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4.4.5
SRQ
and
Status
Byte
Check
Test
as
shown
below:
4.4.5.1
Action
HP-85 Code
Your
Controller
Send
the
REN
command
true
REMOTE
7
Set the
1994
to
transmit the
SRQ
command
when
an
error
is
detected,
and
force the
gener-
ation of error
code
0_
by sending device-
dependent
command
XXX
OUTPUT
715;
"IPXXX"
Store the status of
the
GPIB
interface of
the controller,
in
binary form,
as variable
STATUS
7,2;
T
Display
the status of
the
SRQ
line
DISP "SRQ=";
BIT
(T,5)
a.
Verify that the
HP-85
display reads
SRQ=1,
the
SRQ
status
bit
is
at
logic
1.
Confirm
that
the
SRQ LED
is
lit
b.
Test
as
shown
below:
Action
HP-85 Code
Your
Controller
Conduct
a serial poll
R=SPOLL
(715)
and
store the status
byte
as variable
R
Display variable
R
DISP
"R=";
R
c.
Verify that the
SRQ LED
is
extinguished
when
the
serial poll
is
made.
The
value
of
R
should
be
101
(in
binary
form,
R
should
be
0000000001100101)
4-1
5
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