A-16
HP
9895A
Disc
Memory
Command Set
ATN
(IOADDRS
I
Primary
*
Receive Status
ATN
P
I
PIIOIOOO
Secondary I
~
I
OODSSSSS
I I
Stat
1
EOI
ATN
P
TTTTRI
,AW
EFCSS,
P
I
PIOll1llI
E
Stat
2
Untalk
Where:
Bit
51
Binary
(Decimal)
00000
(0)
00001
(1)
00111 (7)
01000
(8)
Number
Description
Stat 1
(From previous operation)
D
13 D Bit
SSSSS
12-8
Sl
(see following table)
UNIT
3-0
Unit Number
Stat 2
(From current operation)
*
15
Set
if
one
or
more starred bits
are set.
TTTT
12-9 Disc Type
R
8 Reserved
A
7
Drive Attention
W
6
Disc is Write Protected
E
4 *Drive Fault
F 3 First
Status
Bit
C
2
*Seek Check
SS
1,0
*Drive Ready Status
Meaning
Normal completion. The operations completed without er-
ror, or the controller has just
been
cleared or powered up.
Illegal opcode. The last
command
contained
an
opcode
which is not recognized by the 9895A.
Cylinder compare error.
The
target cylinder has
one
or
more sectors in which the track number does
not
corres-
pond
with the track
number
of the remainder of the sec-
tors.
The
controller
will
automatically re-try the
read/write
operation once
if
this
is
encountered.
Uncorrectable data error. The disc read
or
verify operation
was terminated because a CRC error was detected in the
data
field. The data
is
still transmitted for the
bad
sector.
To Next Page
Loading...
Need help?
General
