For my project I need to read inputs from a laser scanner connected via PS/2 interface to my Yún. I first tried the PS2 lib with a keyboard and it functioned well. But the scanner is much faster and now I'm having problems decoding the inputs. 2 of 3 attempts fail because wrong or incomplete characters are read.
I'm using pin 9 for DATA and 2 for CLOCK. I also tried pin 0 for CLOCK and it worked much better, but unfortunately the bridge doesn't work with this configuration.
Does anyone know how to use pin 0 external without conflicting with Bridge?
Yun=Leonardo+AR9331
http://playground.arduino.cc/Main/PS2Keyboard
Make sure you connect the Clock PIN to the digital PIN 3 on the Arduino. Otherwise the interrupt, and therefore the whole library, won't work.
Leonardo Support
Slightly modified the PJRC 2.3 library to work with the Leonardo, the code is currently hosted here:
GitHub - yosemitebandit/PS2Keyboard: Arduino Leonardo-compatible PS2Keyboard library.
Thank you, pin 3 works much better 
Slightly modified the PJRC 2.3 library to work with the Leonardo, the code is currently hosted here:
GitHub - yosemitebandit/PS2Keyboard: Arduino Leonardo-compatible PS2Keyboard library.
This link seems to be broken...