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Sony CDU-541 - Page 42

Sony CDU-541
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CDU-541
CD-ROM
DRIVE
SCSI
INTERFACE
MANUAL
==============================================================================
The
PLAY
TRACK/INDEX
command
requests
that
the
target
play
audio
starting
at
the
specified
starting
track
and
index
for
the
specified
ending
track
and
index.
The
audio
is
output
as
specified
by
the
audio
control
parameters
in
MODE
SELECT
PAGE
CODE
9.
The
starting
track
field
specifies
the
track
number
of
the
starting
audio
track.
The
starting
index
field
specifies
the
index
number
within
starting
track
at
which
the
audio
play
operation
shall
begin.
Valid
values
for
the
track
are
Ih
to
63h( 1
to
99
) and
for
the
index
are
only
1
NOTE:
The
current
firmware
in
the
controller
only
supports
a
starting
index
of
one.
The
ending
track
field
specifies
the
track
number
of
the
ending
audio
track.
The
ending
index
specifies
the
index
number
within
the
track
after
which
the
audio
play
operation
shall
stop.
The
ending
track
of
FFh
is
valid,and
the
play
operation
continues
until
the
lead-out
or
non-audio
track
is
detected,
or
an
error
occurs.
IMPLEMENTORS
NOTE:
A
typical
audio
track
for
music
has
only
one
index
number
(i.e.
the
number
of
indexes
is
equal
to
one.)
The number
of
indexes
within
a
track
in
not
obtainable
from
data
in
the
table
of
contents.
The
status
returning
conditioD
depends on
the
Immd
bit
of
MODE
SELECT
page
code
9. The
Immd
bit
in
MODE
SELECT
page code 9
of
one
requests
that
this
command
return
the
status
byte
when
the
address
requested
is
found.
The
Immd
bit
in
MODE
SELECT
page
code 9
of
zero
requests
that
this
command
return
the
statuas
byte
when
reading
operation
of
data
transfer
length
specifird
by
byte
7 and 8 above
is
completed,
or
an
error
occurs.
If
the
address
is
not
found ,
or
if
the
ready
condition
does
not
exist,
or
if
the
address
is
not
within
an
audio
track,
a
CHECK
CONDITION
status
will
be
returned
and
the
appropriate
sense
key
set.
If
the
starting
track
is
greater
than
the
ending
track,
a
check
condition
status
will
be
returned.
The
sense
key
will
be
set
to
ILLEGAL
REQUEST.
If
both
are
equal,
the
play
operation
is
executed
on
the
track
only.
5-20

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