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Mitsubishi Electric Apricot LS660 Owner's Handbook Manual Page 33

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E x p a n s i o n c a r d s
ISA Interrupt request level (IRQ)
4/2
LS/VS660 OWNER'S HANDBOOK
Caution
Caution
This system complies with the CE marking directive and its strict legal
requirements. Use only Apricot tested and approved parts. Failure to do
so may result in invalidating both the compliance and your warranty.
All expansion cards or upgrade components must carry CE marking.
The interrupt request level or IRQ is the line over which the
expansion card sends a signal to get the attention of, or interrupt,
the processor. Many of these are reserved for components on the
computer's motherboard. Some of these interrupts are fixed, others
can be re-assigned, or freed by disabling the component with BIOS
Setup, as shown in the following table:
IRQ
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
Primary ATA/IDE interface
IRQ15
Secondary ATA/IDE interface
IRQ3 is available if you disable serial port 2 with the BIOS Setup utility.
IRQ4 is available if you disable serial port 1.
Default assignment
System timer
Keyboard controller
System
Serial port 2
Serial port 1
Audio (if fitted)
Diskette controller
Parallel port
Real time clock
Mouse
Coprocessor
Available?
No
No
No
Optionally
Optionally
Yes
No
Optionally
No
Yes
Yes
Yes
No
No
Optionally
Optionally

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