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Status:
Parallel Poll:
Write Loopback Record
Type:
Purpose:
Description:
HP-18 Sequence:
ATN
ATN
HP 9895A Disc Memory Command Set
A·25
No errors.
Sl
- 0
Stat 2 - Cleared, the bits E, F, C and * set, if appropriate.
DSJ
-2
lllegal cylinder number.
Sl
- Drive attention
Stat2 -
Bit C and *are set.
DSJ
-1
The parallel poll response is re-enabled after the operation
is completed, normally or abnormally. If additional com-
mands are sent before the controller is ready and while
self-test is in progress, they will be lost.
Control.
The 9895A stores up to 256 bytes in its internal buffer. A
diagnostic could use the command, along with the read
loopback record, to test the operation of the HP-IB link.
After receiving the write loopback record secondary, the
controller will store up to 256 bytes in the internal buffers.
If less than 256 bytes are sent, the last byte must be tagged
with an EOI.
Write Loopback Record
EOI
ATN
p
p
I
POIADDRSI
Primary
Listen
PllllllO
P
I
Secondary
I
D
~
I
POllllll
I
Status:
Parallel Poll:
I to 256 Data Bytes
No errors.
Sl
- Unchanged
Stat 2 - Unchanged
DSJ
- Unchanged
Unlisten
If less than the specified number of bytes is accepted by the
HP-18 controller, the parallel poll response will be re-
enabled by the Untalk command.
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