IBM SA38-0512-03 manual Location code is Defined as

of 0-9, and A-F (hex numbers). This allows the location code to uniquely identify multiple adapters on individual PCI cards.

For pluggable ISA adapters, CD is equal to the order the ISA cards defined/configured either by SMIT or the ISA Adapter Configuration Service Aid.

For integrated ISA adapters, CD					is equal to a unique		code identifying the ISA
adapter. In most cases this is					equal	to the adapter's physical location code.
where		a	physical	location code	is not	available, CD is be FF.
EF	is	the	connector	ID. It is	used to	identify the	adapter's connector that a
is	attached to.

GH is used to identify a port, device, or FRU. For example:

Ÿ For async devices GH defines the port on the fanout box. The values are 00 15.

Ÿ For a diskette drive H defines which diskette drive 1 or 2. G is always

Ÿ For all other devices GH is equal to 00.

For	integrated adapter, EF-GH		is the same as the definition for a	pluggable ada
For	example, the location code for a diskette drive is 01-D1-00-00. A			second
diskette		drive is 01-D1-00-01.
For	SCSI	the location code is	defined as:
	AB-CD-EF-G,H

Logical Unit address of the SCSI Device

Control Unit Address of the SCSI Device

Connector ID

devfunc Number, Adapter Number or Physical Location Bus Type or PCI Parent Bus

Where AB-CD-EF are the same as non-SCSI devices.

G defines the control unit address of the device. Values of 0 to 15 are vali

H defines the logical unit address of the device. Values of 0 to 255 are vali

There is also a bus location code that is generated as '00-XXXXXXXX' where XXXXXXXX is equivalent to the node's unit address.

Chapter 5. Location Codes (Model 15-50 only)