Sony CDU-541 Interface Manual page 30

CDU-541 CD-ROM DRIVE SCSI INTERFACE MANUAL
5
.2.2. MODE SELECT
ColIIJDand
==============================================================================
Bit:
7
6
5
4
3
2 1
o
Byte :
==============================================================================
o I
Operation Code (15h) :
-----1-----------------------------------------------------------------------1
1
I
Logical Uni t Number
I
PF
I
Reserved
I
SP
I
-----1-----------------------------------------------------------------------
2
I
Reserved
-----1-----------------------------------------------------------------------
3 I
Reserved
-----1-----------------------------------------------------------------------
4
1
Parameter List Length
-----1-----------------------------------------------------------------------.
5
I
Control Byte
I
==============================================================================
The MODE SELECT command provides a means tor the initiator to specify
medium, logical unit, or peripheral device parameters to the controller.
The target does not check the value of PF bit.
The save parameters (SP) bit is set to zero because the CD-ROM cannot save
parameters.
The parameter list length specifies the length in bytes of the MODE SELECT
parameter list that will be transferred from the initiator to the controller.
A parameter list length of zero indicates that no data will be transferred.
This condition will not be considered as an error. The block descriptor and
the pages which follow if any must be sent in their entirety. Truncation of a
page due to an incorrect parameter list length will be considered an error.
The command will be terminated with a CHECK CONDITION status. The sense key
is set to ILLEGAL REQUEST and the additional sense code is set to INVALID
FIELD IN PARAMETER LIST.
The MODE SELECT parameter list contains a four-byte header, followed by zero
or one eight-byte block descriptor, followed by zero or more pages.
5-8
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