USB WonderSwan Cartridge Utility
A WonderSwan cartridge dumper and programmer.
Prototype
The prototype is being developed on a vcc-gnd.com STM32F103ZET6 development board. Although, no longer in production, they're readily available for purchase on AliExpress.
VCC-GND STM32F103ZET6 Main Board
Details, including photos and schematics are archived at https://stm32-base.org/boards/STM32F103ZET6-VCC-GND-XLarge.html
VCC-GND STM32F103ZET6 Adapter Boards
The following adapters boards are open-source hardware and designed with KiCad.
Debug Boards
The following boards are optional and used to facilitate with debugging and reverse engineering.