HP C2488A Technical Reference Manual page 128

Change WideSCSllD
The CHANGE WIOE SCSI 10 command instructs the Target to change its address to that
supplied in the SCSI 10 field. The Target will accept the command at any time, but will not
change the 10 until a SCSI bus reset is performed. This allows the Initiator to change the
IO's of up to seven targets without duplication.
If power is lost, the Target's SCSI ID source will revert to the address pinsets when power is
restored.
Rezero Unit Command Descriptor Biock (COB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
00
Opcode
=
C2H
01 Logical Unit Nwnber
I
Reserved
02-03 Reserved
04 Reserved
I
IDCF
I
SCSI ID
05 Control Byte
IOCF (ID Control Field).
If IOCF = 0:
The SCSI 10 field is ignored and the drive obtains its 10 from the address
pinsets at the next bus reset.
If IDCF
=
1:
The drive obtains its ID from the SCSI ID field in byte 4 at the next bus
reset.
SCSI ID. Provides the new SCSI address: MSB
=
bit 3; LSB
=
bit O.
B·8
Vendor Unique Command DeSCriptions
DRAFT
1/18/93 09:58