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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
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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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