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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.
5-34
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