Amazon.com: LEIHONG PS/2 to USB Cable USB to PS/2 Plug Active USB to Dual PS/2 Adapter Keyboard Mouse Converter Adapter for The Keyboard PS2 (White) : Electronics
How to convert a PS/2 keyboard to USB without an adapter - Quora
Ps/2 keyboard to usb | Tom's Hardware Forum
ps/2 to USB adapter converter for keyboards – ClickyKeyboards
Cheap USB to PS/2 Teardown - YouTube
How to design a keyboard circuit that can use a passive USB-to-PS/2 adapter? - Electrical Engineering Stack Exchange
XT/AT/PS2/Terminal to USB Converter with NKRO - Hardware
GitHub - nazmifr/TinyXT: Minimal doc and schematics to build a working PS/2 keyboard converter PC -> XT AT PS/2 & DIN5