American Megatrends Olympus Pentium II PCI ISA Manual page 68

PCI/PnP Setup,
Continued
IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15 These options specify the bus that the specified IRQ line is used on. These
options allow you to reserve IRQs for legacy ISA adapter cards. These options
determine if AMIBIOS should remove an IRQ from the pool of available IRQs
passed to devices that are configurable by the system BIOS. The available IRQ
pool is determined by reading the ESCD NVRAM. If more IRQs must be
removed from the pool, the end user can use these options to reserve the IRQ by
assigning an ISA setting to it. Onboard I/O is configured by AMIBIOS. All
IRQs used by onboard I/O are configured as PCI/PnP. IRQ14 and 15 will not be
available if the onboard Triton 2 PCI IDE is enabled. If all IRQs are set to ISA
and IRQ14 and 15 are allocated to the onboard PCI IDE, IRQ9 will still be
available for PCI and PnP devices, because at least one IRQ must be available
for PCI and PnP devices. The settings are ISA or PCI/PnP. The Optimal and
Fail-Safe default settings are PCI/PnP.
Reserved Memory Size This option specifies the size of the memory area reserved for legacy
ISA adapter cards. The settings are Disabled, 16K, 32K, or 64K. The Optimal
and Fail-Safe default settings are Disabled.
Reserved Memory Address This option specifies the beginning address (in hex) of the reserved
memory area. The specified ROM memory area is reserved for use by legacy
ISA adapter cards.
The settings are C0000, C4000, C8000, CC000, D0000, D4000, D8000, or
DC000. The Optimal and Fail-Safe default settings are C8000.
62 Olympus PCI Pentium II/Pentium III ISA Motherboard User's Guide