HP 54501A Programming Reference Manual page 181

MASK
MASK
command/query
The
:DISPLAY:MASK command inhibits the instrument from writing to
selected areas of
the screen. Text
sent
over the HP-IB with the line and
string
commands, or the
SYSTEM:DSP
command
is
not affected
by this
command.
The
purpose
of
the command
is
to allow
HP-IB
text to be
written anywhere on screen and to prevent the instrument from
overwriting the
text
through
its
normal operation.
The
mask parameter
is
an 8-bit integer in which each bit controls writing
to an area
of
the screen.
A
zero inhibits writing
to
the area represented by
the bit, and
a
1
enables
writing to
that area.
The
MASK
query returns the current value of the MASK.
Command
Syntax:
:Dispiay:MASK
<
value
>
Where:
<
value >
::
=
0 to
255 (integer
•
NR1
format)
Example: OUTPUT 707;":DISPLAY:MASK 67"
The previous example enables
writing to the
Menu Area (bit
6), the Status
Line (bit 1), and the Advisory Area (bit
0).
Query Syntax: :Dispiay:MASK?
Return Format: [:Dispiay:MASK]
<value> <NL>
Where:
< value > ::
=
0
to
255
(integer
•
NR1
format)
Example: DIM
Msk$[30]
OUTPUT
707;":DISP:MASK?"
ENTER
707;
Msk$
PRINT Msk$
Display Subsystem
11-12
HP 54501A
Programming