_Arduino code requires keypad library by Mark Stanley, Alexander Brevig from:_
http://www.arduino.cc/playground/Code/Keypad

_Uses the PJRC Teensy++ 2.0 and Teensyduino libraries, specifically USB HID and Keyboard():_
http://www.pjrc.com/teensy/teensyduino.html

Disconnect the Apple II keyboard ribbon cable from the logic board, and plug it into the RetroConnector Keyboard Shield. If you need a cable, one can be purchased at http://retroconnector.com

To emulate F-keys F1 through F10, press caps lock. When the keyboard is in caps lock mode, the number keys 1 through 0 will return F1 through F10.