Play Msf Comjland - Sony CDU-541 Interface Manual

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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
5.2.10.
PLAY MSF Command
==============================================================================
Bitl
Byte
1
7
6
5
4
3
2 1
o
;=============================================================================
o
I
Operation Code (C7h)
I
-----1-----------------------------------------------------------------------1
1
I
Logical Uni t Number
I
Reserved
1
-----1-----------------------------------------------------------------------1
2
I
~eserved
I
-----1-----------------------------------------------------------------------:
3 :
Starting Minutes
1
-----:-----------------------------------------------------------------------,
4
I
Starting Seconds
-----1-----------------------------------------------------------------------
5 1
Starting Frame
-----:-----------------------------------------------------------------------
6
1
Ending Minutes
-----1-----------------------------------------------------------------------
7 I
Ending Seconds
-----1-----------------------------------------------------------------------
8
1
Ending Frame
-----1-----------------------------------------------------------------------
9 I
Control Byte
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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.
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.
This command returns the status byte when the address requested is found.
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 equals the ending address this command
seeks to the specified address and enters the hold track state.
in a pause condition, issuing a PAUSE command with the pause bit
will begin audio play.
5-21
this command
The drive is
set to zero