MSE(4)

NAME
mse - bus mouse driver

DESCRIPTION
This is a simple driver for the Logitech and ATI Inport bus mouse interfaces designed to be used with the X386 X11R5 X server. The minor device number is made up of:

    minor = ('unit' << 1) | 'non-blocking'

where 'unit' is the device number (usually 0) and the 'non-blocking' bit is set to indicate "don't block waiting for mouse input, return 0 instead". The 'non-blocking' bit should be set for X386, therefore the minor device number usually used for X386 is 1.

Caveats
Most bus mice generate N interrupts/second when enabled, whether or not the mouse state is changing.