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■ Location of expansion cards
PCI1
PCI2
■ Applicable expansion cards
The PC accommodates an expansion card for the PCI bus.
For expansion cards to operate, “resources” must be assured.
The floppy disk drive or hard disk drive built in the PC uses a path predetermined for each device
to exchange data with the CPU or memory. These paths have subclasses including I/O port
addresses, DMA channels, interrupt levels (IRQ), which are collectively called “resources.”
Since expansion cards for the PCI bus support Plug & Play, they set resources automatically.