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Command
Modifier
Bits
11-8
Subs-
cript
7-0
Function
0000
0
Reset
Interface Attention,
Standard
Status
and
Standard
Optical
Status (B2s
0-11)
0001
0
Reserved
0010
0
Stop
Spindle
Motor
0011
0
Start
Spindle
Motor
0100
mm
Lock
Cartridge
0101
Unlock
Cartridge
0110
mm
Eject Cartridge
0111
Not Implemented
1000
0
Not Implemented
1
Magnet
Control
(MO)
-
Write
& Read
2
•
Erase
1001
0
to
Reserved
1010
mm
1011
Select
PLL
-
MO
mode
1
-ROMr7X5de
1
1
00
0
Spiral
Operation
Off
1101
0
Spiral
Operation
On
1
1 1
X
0
Reserved
Table
5.17
:
Optical Disk Control
Modifier
Bits
5.3.12
INITIATE
DIAGNOSTICS
(1000)
This
command
causes
the drive
to
perform
internal
diagnostics.
COMMAND
COMPLETE
indicates
the completion
of
the diagnostics.
ATTENTION
with
COMMAND
COMPLETE
indicates that
a
fault
was
encountered
and
status
should
be
requested
to
determine
the
proper course
of action.
The
command
modifier
bits
are
set to
zero
to
perform
the
standard
diagnostics.
Alternatively,
these
bits
are
used by
the device
to
invoke
alternate
vendor
diagnostics.
See
Table
5.18.
The
alternative
diagnostic routines
are
numbered
in
order beginning with
x'OV,
and
command
reject
issued
when
any unimplemented
routines are
requested.
If
the
alternate diagnostics
are
not
supported by
the
device then
the
command
modifier
bits
are
ignored.
The
diagnostic
parameter
bits
are
used
to
modify
the
routine
per
vendor
specifications,
but
ail
routines
execute
when
a
default
value
of
zero
is
present.
15 14 13 12
11
10
9
8
7
6
5
4
3
2
n
p
CMC
function
Diagnostic No.
Diagnostic
Parameter
X
Table
5.18
:
Diagnostic
Parameter
Bits
Section 5: Drive
interface
Explanation
41
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