Software Installation
Download
First, download the latest Pico Bootloader release here.
Enter RP2350 bootloader mode
Entering the RP2350 bootloader is easy. Complete the following steps.
Before you start, make sure your Fruit Jam is plugged into USB port to your computer using a data/sync cable. Charge-only cables will not work!
Turn on the On/Off switch - check that you see the ON light on so you know the board is powered.
To enter the bootloader:
- Press and hold the BOOT/BUTTON1 button down. Don't let go of it yet!
- Press and release the Reset button. You should still have the BOOT/BUTTON1 button pressed while you do this.
- Continue holding the BOOT/BUTTON1 button until you see the RP2350 drive appear.
- You can now release but BOOT/BUTTON1 button.
Drag UF2
Navigate to the folder where you downloaded the uf2 file, then drag it onto the RP2350 drive.
The board will automatically reboot and retroJam will launch automatically.
microSD Card Setup
Format a microSD card to FAT32 or exFAT.
Download pico-bootLoader_sdcard.zip from the same Releases page linked above and unpack it onto the SD card. The archive contains the emulators, the Doom port, the menu artwork, and a sample configuration file.
Alternatively, assemble the layout yourself as described in SD card layout.
Then, copy your legally acquired ROMs to their respective folders.
/boot.txt optional configuration (defaults apply if absent) /emu/ BASEDIR (default /emu, override in boot.txt) /emu/<HW_CONFIG>/*.uf2 applications for this board (e.g. /emu/8/) /emu/emulators.txt the index / allow-list (name set by INDEX) /emu/assets/<image_key>.png|.jpg menu artwork, converted on first use /emu/assets/screensaver/*.png|.jpg screensaver images (optional) /emu/.guimode persisted menu mode (created automatically)
Page last edited July 29, 2026
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