Avago Technologies LSI53C896 - Manual (Page 152)

4-40 Registers
Version 3.3 Copyright © 1998–2003 by LSI Logic Corporation. All rights reserved.
Register: 0x0A
SCSI Selector ID (SSID)
Read Only
VAL SCSI Valid 7
If VAL is asserted, then the two SCSI IDs are detected
on the bus during a bus-initiated selection or reselection,
and the following encoded destination SCSI ID bits are
valid. If VAL is deasserted, only one ID is present and the
contents of the encoded destination ID are meaningless.
R Reserved [6:4]
ENID Encoded Destination SCSI ID [3:0]
Reading the SCSI Selector ID (SSID) register
immediately after the LSI53C896 SCSI function is
selected or reselected returns the binary-encoded SCSI
ID of the device that performed the operation. These bits
are invalid for targets that are selected under the single
initiator option of the SCSI-1 specification. This condition
is detected by examining the
VAL bit.
7 6 4 3 0
VAL R ENID
0 0 0 0 0 0 0 0