PS/2 library of 2200 series MCU can not simulate, what aspects should be checked on hardware?
Check the emulator hardware (whether the short caps of AVREFH/VDD, AVREFL/VSS, INTERNAL_5V
on the right are shorted), EV_KIT (Slide switch to PS/2 is enabled; D+, D- jumper
shorted cap is shorted)。