Mitsubishi Electric apricot MS660 Owner's Handbook Manual page 52

Some of these interrupts are fixed, others can be re-assigned, or
freed by disabling the component with BIOS Setup.
The following table lists the interrupts used by the computer and
shows which may be available for use by expansion cards.
IRQ
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Note Note
If you disable the interrupt which has been assigned to serial port 2 you
will disable the IR sensor used for the optional infra-red remote control.
IRQ3 is available if you disable serial port 2 with the BIOS Setup utility.
IRQ4 is available if you disable serial port 1.
Do not disable either one unless you have no intention of using the
affected port. Similarly, if you have no intention of using the
parallel port, you can disable it with the BIOS Setup utility,
completely freeing IRQ7 for use by an expansion card.
Default assignment
System timer
Keyboard controller
System
Serial port 2
Serial port 1
Audio
Diskette controller
Parallel port
Real time clock
Mouse
Coprocessor
Primary ATA/IDE interface
Secondary ATA/IDE interface
MS660 OWNER'S HANDBOOK
E x p a n s i o n c a r d s
Available?
No
No
No
Optionally
Optionally
No
No
Optionally
No
Yes
Yes
Yes
No
No
No
No
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