Patent Number: 6,170,029

Title: Voltage overshoot control in hot plug system

Abstract: A method and implementing computer system is provided in which PCI bus load conditions are detected and dummy loads are selectively switched into the PCI bus under light load conditions in order to avoid voltage overshoot problems. Load control logic receives input signals representative of the presence or absence of adapters connected into PCI slots. The load control logic is connected to load control switches. The load control switches are arranged to selectively connect to the PCI slot or to a dummy load. The load control system is selectively operable, by controlling the load switches, to connect dummy loads into empty PCI slots to dampen the bus when light load conditions are detected to exist on the PCI bus. In a PCI system hot plug environment, the system is operable to quiesce the slot being hot plugged so that the adapter can be removed or inserted into a PCI slot while maintaining acceptable PCI bus loading conditions.

Inventors: Kelley; Richard Allen (Apex, NC), Neal; Danny Marvin (Round Rock, TX)

Assignee: International Business Machines Corporation

International Classification: G06F 13/40 (20060101); G06F 013/00 ()

Expiration Date: 01/02/2018