| 摘要 |
A Hot Plug system includes a PCI bus, an expansion card, a slot for receiving the expansion card, and a Hot Plug controller directly connected to the expansion card and the slot, but only indirectly connected to the PCI bus. An enhanced arbiter monitors and controls the PCI bus on behalf of the Hot Plug controller, thereby allowing the Hot Plug controller to be disconnected from the PCI bus and reducing a critical load on the PCI bus. Because the Hot Plug controller no longer needs to perform monitoring and controlling functions on the PCI bus, the logic within the Hot Plug controller can be significantly simplified. However, the Hot Plug controller still maintains direct control over the expansion slots and associated expansion cards. In one embodiment, the enhanced arbiter with Hot Plug capability is implemented with a bridge on a chipset.
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