Sony CDU-541 - Page 56

CDU-S41 CD-ROM DRIVE SCSI INTERFACE.MANUAL
5 .2. 19. READ HEADER Command
==============================================================================
Bitl
Byte 1
7
6
5
4
3
2 1 o
==============================================================================
a : Operation Code (C3h) 1
-----i-----------------------------------------------------------------------1
1 I Logical Unit Number: Reserved 1
-----------------------------------------------------------------------,
2 (MSB)
3
Logical Block Address
4
5 (LSB) 1
-----------------------------------------------------------------------1
6 1 Reserved 1
-----1-----------------------------------------------------------------------1
7 1 (MSB) 1
-----1--- Allocation Length ---I
8 I (LSB) 1
-----1-----------------------------------------------------------------------1
9 I Control Byte 1
==============================================================================
The READ HEADER command requests that the target return the CD-ROM data
header for the specified logical block.
See the READ command for exception handling. If the logical block size is
less than the physical block size the CD-ROM data header will be returned
for the physical block which contains the logical block requested.
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