CP302
CMOS Setup
ID 21112, Rev. 05
Page 4 - 25
®
PEP Modular Computers GmbH
PNP OS Installed
Select “Yes” if the system operating environment is PlugandPlay aware (e.g. Win 95).
Resources Controlled by
The Award PlugandPlay BIOS can automatically configure all the boot and
PlugandPlay-compatible devices. If you select Auto, all the interrupt request (IRQ) and
DMA assignment fields disappear, as the BIOS automatically assigns them.
Reset Configuration Data
Normally this field is left Disabled. Select Enabled to reset Extended System
Configuration Data (ESCD) when you exit Setup if you have installed a new add-on and
the system re-configuration 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.
DMA 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.
PCI EIDE IRQ Map to
This field lets you select PCI EIDE IRQ mapping or PC AT (ISA) interrupts. If your
system does not have one or two PCI EIDE connectors on the system board, select
values according to the type of EIDE interface(s) installed in your system (PCI or ISA).
Standard ISA interrupts for EIDE channels are IRQ14 for primary and IRQ15 for
secondary.
Primary/Secondary EIDE 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 EIDE interface in the chipset has two channels, it
requires two interrupt services. The primary and secondary EIDE INT# fields default to
values appropriate for two PCI EIDE channels, with the primary PCI EIDE channel
having a lower interrupt than the secondary.
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 PlugandPlay standard, whether
designed for PCI or ISA bus architecture.
Legacy ISA
Devices compliant with the original PC AT bus specification,
requiring a specific DMA channel
PCI/ISA PnP
Devices compliant with the PlugandPlay standard, whether
designed for PCI or ISA bus architecture.
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