In a dockable computer system capable of hot docking or warm docking, a docking safe circuit drives the bus of the portable computer and docking station to a docking safe state in response to a DOCK signal. The DOCK signal may be a notice signal indicative of a change of state from the undocked state...http://www.google.com/patents/US5598537?utm_source=gb-gplus-sharePatent US5598537 - Apparatus and method for driving a bus to a docking safe state in a dockable computer system including a docking station and a portable computer
