TYAN TIGERCUB ATX Manual page 62

Chapter 4
BIOS Configuration
have installed a new add-on and the system reconfiguration has caused
such a serious conflict that the operating system cannot boot.
IRQ n Assigned to
When resources are controlled manually, assign each system interrupt
as one of the following types, depending on the type of device using the
interrupt:
Legacy ISA: Devices compliant with the original PC AT bus
specification, requiring a specific interrupt (such as IRQ4 for
serial port 1).
PCI/ISA PnP: Devices compliant with the Plug and Play
standard, whether designed for PCI or ISA bus architecture.
DMA n Assigned to
When resources are controlled manually, assign each system DMA
channel as one of the following types, depending on the type of device
using the interrupt:
Legacy ISA: Devices compliant with the original PC AT bus
specification, requiring a specific DMA channel
PCI/ISA PnP: Devices compliant with the Plug and Play
standard, whether designed for PCI or ISA bus architecture.
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 connec-
tors on the system board, select values according to the type of IDE
interface(s) installed in your system (PCI or ISA). Standard ISA
interrupts for IDE channels are IRQ14 for primary and IRQ15 for
secondary.
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. Because the PCI IDE interface in the chipset has two chan-
nels, it requires two interrupt services. The primary and secondary IDE
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