CDU-541
CD-ROM
DRIVE
SCSI
INTERFACE
MANUAL
The
PLAY
MSF
command
requests
that
the
target
output
the
audio
signals
starting
at
the
specified
starting
address
and
continue
the
audio
play
operation
until
the
specified
ending
address
is
detected.
The
audio
signals
are
output
as
specified
by
the
audio
control
parameters
in
MODE
SELECT
PAGE
CODE
9. The number
in
these
fields
is
hexadecimal.
The
Starting
minutes,
seconds,
frame
specify
the
starting
address
in
absolute
time.
The Ending
minutes,
seconds,
frame
specify
the
ending
address
in
absolute
time.
If
the
ending
address
is
less
than
the
starting
address
a
CHECK
CONDITION
status
is
returned.
The
sense
key
is
set
to
ILLEGAL
REQUEST
and
the
additional
sense
code
is
set
to
ILLEGAL
VALUE
IN
COMMAND
DESCRIPTOR
BLOCK.
The
status
returning
condition
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
statues
byte
when
reading
operation
of
data
transfer
length
specifird
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
address
equal~
the
ending
address
this
command
this
command
seeks
to
the
specified
address
and
enters
the
hold
track
state.
The
drive
is
in
a
pause
condition,
issuing
a
PAUSE
command
with
the
pause
bit
set
to
zero
will
begin
audio
play.
----/
5.2.9.
PLAY
AUDIO
TRACK/INDEX
Command
==============================================================================
Bitl
Byte
I
7
6
5
4
3
2 1
o
==============================================================================
o I
Operation
Code
(48h) I
-----1-----------------------------------------------------------------------1
1 '
Logical
Uni t
Number
I
Reserved
I
-----------------------------------------------------------------------1
2
Reserved
I
--------------------------------------------------------------------~--I
3
Reserved
I
-----------------------------------------------------------------------1
4
Starting
Track
I
-----------------------------------------------------------------------\
5
Starting
Index
-----------------------------------------------------------------------
6
,
Reserved
-----,-----------------------------------------------------------------------
7
,
,
,
Ending
Track
-----,-----------------------------------------------------------------------
8
,
,
,
Ending
Indexe
___
~_I
______
------------------------------------------
______________________
_
9
I
I
I
Control
Byte
5-19
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