Chapter 2: Running Setup
2-17
DMA Channel 0
DMA Channel 1
DMA Channel 3
DMA Channel 5
DMA Channel 6
DMA Channel 7
These DMA channels control the data transfers between the I/O
devices and the system memory. The chipset allows the BIOS to
choose which channels to do the job. The settings are PnP or
ISA/EISA.
IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15
These options specify which bus the specified IRQ line is used
on and allow you to reserve IRQs for legacy ISA adapter cards. If
more IRQs must be removed from the pool, the end user can use
these options to reserve the IRQ by assigning an ISA/EISA 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 PCI IDE is
enabled. If all IRQs are set to ISA/EISA and IRQ14 and 15 are
allocated to the onboard PCI IDE, IRQ 9 will still be available for
PCI and PnP devices. This is because at least one IRQ must be
available for PCI and PnP devices. The settings are PCI/PnP or
ISA/EISA.
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.
Summary of Contents for 440LX
Page 1: ... SUPER 440LX Chipset AMI BIOS REFERENCE MANUAL Revision 1 1 ...
Page 5: ...PRINTED IN U S A ...
Page 35: ...BIOS User s Manual A 4 ...
Page 45: ...BIOS User s Manual B 10 ...