MSX Goa'uld Friend

The MSX Goa'uld Guardian Angel for hard tasks. Made with RP2040 Zero.

Make sure to power Raspberry Pi Pico to MSX 5V power supply to Vout pin.

Wiring

Device	Function	Pin	Connection Note
Tang Nano 20k UART TX	UART TX	79	Connect to RX of RP2040
Tang Nano 20k UART RX	UART RX	80	Connect to TX of RP2040
RP2040 UART TX	UART TX	GPIO 0	Connect to RX of Tang Nano 20k
RP2040 UART RX	UART RX	GPIO 1	Connect to TX of Tang Nano 20k

Note: built for waveshare RP2040 Zero, builtin LED is GPIO16. Both FPGA and RP2040 must compatible firmwares together.

Build Instructions

Before build, make sure to:

• have pico-sdk with tinyusb library
• check PICO_SDK_PATH environment variable linked to pico-sdk directory

mkdir build && cd build
rm -rf * && cmake -DFAMILY=rp2040 -DBOARD=raspberry_pi_pico -G Ninja .. && cmake --build .

Some ideas

• Scanlines toggle button
• OSD toggle button
• USB Keyboard basic functionalities
• USB Keyboard
• USB Gamepad
• Reset button (needs MSX external mod in reset wire, WIP)
• USB Floppy Drives
• USB Mass Storage
• Ethernet USB adapters
• Bluetooth USB adapters
• WiFi USB adapters
• BIOS Switching
• TF Support
• OSD Control over PSG default control ports pins (needs OSD dedicated button)