IBM R/S6000 7012 300 Series Operator's Manual page 27

Pair
GH
or or
GHH
or
G,HHH
1-12
Operator Guide
Value Description
For devices other than those listed here
00
Port addresses for 8-port async, 16-port async, and 16-port
00
thru concentrator distribution boxes.
15
Diskette drive 1
01
Memory SIMM (J12) on the system board
Memory SIMM (J13) on the system board
Memory SIMM (J17) on the system board
Memory SIMM (J18) on the system board
SCSI address and logical unit number of the device.
00
thru
FF
SCSI address and logical unit number of the device shown in
000
thru hexadecimal.
FFF
SCSI address and logical unit number of the device shown in
0,000
thru decimal.
Note: When a comma appears between the G and H, digits
F,255
appearing to the right of the comma are represented in decimal.
Note: See the Appendix A to determine physical location.