HP 54501A - Page 77

REFER
TO
SERIAL
POLL STATUS
REPORTING
iJHHH
UN
TIO
§
)
<
0
>—i
8
J
r
••"
7
MSS
ESB MAV
LTF
MSG LCL TRG
1
•*-(&
t
•^——
7654.3210
M501/BLZ1
^
^
,
^
5,
/-
s
1
'^
~\
1
'
p,
M
i
),
K
;
),
1
)
INDIVIDUAL
STATUS
READ
BY
«IST?
STATUS BYTE
REGISTER
READ
BY
«STB?
PARALLEL POLL
SET
BY
*PRE
<NRf>
Figure
3-32.
Parallel Poll
Data Structure.
HP
54501A
Programming
Message
Communication
and System
Functions
3-35