Silicon Graphics Prism Hardware User's Manual page 161

007-4772-002
Driver "mouse"
Option "Device" "/dev/input/mouse0"
# ...
EndSection
Note: See "Identifying Event Devices" on page 136 for instructions on how to
determine the appropriate event device.
Note: You may assign any number of pointing devices to a single Xserver, but no
pointing device may be assigned to more than one Xserver.
XF86Config File Changes
139