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Intel® 460GX Chipset Software Developer’s Manual 8-1
WXB Hot-Plug 8
8.1 IHPC Configuration Registers
Each WXB supports two independent Integrated Hot-Plug
1
Controllers (IHPCs). The A-side
controller (IHPA) and the B-side controller (IHPB) are configured independently. Each IHPC
therefore has its own configuration space. Both configuration spaces are identical.
Each IHPC reserves a 256 byte configuration space. A list of the configuration registers specific to
hot-plug operation follows. The default power-up value is included in each register description
heading. All registers return to their default values upon the assertion of XRST# or PCI reset (for
the particular side in question) unless otherwise noted in the description. The standard PCI
Configuration registers are not described here when implemented exactly as described in the PCI
Specification 2.2.
The following map shows registers specific to the IHPC.
1. WXB Integrated Hot-Plug controller derived from technology licensed from Compaq Corporation.