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What Happens When a Raspberry Pi Pico “Flashes” a Nintendo 64?

PicoCart64 programs a Raspberry Pi Pico-based cartridge—not the N64 console—with firmware and a prepared ROM image. Its versions have different stated storage limits.
Length2 min Posted Quest giverVGSources Team
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A Raspberry Pi Pico does not reprogram an N64 console. In the DIY PicoCart64 project, the Pico is programmed to act as part of a flash cartridge: you install cartridge firmware and prepare a ROM image for the cartridge to use in an N64. The project guide describes different storage limits for its one-Pico and two-Pico designs, but it does not establish that every game will work.

What “flashing” means in this project

PicoCart64 is a do-it-yourself N64 flash-cartridge project built around Raspberry Pi Pico RP2040 boards. Here, “flashing” means copying firmware and a prepared game or homebrew image to the Pico-based cartridge. It is not a procedure for changing the N64 console’s own firmware. The PicoCart64 guide says the cartridge can boot homebrew and small commercial game dumps; it does not provide a compatibility list or show that all commercial games run.

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Which PicoCart64 version does what?

The guide describes two configurations. Their capacities are specifications for those project builds, not general guarantees about every Pico-based cartridge.

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Version Boards Stated ROM capacity Status in the guide
v1 “lite” One Raspberry Pi Pico RP2040 board Up to 2 MB with an official Raspberry Pi Pico; the guide names a WeAct RP2040 16MB board as an alternative for more storage. The guide documents setup instructions.
v2 Two Raspberry Pi Pico RP2040 boards Up to 64 MB, according to the project guide. Marked as under active development; it should not be treated as equivalent to the documented v1 build.

The 2 MB v1 limit aligns with the official first-generation Pico’s 2 MB of onboard flash, according to Raspberry Pi’s Pico documentation. The project-specific ROM limit and its alternative-board guidance come from the PicoCart64 guide.

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How the documented v1 setup works

The guide’s workflow uses two kinds of UF2 file: one for cartridge firmware and another built from the ROM image. Follow the project’s instructions for the specific board and build you are using.

  1. Download the PicoCart64 firmware and choose the NTSC or PAL UF2 that matches your console region.
  2. Put the Pico into BOOTSEL mode and copy the selected firmware UF2 to it.
  3. Use the project’s ROM builder to turn a ROM image into a UF2 file.
  4. Copy that ROM UF2 to the board, observing the storage limit for your build.

These steps describe the project guide’s instructions; they are not a claim of independent testing. The guide’s v1 limit is 2 MB for an official-Pico build, while the two-Pico v2 is described as supporting up to 64 MB but remains under development.

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Can it run Nintendo 64 games?

The project guide says PicoCart64 can boot homebrew and small commercial game dumps, so the project is intended to let an N64 use suitable content stored on the cartridge. However, neither the project guide nor Raspberry Pi’s board documentation establishes universal game compatibility. Whether a particular image works is not answered by the published information cited here, so do not assume that a game will work just because it fits within a stated capacity.

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