Pause Command - Sony CDU-541 Interface Manual

CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
The block length specifies, in bytes, the logical block size in use by the
controller. This is applicable to whole disc except those tracks that are
audio. The defaul t block length is 2048 and is returned if defaul t values are---... .. /
requested. The current block length is returned if current values are
requested. A block length of FFh FFh FFh is returned if changeable values
are requested. See Table 5-4 for valid values.
Pages are returned following the block descriptor if requested. Each page
has a header defining the page code and the page length. Following the header
are the page parameters. The page length value is the number of bytes that
follow the page length byte and does not include the header. The pages are
defined in Section 5.3.
5 .2.4. PAUSE
Command
==============================================================================
Bitl
Byte
I
7
6
5
4
3
2
1
o
========================================================================
o
Operation Code (C5h) 1
1
-----------------------------------------------------------------------1
1
Logical Uni t Number
I
Pause
I
Reserved
I
-----------------------------------------------------------------------1
2
Reserved
I
-----1-----------------------------------------------------------------------
3
1 -
Reserved
-----1-----------------------------------------------------------------------
4
1
Reserved
-----1-----------------------------------------------------------------------
5 :
Reserved
-----1-----------------------------------------------------------------------
6
1
Reserved
-----1-----------------------------------------------------------------------
7
1
Reserved
I
-----1-----------------------------------------------------------------------1
8
1
Reserved
1
-----1-----------------------------------------------------------------------1
9 I
Control Byte
1
==============================================================================
The PAUSE command requests that the target start/stop the current audio
play operation.
A pause bit of one indicates the drive will enter the hold track state with
the audio output muted after the current audio block is played. A pause bit
of zero indicates the drive will release the pause and begin play at the
block following the last block played.
5-14