B&R Industries Provit 5000, User Manual

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266 Provit 5000 User’s Manual
Software • BIOS System for System Units with Socket 7 (ZIF)
IRQ-n Assigned to / DMA-n Assigned to
The settings "Legacy ISA" and PCI/ISA PnP are possible.
Legacy ISA is used, if ISA devices require a special interrupt or a special DMA
channel. Plug & Play compatible devices work with the setting PCI/ISA PnP.
PCI IRQ Activated by
Leave the IRQ trigger set at Level unless the PCI card assigned to the interrupt
specifies Edge-triggered interrupts (see documentation for the respective device).
PCI IDE IRQ Map to
This field lets you select PCI IDE IRQ mapping or PC AT (ISA) interrupts.
If your system does not have one or two PCI IDE connectors on the system board,
select values according to the type of IDE interface(s) installed in your system
(PCI or ISA).
Standard settings for ISA interrupts on IDE channels: IRQ14 for the primary
channel and IRQ15 for the secondary channel.
Primary/Secondary IDE INT#
Each PCI peripheral connection is capable of activating up to four interrupts: INT#
A, INT# B, INT# C and INT# D. By default, a PCI connection is assigned INT# A.
Assigning INT# B has no meaning unless the peripheral device requires two
interrupt services rather than just one. If the PCI IDE interface in the chipset has
for example two channels, it then requires two interrupt services. The primary and
secondary IDE INT# fields default to values appropriate for two PCI IDE channels,
with the primary PCI IDE channel having a lower interrupt than the secondary.