Does the Intel 80312 I/O Companion Chip support Private PCI devices?
The Intel 80312 I/O Companion Chip does support “Private PCI Devices.” According to section 1.3.3 of the Intel 80312 I/O Companion Chip Developer’s Manual, under the title Private PCI Device Support, it states, “A key Intel 80312 I/O companion chip feature is that it explicitly supports private PCI devices on the secondary PCI bus without being detected by PCI configuration software. The bridge and Address Translation Unit work together to hide private devices from PCI configuration cycles and allow these devices to use a private PCI address space.
