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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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