BackBit Pro Cartridge

(5 customer reviews)

$129.00 USD

The BackBit Pro cartridge allows you to get the best use out of your vintage hardware. Individual adapters expand functionality to multiple devices. One adapter is included, and more adapters are available to purchase separately.

Watch my YouTube video series Evie’s Revue or visit the BackBit Forum for more details.



The BackBit Pro Cartridge is a universal instant loading cartridge capable of interfacing with multiple vintage computers via system-specific adapters, including:

  • Atari XL/XE
  • Commodore 64 (incl. C128, C64C, SX64, C64GS, PAL & NTSC variants)
  • Commodore 264 Series (C16/+4)
  • Commodore VIC 20/VC20
  • Sinclair ZX81 / Timex Sinclair 1000 (and 1500)
  • More systems are planned to be supported in the near future!

Compared to other cartridges which only support a single system, BackBit Pro offers way more value!

Features common to all systems:

  • Just plug and play! All you have to do is insert the cartridge and adapter, and a MicroSD card full of programs (SD card not included, but inquire at BackBit Forum for content suggestion);
  • Upgradeable via MicroSD card (not included). Just place the upgrade file on the card and updating is instant & secure;
  • Easy to use menu system can be navigated via joystick or keyboard. Unified interface is common to all hardware;
  • BackButton™ allows for easy navigation back to menu interface;
  • Loading is always instant. No need to take a coffee break while your program is loading;
  • Built-in versioning system preserves your original files;
  • Supports cartridge images up to 1MB in size;
  • Real-time-clock remembers date & time even after shutoff. Useful when creating new files or versions;
  • One-button diagnostic mode helps you identify system faults;
  • Sturdy 3D printed ABS case.

Features specific to Atari XL/XE:

  • Supports BIN/ROM format, including XEGS and Bounty Bob;
  • Planned support for other formats, such as XEX (based on user demand);
  • Optional reset pin can be wired into your machine to facilitate BackButton™ usage & single button reset to menu.

Features common to all Commodore machines:

  • Supports CRT,PRG,P00,T64,D64,D71,D80,D81,D82 file formats;
  • Supports virtual 1541/1571/1581 reading & writing of PRG/SEQ/REL/USR files via KERNAL vectors;
  • “Burn & Rip” features allows you to transfer files to or from physical floppy disks.

Features specific to Commodore 64/128:

  • 100% compatible with EasyFlash, Magic Desk, and Ocean cartridge images (among others);
  • Works in all 3 modes on Commodore 128, including CP/M;
  • Built-in SID player and Koala viewer (multicolor Koala only);
  • Built-in freezer to save program state (C64 prg files only);
  • KERNAL override if you have a PLAster chip (C64 longboard only);
  • Note that if you have a 326298 board (original rev C64 breadbin), it will require a reset fix.

Features specific to Commodore VIC 20:

  • Supports all known cartridge ROMs;
  • Up to 35K selectable RAM expansion.

Features specific to Sinclair ZX81 / Timex Sinclair 1000 (and 1500):

  • Built-in 16KB RAM expansion.


Additional information

Weight 4 oz
Case Option

Red, Black

Included Adapter

Atari XL/XE, Commodore 64/128, Commodore 16/+4, Commodore VIC 20, Sinclair ZX81 / Timex 1000

5 reviews for BackBit Pro Cartridge

  1. Ben S

    The BackBit Cartridge for the Commodore 64 is a must-have item for any Commodore enthusiast. The BackBit supports thousands of games and programs. They can be easily loaded from the BackBit’s built-in menu system and launched, with most games loading in mere seconds.

    The BackBit also includes a reset button that can return the user to the menu system at any point, allowing you to resume where you left off.

    The cartridge supports almost all major image types (D64, D81, CRT, P00, PRG, etc), including its own proprietary format (BBT). Recent firmware upgrades have paved the way toward supporting more multidisk games (several multidisk games are already in the BackBit Collection available on the BackBit forums).

    You won’t find a better device for easily running software on the C64 using nothing more than a MicroSD card.

  2. Jeremy

    Awesome cart that makes the C64 Fast and Fun to use, it’s easy to set up and has great support compared with other options.

  3. Jari K

    Amazing device! Easy to use, superbly fast and reasonably compatible, and the constant firmware upgrades and support make BackBit an absolute joy and thrill to keep using. Also, with adapters around to make BackBit usable on increasingly varied machines, it’s an absolute must-have in any serious retrogamer’s collection of new gizmos. Sure, it doesn’t run cassette image files (TAP), but then that’s not the point of it. 😉

  4. Calen Palazzolo (verified owner)

    The Backbit Cart is frickin AWESOME!! It loads instantaneously and has more than met my expectations! So much faster than the other device I have. I ordered it on Sunday and it came a day early which was a nice surprise. I remember playing the C64 as a child in elementary school and remember the awful load times. There is no such thing as load times when it comes to this wonderful device. I can’t wait to play these games with my kids. Thank you Evie for making such a wonderful product.

  5. Darth Florus

    I’m a freaky of C128 and the Backbit have a excellent support of it. When a program don’t work forum support is awesome, in a days the program works on!. The “program api” is good enough to manage features of the backbit cartridge. The extended file can be used as a expanded memory or memory disk as you can program for use it. Is the first cartridge that allows me to use 4 CP/M disk images at once thanks of the custom BBT file format. With it, I use CP/M as never I used in all my live as C128 user. A must have cartridge for a C128 user!

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