A-28
HP
9895A
Disc
Memory Command
Set
HP-IB Sequence:
ATN
IPOl~DDRSI
Pnmary
Listen
Head
•
On
seek
completion.
Status:
Parallel Poll:
ATN
I
Pll01000
I
Secondary
P
P
D
00010
Opcode
I
+-
Cylinder -
EOI
ATN
Sector
I
I
POllllll
I
Unlisten
Successful seek.
S1 - Drive attention
Stat
2 - Bit A set (drive attention)
DSJ - 0
Unsuccessful seek.
UUUU
1
Unit
P*
p
E
1. Illegal seek parameter, target track not found, off
end
of disc.
S1 - Drive attention
Stat
2 - Bits A
and
C
set
(see check)
DSJ
-1
2. Drive
not
ready during seek, track 0 indicator
not
found when expected.
S1 - Drive attention
Stat
2 - Bits A
and
E set (drive fault)
DSJ
-1
No disc, disc not ready, first status bit holdoff, disc not
formatted, unknown format.
S 1 - Status 2 error
Stat
2 - Unchanged
DSJ
-1
The parallel poll response
is
re-enabled after the operation
is
completed, normally
or
abnormally. Normal completion
occurs when the target cylinder is reached.
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