Sony CDU-541 Interface Manual page 62

CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
Table 5-17: Sub-Channel Q Data LBA Format
==============================================================================
Bitl
Byte
1
7
6
5
4
3 2 1
a
==============================================================================
a
1
2
3
4
5
6
7
8
I
Reserved
1
Control
1
-----------------------------------------------------------------------1
Track Number :
-----------------------------------------------------------------------1
Index Number :
-----------------------------------------------------------------------1
{MSB} :
Relative CD Address
___ I
1
1
1
---I
(LSB) :
-----------------------------------------------------------------------1
(MSB)
1
Absolute CD Address
---I
I
I
---I
(LSB) :
==============================================================================
The control bits are defined in Table 5-24.
The Track Number specifies the current track number.
The Index Number specifies the index number in the current track.
The relative CD address returns the equivalent logical address of the
relative physical location from the beginning of the current track.
The absolute CD address returns the equivalent logical address of the
absolute physical location from the beginning of the disc. If the first track
on the disc is CD-ROM data the logical address returned is adjusted for the
two second offset.
5-40