[danjovic] has you covered with the open-source EXPS/2 keyboard adapter. It will allow you to connect either a PS/2 keyboard or a USB keyboard in fallback mode to the Expert using an ATMega328P ...
Hosted on MSN4mon
Open source, single-PCB HIDman adapter lets peripherals to easily interface with old PCs that don't support USBEven if you can use custom drivers and adapters to force USB support ... third buttons, PS/2 mice with support for up to 5 buttons, and a variety of classic keyboards and controllers, including ...
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