CDU-541
CD-ROM
DRIVE
SCSI
INTERFACE
MANUAL
5
.2.2.
MODE
SELECT
ColIIJDand
==============================================================================
Bit:
7
6
5
4
3
2
1
o
Byte :
==============================================================================
o I
Operation
Code (15h) :
-----1-----------------------------------------------------------------------1
1 I
Logical
Uni t
Number
I
PF
I Reserved I
SP
I
-----1-----------------------------------------------------------------------
2 I Reserved
-----1-----------------------------------------------------------------------
3 I Reserved
-----1-----------------------------------------------------------------------
4 1
Parameter
List
Length
-----1-----------------------------------------------------------------------.
5 I
Control
Byte
I
==============================================================================
The
MODE
SELECT
command
provides
a means
tor
the
initiator
to
specify
medium,
logical
unit,
or
peripheral
device
parameters
to
the
controller.
The
target
does
not
check
the
value
of
PF
bit.
The
save
parameters
(SP)
bit
is
set
to
zero
because
the
CD-ROM
cannot
save
parameters.
The
parameter
list
length
specifies
the
length
in
bytes
of
the
MODE
SELECT
parameter
list
that
will
be
transferred
from
the
initiator
to
the
controller.
A
parameter
list
length
of
zero
indicates
that
no
data
will
be
transferred.
This
condition
will
not
be
considered
as
an
error.
The
block
descriptor
and
the
pages
which
follow
if
any must be
sent
in
their
entirety.
Truncation
of
a
page due
to
an
incorrect
parameter
list
length
will
be
considered
an
error.
The
command
will
be
terminated
with
a
CHECK
CONDITION
status.
The
sense
key
is
set
to
ILLEGAL
REQUEST
and
the
additional
sense
code
is
set
to
INVALID
FIELD
IN
PARAMETER
LIST.
The
MODE
SELECT
parameter
list
contains
a
four-byte
header,
followed
by
zero
or
one
eight-byte
block
descriptor,
followed
by
zero
or
more
pages.
5-8
"----....--"
To Next Page
Loading...
