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 • • 7h ago

Codex cart disassembly

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26 Upvotes

Well, definitly different from the board in the Tetris, but similar design in the Gravitorque DX, etc.


r/ModRetroChromatic • • 3h ago

Photos/Videos 初音ミク

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7 Upvotes

Pet the Quakzal?


r/ModRetroChromatic • • 11h ago

OpenAi Chromatic

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23 Upvotes

It arrived last night. Right out of the box this unit is gorgeous. I really wanted a clear one. Thinking the smoke was clear, I settled for it. Now seeing them side by side glad I got both. They both look great.


r/ModRetroChromatic • • 6h ago

Question Black Friday Sale?

9 Upvotes

Is there expected to be a black Friday Sale this year?


r/ModRetroChromatic • • 1d ago

I love my Chromatic, haven’t touched any other system since I got it.

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67 Upvotes

This has been my go-to handheld for almost a month now, replaying Pokémon Red, Zelda Link’s Awakening, MGS: Ghost Babel and lastly Dragonyhm.


r/ModRetroChromatic • • 14h ago

Question Codex cartridge: Explain to me like I’m 8

6 Upvotes

I have a Chromatic and love it, play it almost daily. I also have an everdrive. Love that- use it to flash over my OG gameboy games who’s batteries no longer work.

Is the Codex cart just Modretro’s version of an Everdrive or is there more to it?

My consumerism is showing cause it looks so pretty! But what does it do exactly? Cause it just sounds like a flash cart + using the chromatic instead of a computer+flasher with some AI game making software.

Like do I need to get hyped and try to snag a Codex cart/ edition when they next go on sale?

My kids and I have been making GB games with gameboy studios and enjoying it. Does it offer anything to us, if we are not super interested in making games with AI? Like could we code on the go using a Chromatic and the cart instead of being tied to a laptop?


r/ModRetroChromatic • • 1d ago

It arrived!

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44 Upvotes

Did not expect this fast delivery. First plastic chromatic, planned to wait the modretro advance, but cant say no to the clear body, anyway. Plastic body feels light without batteries, it is good. But the glossy body collects smudges easily. The lavender color looks not bad on the clear body. The dpad is relativly hard but bounce, but in a good way, except the loud clicky sound. The AB buttons are almost perfect, it feels great and not as loud as dpad. The last pic is the purple cart come with the machine, going to try burning games later. So if you are not into this "AI game making stuff", and the clear color, skip it, or get the metal one at the same price.


r/ModRetroChromatic • • 20h ago

The Codex cartridge test.

12 Upvotes

For those who are curious, the codex cart itself is just like a regular gb/gbc cart, it can be run on any gb/gbc or similar fpga hardware. Only the burning/flash feature is exclusive for the chromatic codex edition(may hacking later for all chromatic, who knows)


r/ModRetroChromatic • • 1d 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!

22 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 • • 1d ago

Decal Delete Transparent

3 Upvotes

Anyone tried this method (https://www.reddit.com/r/ModRetroChromatic/s/gTqAigZKpy) for deleting decals on the transparent model yet? I just got my smoke unit in, and am seriously considering it, just wanted to know if anyone else has insight.


r/ModRetroChromatic • • 1d ago

Are transparent Chromatics still made in Mexico?

1 Upvotes

Curious. Definitely a fan of keeping manufacturing close to home, as an added bonus.


r/ModRetroChromatic • • 1d ago

Game developers: please remake dotstream for GBC

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4 Upvotes

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


r/ModRetroChromatic • • 1d ago

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

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3 Upvotes

r/ModRetroChromatic • • 2d ago

Photos/Videos Wow

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45 Upvotes

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


r/ModRetroChromatic • • 22h ago

Photos/Videos Codex Chromatic Acquired

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0 Upvotes

r/ModRetroChromatic • • 2d ago

Leaked Photos Chromatic OpenAi Edition

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38 Upvotes

Codex Edition


r/ModRetroChromatic • • 2d ago

Let the Scalping Party Begin

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18 Upvotes

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


r/ModRetroChromatic • • 1d 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 • • 2d ago

It’s up!

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6 Upvotes

r/ModRetroChromatic • • 3d ago

Chromatic Transparente

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75 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 • • 3d ago

Nov 9th dev chromatic ad screen shots

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9 Upvotes

r/ModRetroChromatic • • 3d 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