ACL 4/52 Software Interface Guide
Document 6211225-03
Version 3.0
SCSI Interface
3-19
Mode Select Command (15h)
The Mode Select command provides a means for the host to specify
parameters to the library. The library supports Element Address
Assignment Page, Vendor Unique Page 20h, and Vendor Unique Page
00h.
Table 12: Mode Select
Command
Logical Unit Number
The Logical Unit Number must be set to zero. This field indicates
which logical unit the command should be sent to.
SP - Save Page
When set to zero indicates perform mode select without saving.
When set to one performs mode select and saves it in nonvolatile
memory.
PF
When set to one, the page format field indicates that the Mode
Select Parameters are formatted as specified in the SCSI-2
Standard.
Parameter List Length
Indicates the length of the following parameter list. The list length
should reflect the combined length of all Mode Select Data pages
being sent with the Mode Select command. Mode Select Data
pages are shown in Tables 13, 14, and 15.
Bit/Byte
7
6
5
4
3
2
1
0
0
Operation Code (15h)
1
Logical Unit Number
PF (1)
Reserved (0)
SP
2
Reserved (0000h)
3
4
Parameter List Length
5
Reserved (00h)