CDU-541
CD-ROM
DRIVE
SCSI
INTERFACE
MANUAL
The
logical
block
address
field
specifies
the
logical
block
at
which
the
audio
play
back
operation
shall
begin.
The
transfer
length
field
specifies
the
number
of
contiguous
logical
blocks
that
shall
be
played.
A
transfer
length
field
of
zero
indicates
that
no
audio
operation
shall
occur.
This
condition
shall
not
be
considered
as
an
error.
Any
other
value
indicates
the
number
of
logical
blocks
that
shall
be
played.
NOTE:
A
logical
block
length
not
equal
to
the
sector
size
may
cause
the
starting
logical
block
address
and
the
transfer
length
to
be
adjusted
by
the
target.
In
most
targets,
a
starting
logical
address
that
occurs
within
a
sector
causes
audio
play
to
start
at
the
beginning
of
that
sector.
Many
targets
play
any
partial
audio
sector
beyond
the
end
of
the
requested
transfer
length.
NOTE:
When
the
immideate
bit
in
MODE
SELECT
PAGE
CODE
9
is
set
to
one,
the
command
will
be
terminated
at
the
address
specified
by
the
starting
logical
block
address.
When
it
is
set
to
zero,
the
command
will
be
terminated
at
the
stop
address.
or
an
error
makes
the
command
be
terminated.
5.2.8.
PLAY
AUDIO
MSF
Command
==============================================================================
Bit!
7
6
5
4
3
2
1
o
Byte 1
=============================================================================
o
Operation
Code (47h)
-----1-----------------------------------------------------------------------
1 1
Logical
Unit
Number
1
Reserved
-----1-----------------------------------------------------------------------
2 I Reserved
-----1-----------------------------------------------------------------------,
3 I
Starting
Minutes I
-----1-----------------------------------------------------------------------1
4 I
Starting
Seconds I
-----1-----------------------------------------------------------------------1
5 I
Starting
Frame I
-----1-----------------------------------------------------------------------1
6 I Ending Minutes I
-----1-----------------------------------------------------------------------1
7 I Ending Seconds 1
-----1-----------------------------------------------------------------------1
8 : Ending Frame 1
-----1-----------------------------------------------------------------------1
9 I
Control
Byte 1
==============================================================================
5-18
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