Atarimax Ultimate SD Multi-Cart and Backbit Pro


AtariMax CartridgeThe 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.

(For purchasing information - Click here)   -  (Firmware support - Click here)




Back Bit Pro CartridgeThe BackBit Pro Cartridge is an SD card based multi-cart for your Colecovision game system.
NOTE: This cart requires the purchase of the Colecovision/Adam adapter (Sold separately)



  • All standard 32K or less ROM images.

  • MEGA-CART Bank-switched ROM images up to 512KB (Mario Bros, Pac-Man Collection, etc)



(For purchasing information - Click here)


Please note that all legacy ROMs within the archive are from the CV ROM Update project!

Complete ROM archive of Colecovision Addict.com for the AtariMAX multicart.

CLICK HERE TO DOWNLOAD (5.02 MB)  (Last Updated January 11, 2024.)

It contains 316 ROMs! Please read the "readme.txt" inside the archive.

MD5 Hash: da3219d964f2e67725f91613a0eeb968

Last 10 rom files added
Space Shuttle: A Journey Into Space - January, 2024
Utopia - January, 2024
Space Shuttle: A Journey Into Space - January, 2024
Vectorollerpede - September, 2023
Asteroids - December, 2022
Star Castle - December, 2022
Moon Patrol - April, 2022
Turmoil 2022 - March, 2022
Crazy Climber Redux - March, 2022
Neuras - February, 2022