Technical data

Server Software and Utilities
2-10
2.
ISA assignments take priority over PCI assignments.
3.
A PCI device cannot use the same IRQs that is already used by an ISA device.
4.
In the 3220 and 3220R series servers, IRQ14 is fixed for the single channel
IDE.
Limitations: The following limitations are only for DOS and Novell operating
systems:
5. SCSI and Ethernet cards cannot share the same PIRQ line in a uniprocessor
environment; therefore, do not insert a SCSI board into a slot with the same
PCIRQ assignment as the Ethernet. Likewise, do not insert an Ethernet card
into a slot that has the same PCIRQ assignment as a SCSI controller.
Examples:
A. The E-Net controller in the Proprietary slot uses PIRQB; therefore, do not
install a SCSI controller into slots 3 or 4, because these slots are also
assigned PIRQB.
B. The on-board SCSI uses PIRQC, so do not use slot 5 and 6 for an E-net
card, because these slots are also assigned PIRQC.
C. Because both slots 1 and 2 use the same PIRQA, if you install a SCSI
card into slot 1, do not install an E-net card into slot 2.
To map hardware IRQs, during the BIOS POST, press [F2] to enter the BIOS
Setup. Select the
Advanced
menu at the top of the screen. Select the
PCI
Configuration
submenu. PCI IRQ lines can be mapped to any one of the
IRQs that are displayed in the Setup menu.
PIRQA => PCI IRQ line 1
PIRQB => PCI IRQ line 2
PIRQC => PCI IRQ line 3
PIRQD (USB IRQ) => PCI IRQ line 4