The Sum adapter family enables connecting USB HID keyboards to your Commodore Amiga classic models. The Sum USB adapter provides built-in USB stack which enables USB HID keyboards support without the need for installing additional AmigaOS software drivers. Additional feature of the adapter is its „Bootloader” function allowing future firmware upgrades. Sum comes with dedicated configuration mode, which becomes available when one presses simultaneusly R-Shift + Pause keys. User preferences are saved to the built-in EEPROM memory! You can purchase the Sum USB adapter on the webstore of www.retro-ami.pl for various Commodore Amiga models. Prices start at € 29,36 for Commodore Amiga 600/1200 and €34,44 for Commodore Amiga workstations such as Commodore Amiga 2000/3000/4000.