README Interface a C64 with an Arduino using Firmata. This is a Firmata client implementation for the C64 using the userport at 2400 baud for communications.

The C64 is able to display the state of the LED, relay and servo outputs, as well as read the Arduino’s button and potentiometer inputs.

On the C64 short board (eg. 250469), the cold boot reset is way shorter (2-300ms), than on the older boards (2000+ms). When you install an Arduino kernal switcher, the c64 boots faster, than arduino ...

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