RetroChallenge

New entry for RC 2025/10: Digicool Things Platform: Minimalist Europe Card Bus (MECB) / DREAM 6800 (6809) Project

On the final stretch of @retrochallenge 2015/10! retrochallenge.org/2025/10/on-fin…

RC2015/10 HalfTime update for @retrochallenge ! retrochallenge.org/2025/10/rc2025…

shebangs! shebangs! Louis Paul implements video mode (reminds me of Timeshock Pinball!) hackaday.io/project/204138…

decl is thoroughly documenting his Drof drof-computox.blogspot.com

Purist has an update, and is attempting to draw triangles on the R500: r500.idk.st

New Entry - Robert Price: @robertprice@mastodonapp.uk Platform: RC2014 Project :  This year, I want to interface a classic Nintendo NES / Famicom joypad from 1983 to my RC2014 computer. 📷

The N-Queens problem in VAX BASIC is enough to start tripping up Claude Code! #retrochallenge #04-oct-2025" target="_blank" rel="nofollow noopener">urbancamo.github.io/retrostuff/rc2…

Don't forget to post your updates on X and tag us either as @retrochallenge or #retrochallenge and we will re-tweet-x-whatever for you!

New entry from purist - Project :  Radeon R500 will be 20 years old as of 05 October 2025, so it now qualifies for Retro Challenge. The primary/minimal project goal is "draw a triangle on a Radeon R500 via direct memory-mapped hardware register and texture memory accesses". 📷

Louis has an update: hackaday.io/project/204138…

ACMS - October 2025 - Retrochallenge - Win cash and prizes! Rebuild a Mac SE/30! - mailchi.mp/86935c36f93f/a…

Microsoft Excel turns 40 today. This is what Excel 1.0 looked like (it was only released on Macs).

#retrochallenge I'm out of the block with my first update: urbancamo.github.io/retrostuff/rc2…

LambdaMikel: Previously, I built a graphics card for the MPF-1B. So far it has done text output and Mandelbrot fractals. For RC2025/10, I want to see a rotating 3D cube on it!

decle is first out of the block: I'll attempt to reverse engineer and document The Drof Computox, an electro-mechanical noughts and crosses machine. It seems to have been built by a hobbyist from telephone exchange parts perhaps at some point in the 1960s.

And we're back for another month of madness! If you want to be a part of RC2025/10 fill in the form for a place docs.google.com/forms/d/e/1FAI…

Can't have too much green! Or can you? Come and see my table at the Retro Computer Festival and find out (and bring sunglasses) computinghistory.org.uk/det/72253/Retr…

@wgoodf No one will ever twitter like you Dale