yoghurt

[Submitted by Yoghurt]

lobstregated at Scene.org on 2026-05-08

Chipo Django 3 is now available in its final version

[ Atariscne.org - News ] Chipo Django 3 is now available in its final version

Insane writes:

Chipo Django 3 is now available in its final version.

There were reports of a buggy replay, so I took apart the Lance replayer once again and (hopefully) fixed every known issue. This new version now runs the latest version of the ProTracker Replay 2.3f by 8bitbubsy using the Lance Paula emulation. (Both the Acorn and Amiga side also had some different bugs fixed)

The replayer source code is available here.

And special Thanks to evil for recording both the party and final version for youtube!

🔗 Chip Django 3 on Demozoo
🔗 Chip Django 3 on Pouet
🔗 Fixed Protracker 2.3f replayer on Github

lobstregated at Scene.org on 2026-05-07
some stats -24h
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4420 boards + 1
27429 users + 2
1027198 comments + 38
259 users seen in the last 24h  
progress to the youtube singularity: 32.41%  

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