Radio Shack TRS-80 model III Owner's Manual page 104

DISK BASIC
CMD"R"
T\irn
On
Clock-Display
This
command
controls the real-time
clock
display in the
upper-right corner of
the
Video
Display.
When
it
is
on,
the
24-hour time
will
be
displayed
and
updated once each second,
regardless
of
what program
is
executing.
Note:
The
real-time
clock
is
always running
(except during
cassette
or disk
i/o),
regardless
of whether
the display
is
on
or
off.
Example
To
turn
on
the
clock display
type:
CMD"R"
To
turn the display
off, type:
CMD"T
n
CMD"S"
Return
to
TRSDOS
CMD"S
'!
To
exit
from Disk
basic, returning control
to
trsdos, simply type
in the
command:
CMD"S
n
To
return to
basic and recover your program,
use
BASIC
*.
However, recovery
will
not
always be
possible.
See basic
*.
Example
The
basic
prompt
lets
you
know
you
are
in
Disk
basic.
READY
103