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CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
The MODE SENSE parameter list contains a four-byte header, followed by one
eight-byte block descriptor, followed by zero or more pages.
Table
5-6:
Mode Sense Parameter List
==============================================================================
Bit:
7
6
5
4
3
2
1
o
Byte :
==============================================================================
o
:
Sense Data Length
:
-----1-----------------------------------------------------------------------1
1
:
Medium Type
:
-----i-----------------------------------------------------------------------i
2
I
Reserved
I
-----1-----------------------------------------------------------------------i
3
i
Block Descriptor Length (08h)
I
==============================================================================
Block Descriptor
=============================================================================-
o
I
I
Reserved
-----i-----------------------------------------------------------------------
1
i
(MSB)
-----\---
2
i
Number of Blocks
-----i---
3
r
(LSB)
-----i-----------------------------------------------------------------------
4
i
Reserved
-----i-----------------------------------------------------------------------
5
i
(MSB)
-----1---
---I
6
I
I
Block Length
I
I
-----i---
7
I
I
---I
(LSB)
i
==============================================================================
Page(s)
=============================================================================-
o
Reserved
Page Code
1
Page-Specific Parameter Length
2
Page-Specific Parameters
n
====:========================:=======:========================================
The medium type is set to zero to indicate the default disc is CD-ROM.
The block descriptor length is set to 08h.
The block descriptor speci:ies the medium characteristics for the whole
disc.
The number of blocks field indicates the number of contiguous logical blocks
that have the block length specified in the block descriptor.
A value of zero
indicates the whole disc has the block length specified.
5-13
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