https://hackaday.com/2017/10/29/analyzing-the-6502-with-python-and-cheap-dev-boards/
The Before Times were full of fancy logic analyzers. Connect the leads on these analyzers to a system, find that super special ROM cartridge, and you could...
dev boardsanalyzingpythoncheaphackaday
https://www.latticesemi.com/en/Products/DevelopmentBoardsAndKits/SingleWire
Single Wire Signal Aggregation Dev Board uses the smallest form factor FPGAs to perform as a Single-Wire aggregator for I2C, I2S, UART, & GPIO signaling.
single wiredev boardsignalaggregationlattice