Radio Shack TRS-80 model III Owner's Manual page 80

TRSDOS
The program
automatically
tests all
memory
locations,
no
matter
what
memory
size
you
have.
First
it
checks read only
memory
(rom);
if
everything
is
okay,
it
automatically goes
on and
checks
random
access
memory
(ram).
If
all
ram
checks
out okay, the
program
continues.
If
the
program
detects a
rom
or
ram
error,
it
will display a detailed
message.
Repeat
the
test to
make
sure
it is
a valid error condition. Write
the
message
down
and
contact
your
nearest
Radio Shack
for assistance.
Note:
memtest
changes
the entire contents of
ram. Before running
it,
be
sure
you have saved any valuable
code you
may
have
in
ram.
XFERSYS
Transfer
System
Files
XFERSYS
xfersys
lets
you upgrade your version of
Model
III
trsdos by
copying
all
system
files
from
a
new
release diskette (source)
onto
a previously released
diskette (destination)
(i.e.,
version
1.2 to
version
1
.3,
etc.).
System
files
which
already
exist
on
the destination diskette are replaced
by
those
from
the source diskette. Files
which do
not exist
on
the destination diskette are
added.
User
files
(program and
data) are unaffected.
Steps
to
upgrade a
diskette
Make
backup
copies of
all
diskettes to
be upgraded. This
is
an important
precautionary
step.
These backup
copies should be
kept
until
the
upgrading
process
is
complete and confirmed.
Note:
Both
source
and
destination diskettes
must be
write-enabled.
Insert the
new
release of
trsdos
into
Drive and
press the
reset
button.
Then
type
XFERSYS
CENTER)
.
After the
program
heading appears,
trsdos
will
prompt you
with
DISKETTE
TO
CONVERT READY
IN
DRIVE
i
(
Y/Q
)?.
Type
Y
(yes) or Q (quit)
and
press
[ENTER)
.
The upgrading process
will
then take place.
When
the process
is
complete,
trsdos
will
tell
you
so
and
take
you back
to
trsdos ready.
Note:
If
an error occurs, including
your
trying
to
upgrade
a
non-system
diskette,
the
operation
will
be cancelled
and
take
you back
to
trsdos ready.
73