The Colecovision Ultimate SD cartridge is an SD card based multi-cart for your Colecovision game system.
The Ultimate SD is the most advanced cartridge ever produced for the Colecovision and includes a 50 MIPS onboard CPU, advanced upgradable hardware logic, 512KB of SRAM and 128KB of block flash.
The Ultimate SD Cartridge supports the following Colecovision ROM formats:
- All standard 32K or less ROM images.
- MEGA-CART Bank-switched ROM images up to 512KB (Mario Bros, Pac-Man Collection, etc)
- Lord of the Dungeon (Including NVRAM with automatic save to SD card!)
- New modes including the Hybrid 512KB full Read/Write 8k/8k Bank-switching mode
The bank switching logic, CPU firmware, boot flash and menu software are all 100% field upgradable by just placing new files on the SD card and turning on the system!
To read more about the capabilities of the cartridge and the menu software, please check out the documentation below the ordering page and visit the discussion forums also linked below.
Additional information
| Weight | 6 oz |
|---|

AtariMax
Atarimax is a destination for enhancing Atari and ColecoVision gaming and computing experiences. Atarimax offers hardware and software solutions designed to maximize retro systems.
The Maxflash Flash Cartridge Systems for Atari 8-bit computers allow users to create and manage multi-game cartridges with the Maxflash Studio software and USB programmer. The Ultimate SD Multi-Carts for the Atari 5200 and ColecoVision have onboard CPUs, high-speed SD card interfaces, and support a variety of ROM formats. The ColecoVision Ultimate SD Multi-Cart is the most advanced cartridge made for the system.
The APE (Atari Peripheral Emulator) allows Atari users to leverage PC resources for disk drives, modems, and printers, among other features https://www.atarimax.com/. Atarimax also offers the Happy 1050 Upgrade for the Atari 1050 Disk Drive, SIO2PC interfaces, and MyIDE-II CompactFlash Interface for the Atari XL/XE.
Atarimax is dedicated to retro gaming and computing experiences. Products are professionally produced and designed for ease of use. Visit to explore expanded possibilities for retro gaming.
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davinj2000 (verified owner) –
First of thank you for the red shell instead of black red is my favorite color. The fact that someone made an item for older system is great and it works flawlessly. Brings backs all the memories of weekends playing with my dad and sister. THANKS
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Frank Carter (verified owner) –
I’m so glad to have been given the opportunity to purchase this device. I was given updates of the process up to the point to where it was shipped. As far as the device itself is concerned, it is just superb. Allowing me to finally play the one console that was out of reach for me as a youngster. Works great out of the box with no issues.
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