The other day, a friend of mine mentioned that her son had dug out her old Nintendo 64 and was having a great time playing retro games. She got a real kick out of it, since that was her childhood console. I suggested she look into getting a flash cartridge to expand their game library, and one affordable option I came across is the SummerCart 64. It’s priced around $40, at least for now, before new tariffs kick in.
You can check it out in my latest retro review.
Setting it up was straightforward. I put some games on a SD card along with a menu file (instructions are on the project’s homepage), inserted the cartridge and booted up a game on the original N64 hardware with a couple of button presses.
The cartridge makes it very easy to breathe new life into the old hardware. One particularly exciting feature is its ability to emulate the 64DD disk system, a Japan-only add-on for the Nintendo 64. It opens up access to a handful of rare games and offers a glimpse at what might have been had the add-on been more successful outside of Japan.
I picked mine up from AliExpress for $40.84, but it’s important to note that this is an open-source hardware project. There’s no official manufacturer, and quality can vary between units. It’s a buyer-beware situation. Additionally, with tariffs set to kick in starting May 2025, anyone ordering from China might have to pay more than item’s value in new import taxes.
Those who want to build their own can find schematics and parts lists on the SummerCart 64 website. It’s worth considering a donation to the developers if you find value in the project, since they don’t receive royalties from commercial sales.
The cartridge I received came fully assembled with a pre-installed CR2032 battery, which maintains the real-time clock and backs up save data. Games are stored on an SD card that plugs into the side of the cart, and ROMs that work in emulators are compatible here too. Save games will backup to the SD card automatically. There’s also a USB-C port, mainly used for firmware updates, though my unit arrived with the latest firmware already installed.
Loading a game involves two button presses, and there’s a useful display showing compatibility notes, such as whether a game requires the N64’s expansion pack or a controller memory pack. It’s worth mentioning that save states and GameShark cheat codes aren’t supported. If those features are important, an emulator might be a better fit.
What really piqued my interest was the support for the 64DD system. Even without the original hardware, the SummerCart allowed me to boot up Japan-only releases like “Japan Pro Golf Tour 64” and explore community translated titles like the F-Zero X Expansion Kit. The F-Zero expansion added track and vehicle editors along with new race cups that were previously locked away behind rare and expensive hardware. There’s a great community keeping the DD system alive over at 64dd.org.
Firmware updates for the SummerCart are handled through a simple command-line tool called SC64Deployer, available for Windows, macOS, and Linux. Updating the firmware was quick, and the real-time clock could be synced to my computer’s clock with that tool as well. The Deployer app also enables a number of developer functions that allow for bug testing on the original N64 hardware.
Over the past few days, I’ve had a lot of fun exploring games and expansion content I never had access to when the Nintendo 64 was new. Between homebrew games, 64DD titles, and the ability to easily back up save files, this little cartridge breathes a surprising amount of new life into aging hardware for a very affordable price (tariffs notwithstanding).
Part of my excitement also stems from having Analog’s upcoming FPGA-based Nintendo 64 console on order. I’m looking forward to seeing how the SummerCart performs on that system when it arrives.
Disclosure: I paid for the cartridge with my own funds.