[plug] PS2 - DB9

[Denis Brown]

Hi, Walter.

To the best of my knowlege the internal workings of standard PS/2 mice and
DB-9 serial mice are identical and the only difference is the physical
connector.

It may well be that your Genius Net Mouse has some extended functionality
which would require the use of their (Genius) driver software.

Internal to the motherboard however, the PS/2 mouse is handled by the same
chip as drives the keyboard, a variant of the 804x embedded controller
series.  The embedded controller generates and decodes the serial clock and
data streams in software (corrections, anyone?) while the serial mouse's
interface is a regular UART chip, i.e. hardware generadtion / decoding.

Cheers,
Denis