@Greenaum. One of the USB AVR series will do what you want.. like the 32u2 or 32u4. You can use avr-gcc/avr-libc just fine with it and upload your code via it’s usb port.

There was plenty of code and examples that showed how you could read the mouse position and clicks from the Arduino, but [rehsd] still had to figure out a way to get that information into the 6502.

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