i made PCB of aminet's ps2m hard/hack.
work fine with many ps2mouse
tested e.g (logitech optical (usb ps2 adaptator)
and wireless logitech)... no prob! :-)
i give you image file for example. You need to download amipcb's roland florac software for best view and print.
(see belows on hardware page)
Be care when you print pcb (600x600)disable serigraphie.
the .hex pic 16f84 is in ps2m aminet archive