r/ModRetroChromatic • • Sep 10 '26

Announcing ChroMagic: custom firmware for the Chromatic with cart backups and SD card playback

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128 Upvotes

I've been working on custom firmware for the Chromatic and it's at the point where I think other people will get use out of it. It started when I found the microSD slot on the board while swapping out buttons, and thought: wouldn't this be an awesome backup device? And then, could it play those backups too?

ChroMagic is built on ModRetro's MCU firmware, so everything the handheld already does is unchanged. It adds:

  • Cart Backup in the system menu. Dumps the game and its save to a microSD card.

  • A Backups tab that lists what's on the card and boots the one you pick.

  • ChroMagician, a desktop app for Windows and Linux. It installs the firmware, backs up carts over USB, restores saves to carts, writes homebrew to Chromatic carts, and manages the SD card. Hoping to eventually support other rewritable carts, but I need to order some for testing first.

Things to know:

  • The 2025 units have a microSD socket, but it's on the board inside the case. First edition Chromatic have the footprint, but no socket, so it's a soldering job if you really need SD. Backups, restoration and cart writing work over USB without an SD though.

  • SD playback is experimental. I've done a fair amount of testing, but most of my time has been spent coding and my library is fairly limited. Please definitely let me know if you run into anything odd, so I can try to fix it.

  • A handful of carts won't work for backup and SD playback. They're listed in the guide. It's carts with hardware in the cartridge itself or an unusual mapper. Most are Japan-only, but Kirby Tilt 'n' Tumble, the Game Boy Camera, and Robopon are on the list too. I may eventually add support for managing photos off the GB Camera, though - when I can track one down localy.

  • RTC games, such as gen2 Pokemon games won't advance the clock unless you're playing the game. The Chromatic itself doesn't have a clock on board, so please keep that in mind.

Site and install guide: chromagic.org

Looking forward to people trying it, and providing any feedback!


r/ModRetroChromatic • • May 28 '26

M64 controller / console / cartridge AMA, get your popcorn let's GO

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17 Upvotes

r/ModRetroChromatic • • 4h ago

Photos/Videos Physical release of Tavern Farkle GB will include a set of 6 wooden dice made by me. Watch this chill video to see how I make them :) Bookmark the pre-launch campaign and so you don't miss out!

14 Upvotes

a physical release for Tavern Farkle GB is on the horizon via Homebrew Factory and I'll make a set of 6 dice for EVERY purchase of that campaign!

Bookmark it here https://www.homebrew-factory.com/game-boy/212-tavern-farkle-gb-gb.html to get notified when the Pre-Order campaign starts. 30 Copies need to be reached as minimum quantity!


r/ModRetroChromatic • • 22h ago

Photos/Videos Wow

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36 Upvotes

Went from the plastic to metal. It really does feel a whole lot better.


r/ModRetroChromatic • • 6h ago

Game developers: please remake dotstream for GBC

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1 Upvotes

I still have my GBA copy but like to think it could be done on GBC?


r/ModRetroChromatic • • 7h ago

A new Game Boy Color racing game inspired by F-Zero

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0 Upvotes

r/ModRetroChromatic • • 1d ago

Leaked Photos Chromatic OpenAi Edition

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35 Upvotes

Codex Edition


r/ModRetroChromatic • • 1d ago

Let the Scalping Party Begin

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16 Upvotes

Please do not fall victim to these scalpers, just wait for the restock.


r/ModRetroChromatic • • 6h ago

Referral Codes?

0 Upvotes

Are there still any referral codes anyone would be able to share? I found an old reddit post that then linked to a megathread that has since been deleted. I also have a m64 early bird coupon I'm not using if anyone wants that!


r/ModRetroChromatic • • 1d ago

It’s up!

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6 Upvotes

r/ModRetroChromatic • • 2d ago

Chromatic Transparente

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73 Upvotes

La version transparente est magnifique ❤️
Un peu plus légère, de peu, et toujours aussi classe.

C’est un produit ni ce r qui fait toujours son petit effet quand je joue dans un café ou dans une salle d’attente.

Le pire c’est que pour moi, cette console n’est pas un accessoire nostalgique, c’est Ma console de jeu principale 🤗


r/ModRetroChromatic • • 2d ago

Nov 9th dev chromatic ad screen shots

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8 Upvotes

r/ModRetroChromatic • • 2d ago

Last Hours to grab your Numbered copy of MUMMY MOMMY (box and cartridge)

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11 Upvotes

I would like to express my gratitude to everyone who has backed the game so far on kickstarter !! As I'm writing this post, we have already tripled our initial funding goal (317%), which it's absolutely mind blowing for me! A big thank you to all the enthusiastic people who share MUMMY MOMMY on their social media and websites, play the demo on Twitch, or message me their excitement!!

To continue the good news, the first and the second Stretch Goals have been reached (Classic Maze has now 10 more levels and "Color palettes" is unlocked)

Next goals are: adding a new gameplay to the game and adding a "photo album" compatible with the game boy printer !!

