Radio Shack TRS-80 Owner's Manual page 89

TRSPO
SJ
r
-7
*S»;
f?5
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 Fies
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.
If
you need
to
run
files
created
under
either
Model
111
TRSDOS
1
.
1
or
1
.2
with
Model
III
TRSDOS
1.3,
you must
first
use the
XFERSYS command.
An
additional feature
of
TRSDOS
1.3
XFERSYS
allows
you
to
copy system
files
(but not operating
system
files)
onto a data disk.
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
(ENTER)
.
After the
program
heading appears,
trsdos
will
prompt you with
DISKETTE
TO
CONVERT READY
IN
DRIVE
1
(
Y Q )?.
Type
Y (yes)
or
(quit)
and
press
(HUD.
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