System Overview
1-19
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IRQ8
Generated by RTC alarm event.
IRQ9
Available for use by an expansion card.
IRQ10
Available for use by an expansion card.
IRQ11
*
NIC/default PCI IRQ.
IRQ12
Generated by keyboard controller to indicate that mouse’s output
buffer is full.
IRQ13
Generated by math coprocessor to indicate coprocessor error.
IRQ14
Generated by device connected to primary EIDE port to indicate
that device requires service. If the EIDE controller is disabled,
this line is available for other use.
IRQ15
Generated by device connected to secondary EIDE port to indi-
cate that device requires service. If the EIDE controller is
disabled, this line is available for other use.
*
If an ISA expansion card is configured for IRQ11, the optional NIC or PCI IRQ is assigned
to another available IRQ line.
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DREQ0
Available
DREQ1
Available
DREQ2
Generated by super I/O controller to initiate DMA cycle for
attached diskette drive
DREQ3
Available
DREQ4
Generated by bus controller chip to activate second DMA
controller
DREQ5
Available
DREQ6
Available
DREQ7
Available
NOTE: The built-in audio controller, NIC (optional), and video controllers are assigned available
DMA channels automatically during system start-up.
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Содержание OptiPlex G1
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