A host-side wireless interface services communications between a wireless
user input device and a serviced host. The host-side wireless interface
includes a wireless network interface, a host interface, and may include
additional components. The wireless network interface wirelessly
communicates with the wireless user input device. The host interface
communicatively couples to the wireless interface and to the serviced
host. When the serviced host initiates bootstrap operations via a Basic
Input/Output System (BIOS), the host interface operates in a BIOS host
interface mode to allow input from the wireless user input device to the
BIOS during the bootstrap operations. Further, when the serviced host
initiates Operating System (OS) operations, the host interface operates
in an OS host interface mode, wherein the OS host interface mode differs
from the BIOS host interface mode. In this fashion, the user of the
wireless user input device may interface with the BIOS during booting
operations prior to loading and configuration of the OS.