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Interrupt IRQx not free
Adress 0x380h already in use by another program
The conflicts appear when e.g. two plug-in boards use the same interrupt or write to the same port address. Or when the I/O area is used by other components.
Due to this, the computer cannot reach clearly the single components anymore or the signals for one component are wrongly interpretated by the others (logically).
Most of the BIOS manufacturers (Award, AMI, etc.) have allowed for this, by being able to set an interrupt to the different PCI plug-in places. Or by being able to set, which interrupts the system can use for automatic configuration. Or which interrupts appearing on the ISA bus are passed on to devices on the PCI bus.
The slots in PCI systems are operated on four interrupt lines INTA to INTD (not to confuse with the IRQs). The assignment of interrupts and interrupt lines either takes place automatically, is fixed (older boards) or can be set with the BIOS setup.
This entire interrupt configuration runs generally under the keyword "Plug and Pray", in the BIOS setup as PCI configuration too.
See also:
Keywords: PCI, INTERRUPT, BIOS, BOOT, SCSI
Feedback welcome: Send Mail to martin.scherbaum@suse.de (Please give the following subject: SDB-maddin_pcibios
)
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