Adafruit Fruit Jam – An RP2350 mini computer running classic Macintosh

Summary

The Adafruit Fruit Jam is a credit card-sized RP2350-powered mini computer that is designed to run classic Macintosh through the uMac emulator. It supports System 2.0 up to System 7.5.5, 720p video via DVI, audio, and USB keyboard and mouse.Built around the Raspberry Pi RP2350 MCU, the Fruit Jam board also features an ESP32-C6 wireless module and offers DVI output via the RP2350’s HSTX interface, USB-C for bootloading, a microSD card slot for storage, and an onboard TLV320DAC3100 I2S audio DAC for stereo headphones and a mono speaker. There’s also a 16-pin GPIO header, NeoPixels LEDs, tactile switches, and STEMMA QT and JST connectors for expansion. These features make this board suitable for retro emulation, educational projects, and lightweight standalone computing.Adafruit Fruit Jam specifications: Microcontroller – Raspberry Pi RP2350B CPU Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trustzone, Secure boot OR Dual-core RISC-V Hazard3 @ 150 MHz Either two cores can be used. Memory – 520 KB on-chip SRAM Package – QFN-80 Memory – 8MB PSRAM Storage 16MB SPI Flash MicroSD card slot Video Output – DVI via HSTX port Audio On-board TLV320DAC3100 I2S Audio DAC Stereo headphone output Mono speaker output (mini speaker included) USB 1x USB Type-C port for power, bootloading, USB client Dual USB Type-A host ports (keyboard, mouse, game controllers) Expansion STEMMA QT I²C connector 3-pin JST STEMMA connector 16-pin GPIO header (10x A/D GPIOs, 5V, 3.3V, GND) Debug – PicoProbe debug port Misc 5x NeoPixel RGB LEDs 3x tactile switches ON/OFF switch Dimensions – 85.725mm x 53.975mm (credit-card size meets ISO/IEC 7810 ID-1) Fruit Jam Top(left) and Bottom(right) Adafruit Fruit Jam pinout diagram In terms of software support, this development board supports CircuitPython, Arduino IDE, and the Pico SDK (C/C++). The board can also run emulators such as uMac, CP/M (RunCPM), and MCUME for retro platforms. It also supports games, multimedia projects, and custom applications. More inform...