Mitsubishi Electric Apricot LS 550 Owner's Handbook Manual page 48

Computer
Table of Contents

Advertisement

Some settings are done by jumpers and/or switches on the card and
are best done before installation, others are configured by running
installation software after installation. Some cards use a mixture of
both methods.
The documentation accompanying the card should tell you what is
required. Remember to check any diskettes supplied with the card
for README or other help files, before you start. If you are in any
doubt consult the supplier or manufacturer.
Cards often come with pre-configured or default settings. It is best
to rely on these settings as much as possible, and change them only
if they conflict with other devices.
ISA Interrupt request level (IRQ)
The interrupt request level or IRQ (the two terms are used
interchangeably) 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.
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
Default assignment
System timer
Keyboard controller
System
Serial port 2
Serial port 1
Audio (if fitted)
Diskette controller
Parallel port
Real time clock
LS/VS 550 OWNER'S HANDBOOK
E x p a n s i o n C a r d s
Available?
No
No
No
Optionally
Optionally
Yes
No
Optionally
No
4/3

Advertisement

Table of Contents
loading

Table of Contents