> A Dell laptop I had recently had both a serial & a parallel port, but no
> PS2.  I thought that was odd.  Had to buy a USB/PS2 converter. 
PS/2 ports on laptops were always a bit of a mess. Firstly there was a couple of different pinout standards for the combination. Secondly there was the need for extra hardware to handle combining of external and internal signals and possiblly hotplugging of the external stuff (though in my experiance said hotplugging was never very reliable).

far far simpler to use the PS/2 lines on the chipset for the internal stuff only and let people use USB for external stuff.


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