Vintage input adapters

Uses a PS/2 keyboard on supported Commodore computers or converts their original keyboards and optional joysticks for a PS/2-equipped host.

For this platform (bus/interface): In device mode C=Key converts supported VIC-20, C64, C64C, SX-64, C128, C128D, and C128DCR keyboards to PS/2 scan codes for a PS/2-equipped host. Optional dual DE9 sockets expose Commodore joysticks for emulator use. The required PS/2 mouse-style cable is not included.

The RETRO Innovations store exposed a configuration selector and Add to Cart path on 2026-07-30, with the bare PCB listed at USD 6 and configured kits priced separately. Kits and assembled units are made after ordering and normally take four to five weeks. The maker explicitly treats C=Key as a project rather than a fully supported product because its firmware is not extensively tested or easily upgraded; an AVR programmer is strongly recommended. Use a true PS/2 keyboard because passive USB adapters may not work.

Turns as many as two Atari-style digital joysticks or four paddles into USB input devices for a modern computer.

For this platform (bus/interface): The adapter connects to a modern host over USB and accepts vintage controllers on its two DE9 inputs. The maker names Raspberry Pi and Windows 10, and reports testing with VICE and WinAPE. Vintage-computer names describe the controllers being reused, not a connection to an original C64.

The repository supplies board fabrication files, a schematic, Arduino firmware, a bill of materials, and assembly guidance. A build needs an Arduino Pro Micro and the components selected for either the Atari-style or Sega configuration. Paddle mode is a JoyConverter firmware option selected while powering the adapter.

Turns supported classic-computer keyboards, digital joysticks, and analog paddles into USB HID input devices for a modern PC, Mac, or Raspberry Pi.

For this platform (bus/interface): Keyrah V3 connects to a modern host by USB. Directly listed keyboard families include C64, SX-64, VIC-20, C16, C128D, Amiga 500, 600, 1200, 4000 and CDTV, plus Atari ST keyboards with the 8-pin connector. PC XT or AT keyboards require the stated PS/2 adapter. C128, C116, Plus/4, PET 8296, CBM2, and Amiga 2000 or 3000 keyboards require added connectors or adapters.

The maker's store listed Keyrah V3 for immediate delivery on 2026-07-15. The box includes the circuit board and printed manual but no USB cable. Individual Computers has stopped ordinary shipments to the United States; its stated exception requires a forwarding service and wire-transfer payment, so US buyers should also check the official reseller list.