Radio Shack TRS-80 Owner's Manual page 49

CLOCK
Turn
On
Clock
Display
clock {switch)
switch gives irsdos one
of
two
options,
on
or
off.
If
option
is
omitted,
irsdos uses
on.
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.
Clock display
is
off
at
trsdos
start-up.
Note: Except during cassette
and disk
i/o,
the real-time
clock
is
always running,
regardless of
whether
the
clock display
is
on.
Examples
CLOCK
Turns
on
the
clock display.
CLOCK (OFF)
Turns
the
clock display
off.
See time and date.
CLS
Clear the
Screen
CLS
This
command
clears the
Display and
puts
it
in
the
64
character/line
mode.
Example
CLS
33