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PS/2 Keyboard+Mouse to USB adapter : ID 971 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: DONG USB to PS/2 PS2 Male to Female Cable Adapter Converter Use USB to PS2 Cord Converter Adapter for Keyboard Mouse : Electronics
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How to make your own ps/2 to usb convertor for old keyboards - Electrical Engineering Stack Exchange
StarTech.com USB to PS/2 Adapter - Keyboard and Mouse - Keyboard Adapter - USBPS2PC - Cable Connectors - CDW.com
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GitHub - nazmifr/TinyXT: Minimal doc and schematics to build a working PS/2 keyboard converter PC -> XT AT PS/2 & DIN5
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