Table 4-8. Bus Type String Values
Bus Type String
Each bus in a system must have a unique BUS ID if any one of the following criteria are true:
The bus does not share its memory address space with another bus.
The bus does not share its I/O address space with another bus.
The bus does not share interrupt lines with another bus.
Any aspect of the bus as an independent entity is software visible (such as PCI configuration
Special consideration must be given when assigning a BUS ID for local buses such as VL, which
are designed to work in conjunction with another bus. If the bus looks like a part of another bus
because it uses a subset of that bus's interrupts and address space, rendering it totally invisible to
software, it does not need its own bus entry in the table. The two buses are then considered a single
Corollary CBUS II
Industry Standard Architecture
Micro Channel Architecture
Apple Macintosh NuBus
Peripheral Component Interconnect
PC Memory Card International Assoc.
VESA Local Bus
Express System Bus
MP Configuration Table