#CosAm
Built two COSAM Neptune boards! Sega 32X and Genesis both on one PCB! 😌
June 2, 2025 at 2:00 AM
January 10, 2025 at 2:12 PM
I don’t yet know if this is my new bestie or hilarious campus nemesis.

(But seriously, this is cool and I want my next university headshots here)
COSAM lecturer's dice design solves board gaming's most surprisingly complex problem — who goes first?
A simple question about who goes first turned into a 15-year mathematical puzzle. Auburn COSAM senior lecturer Eric Harshbarger and researchers around the world developed a set of dice that eliminates...
wire.auburn.edu
August 17, 2026 at 9:46 PM
Photos from @jake74.bsky.social showing off the finished product and @retrofied.uk's fantastic labels!
January 13, 2025 at 12:36 AM
Repost with something you own that most people don’t.

Sega Neptune.

Built by @aergan.com board by @cosam-the-great.bsky.social shell by dvizix
May 3, 2025 at 8:45 AM
Here's an interview with @cosam-the-great.bsky.social, the dev who created the Neptune and other awesome retro motherboards. As always, these long-form chats are available everywhere - Just search your favorite app for "RetroRGB Cosam", or go to the main link here: www.retrorgb.com/interview-wi...
September 29, 2025 at 11:21 AM
Finally, @cosam-the-great.bsky.social has a Ko-Fi - if you are thinking of building your own using his works, please consider sending a kofi his way. Also helps support all the other R&D, tomfoolery and other completely batshit antics he has ongoing that makes the internet wonderous:
ko-fi.com/cosam
Support Cosam on Ko-fi! ❤️. ko-fi.com/cosam
Support Cosam On Ko-fi. Ko-fi lets you support the people and causes you love with small donations
ko-fi.com
January 13, 2025 at 12:46 AM
It’s alive!!

Thanks @cosam-the-great.bsky.social for the awesome project. Definitely the hardest project I’ve ever attempted.
April 4, 2025 at 11:37 PM
Might adjust the apron length before making the waistband. This will be my last bit of WIP until I return from CosAm next week
June 18, 2025 at 5:56 PM
Another top notch video from @machonachomedia.bsky.social showing far better than I could what it takes to build your own Sega Neptune youtu.be/PcP60-0NIEw?...
Someone Did What SEGA Didn't, Build A REAL Neptune | COSAM
YouTube video by Macho Nacho Productions
youtu.be
March 14, 2025 at 9:09 PM
This took forever, and have gone through a great deal of my spares trying to find a working screen, but it’s finally verified..

@cosam-the-great.bsky.social’s PC Engine GT repro board works! ❤️
May 3, 2025 at 11:53 AM
Here's this week's retrorgbweeklyroundup! Search any video or podcast app for RetroRGB Weekly, or head to the main link: retrorgb.com/week481.html
.
#retrorgb #classicgaming #retrogaming #LaserActive #snesrumble #dreamcast #240hz #pcengine #retrotink4k #cosam #PS3
October 1, 2025 at 10:57 AM
Cosam is making promising progress with his SNES PlayStation recreation project.

Meanwhile, Goldlocke7 updated our Super Disc homebrew Super Boss Gaiden from 2016 to increase compatibility, based on more recent findings about the hardware + BIOS.

Download it here: superbossgaiden.superfamicom.org
February 23, 2025 at 10:41 AM
Was really happy to be able to hook Matt up with a Cosam Neptune build!! Been having a lot of fun building these. 🙂
I knew I had to have a Cosam Neptune to play 32X and Genesis games, but I needed help transfering the custom chips.

So I called in a pro! @ohpoorpup.bsky.social nailed it and apprised me throughout. Beautiful! Check out that subtle cartridge slot shave on my Model 2 case to fit 32X carts!
June 24, 2025 at 6:16 AM
We can't have graph theory conferences anymore, because of woke. www.auburn.edu/cosam/depart...
34th Cumberland Conference on Combinatorics, Graph Theory, and Computing
www.auburn.edu
May 7, 2025 at 10:09 PM
🗡️🗡️🗡️

Thinking about remaking Vax for cosam 2025, for reasons. I originally made it in 2019 so the EVA foam armor is a little long in the tooth these days.

Photos - @viciousfrockery.bsky.social
Cosplay made by me

#CriticalRole #Vaxildan #cosplay
November 16, 2024 at 1:30 AM
Sorprendido me encuentro, que cosam ás fea Ludomon :(
April 2, 2025 at 9:48 AM
Which brings me to the final part of the future plans...

A modern PCB is being created currently, based on the groundwork laid down by the amazing @cosam-the-great.bsky.social and @zaxour.bsky.social
April 11, 2025 at 8:42 AM
Finally, built a SEGA Neptune & it's working!

Huge thanks to Cosam and #BoardFolk.

I need to sleep for like 1,000 years now.
July 13, 2024 at 10:18 PM
Metrô cosam, mas o cortem.

#palindromo
December 17, 2024 at 12:21 AM
My @cosam-the-great.bsky.social Neptune board up and running! Shoutouts to the @retrorgb.bsky.social and @dubesinhower.bsky.social Discords for some troubleshooting at the end. By far the hardest project I've taken on. It's a shame tariffs have put a Neptune shell out of the budget :(
August 7, 2025 at 2:27 AM
It never ceases to amaze me what @cosam-the-great.bsky.social can do whether its the #Sega Neptune or attempting to recreate the #SNES CD from basically scratch! So let's take a look at 2025's most insane "mod project" IMO youtu.be/0SUB5bnxcrk #gaming #gamingnews #gaming_news
November 16, 2025 at 10:00 PM
Some SEGA / Cosam #Neptune captures
September 19, 2024 at 8:28 PM
I knew I had to have a Cosam Neptune to play 32X and Genesis games, but I needed help transfering the custom chips.

So I called in a pro! @ohpoorpup.bsky.social nailed it and apprised me throughout. Beautiful! Check out that subtle cartridge slot shave on my Model 2 case to fit 32X carts!
June 24, 2025 at 6:05 AM
Thank you @cosam-the-great.bsky.social ! It’s definitely one of the coolest projects out there!
March 15, 2025 at 2:01 PM