Canon Cat Reference Manual page 37

DISK and the
Battery-Powered Memory
The Cat
has a battery-powered
memory that
preserves
important information when
the
power
is
turned off or cut
off
by
a
power failure. This
includes the words
in your
personal spelling dictionary, and setup
information
con-
ceming
documents,
printers,
and modems.
Se,e
Checking
and Correcting Your Spelling, page
53,
and,
Changing
Document Formats, page 94
for
more information. The
battery
lasts many years under normal
circumstances.
Whenever you record
your text, you
record
the
content
of
the
battery-powered
memory as
well. This
keeps this
important information
in two
places
in
case something
should happen
to
the
battery-powered memory.
The Cat
stores certain
information
in
the
battery-powered
memory
that can be used to
determine whether or not the
battery-powered memory
is
up-to-date
(for
the
techni-
cally-oriented, the stored
information is
called
a check-
surn).
Though
a dead
battery is
a rare occurrence,
it
can
cause
a
loss
of memory. A low
battery sign appears on the
ruler when
the
battery
power
dips too
low. Playing
back a
disk
has
no effect on the
battery-powered memory
unless
there are indications that memory contents have
been
damaged
(invalid
checksum).
Should
this
happen,
the
information
recorded on
disk is
transfened
into
the bat-
tery-powered memory.
[SETUP]
can also
be used
to force
the transfer
of information recorded
on
disk to
the
battery-
powered
memory
(see Storage
of
SETUP Information,
pages 95-96,
for
more information).