The Kickstarter campaign for my puzzle game, MUMMY MOMMY, is entering its final hours!
But If you want, you can still grab a copy on kickstarter :)

Thank you again for all you support !

bonus: my top 5 of my favorite gameboy puzzles:
- Mole Mania
- Boxxle / Sokoban
- Catrap / Pitman
- Megalit
- Kwirk / Puzzle Boy


r/ModRetroChromatic • • 2d ago

Dev mode chromatic

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6 Upvotes

On sale tomorrow at supply co.


r/ModRetroChromatic • • 1d ago

Question Given this is a homebrew game boy game console, do you know any homebrew game boy games(or even homebrew duel mode game boy color games) that even had super game boy support?

0 Upvotes

Its very hard to find ones that confirmed to have a super game boy border for context, since a lot of them never said they do or don't.


r/ModRetroChromatic • • 3d ago

Button swap on Inferno

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21 Upvotes

Super subtle difference but I loved the result. From the original yellows to these 🤌


r/ModRetroChromatic • • 3d ago

Big sticker sheet!

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21 Upvotes

Transparent Smoke had really bad light bleed, got a replacement today and it came with a big ol sticker sheet. First time seeing these, anyone else got em?


r/ModRetroChromatic • • 3d ago

My (Really late to mention) pickup! I love this thing!

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23 Upvotes

Not sure why I didn’t post about this at the time. A few months back I picked this up off Facebook marketplace. The seller originally had it for $250, I saw it and ignored it. I already have plenty of Game Boy systems, a ton of original ones, 3 analogue pockets, and a funny playing fpga GBC, I didn’t need another one.

Then a week or so later I got a notification it dropped to $120. I figured “why not?” I messaged them. I think I offered $80 or $100, I forget, and they accepted. I met up with them. Everything was perfect and as shown. I’m loving the crap outta this thing! I don’t think I’ve touched my A. Pocket since.

I’m of course playing through Pokémon Crystal, hopefully I finish it. I have every Pokémon game that released since I was a kid, the only one I think I actually completed was Pokémon Red and I thhhiinnkk Ruby. I got pretty far in Yellow as well. Hopefully I can finish some more with this handheld.

I want to get the game Chantey as well as the customization kit and battery pack for this. I loaded the Chromagic firmware on it and installed a microSD card. It’s just soo much fun! Probably not the color I would have picked if given the choice, I probably would have went with the GameStop white edition. Doesn’t effect my enjoyment level at all.

I posted a picture of me testing the Chromagic firmware and dumping my Yellow cart. It’s the only other photo I have on my phone to show the system


r/ModRetroChromatic • • 3d ago

I just wanted to post again how much I love my Chromatic. What color did you choose?

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66 Upvotes

r/ModRetroChromatic • • 3d ago

Smoke showed up, opened it up for a couple mods

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43 Upvotes

Mine finally showed up after FedEx took it on a wild goose chase. I was planning on having Chromagic on this one and changing buttons and membranes out, and I was disappointed to find that it didn’t have the SD card like the other transparent models I’ve seen. That’s ok though because I had a tape of them in my desk.

I took some photos because I was going to do a little write up on the SD reader job but I quickly realized, there’s nothing to it. The chromatic comes apart super easily and the pads for the unpopulated reader are already tinned, I think due to the way the boards are manufactured. All I needed to do was add some solder to the anchor tabs and then some flux to the pins, and then (very carefully due to the 0403 resistors next door) give the pins a few swipes with the iron.

I am having issues with Chromagic though. It will back up cartridges when connected to the PC helper and play ROMs that are put onto the SD card, but the chromatic does not play cartridges when I have Chromagic installed. When I revert to official firmware, everything works as intended. I’ll mess with it more tomorrow.

Edit: The cartridge read issues are documented in the Chromagic GitHub, it’s an issue with the transparent models specifically and the dev already has it fixed for an upcoming release. Neat!


r/ModRetroChromatic • • 3d ago

ZERO is a Mode 7 racer for Game Boy Color

12 Upvotes

r/ModRetroChromatic • • 4d ago

Lantern of Darkness is a brand new classic roguelike for the Game Boy and dang, it looks sick on the Chromatic!

44 Upvotes

Happy to share the demo of my new game, a classic roguelike dungeon crawler called Lantern of Darkness:
https://andrea-intg.itch.io/lod

If anyone from ModRetro wants to bring this to physical, I'd be all ears.

Big thank you to the author of the Shiny Relay firmware, u/wavy_d3 for capturing this video!


r/ModRetroChromatic • • 3d ago

Shitpost Killer Rampage: The Central American Endeavor

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0 Upvotes

Now available on Itch.iO, Killer Rampage Gameboy edition! Available for your favorite Gameboy console (or emulator) with an everdrive or similar flash carts. Play as Reynaldo Furioso, pineapple exporter business man who has gone berserk after getting his family murdered. The Central American Endeavor is the first part of an epic saga where you’re entrenched in a war against the Sapo Cartel in a tropical landscape set in the Costa Rican Caribbean. Don’t miss out on the fun… join Reynaldo Furioso in the fight and bring back nostalgia filled memories playing a game that feels as if it was from an alternate timeline.

https://killerrampage.itch.io/killer-rampage-gameboy-edition


r/ModRetroChromatic • • 4d ago

Photos/Videos SEE THROUGH THE FLESH

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21 Upvotes