Whats the clocks wire involvment?

[ottoman]

The worst case ps2 for this was the version 5.

A simple way to ensure that the clock wire doesnt cause any problems is to instead of running one wire from clk point to ps2 mobo run two wires twisted together (twisted pair). connect one wire as normal from clock point on chip to clock point on motherboard and the other from ground point on chip to gold edge around outside of ps2 motherboard. This will give the clock wire a deliberate groundloop which should stop it causing any emc problems with other ps2 circuitry.

Regards