Sony CDU-541 - Page 35

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