RS/6000 AIX adapter number conventions
The location code for an adapter consists of two pairs of digits with the format AA-BB, as follows:
AA identifies the location code of the drawer that contains the adapter card, as follows
If AA is 00, the adapter card is located in the CPU drawer or system unit, depending on the type of system.
If AA is not 00, the card is located in an I/O expansion drawer, as follows:
The first digit identifies the I/O bus; 0 corresponds to the standard I/O bus and 1 corresponds to the optional I/O bus.
The second digit identifies the slot on the I/O bus.
BB identifies the I/O bus and the slot that contains the card, as follows:
The first digit of BB identifies the I/O bus that contains the adapter card, as follows:
If the card is in the CPU drawer or system unit, 0 represents the standard I/O bus and 1 represents the optional I/O bus. If the card is in an I/O expansion drawer, this digit is 0.
The second digit identifies the slot number on the I/O bus (or slot number in the I/O expansion drawer) that contains the card.
The following are examples of adapter numbers:
00-00 identifies the Standard I/O Planar.
00-05 indicates an adapter card that is in slot 5 of the standard I/O board. The board is in either the CPU drawer or the system unit, depending on the type of system.
00-12 indicates an adapter card that is in slot 2 of the optional I/O bus in the CPU drawer.
18-05 indicates an adapter card that is located in slot 5 of an I/O expansion drawer. The drawer is connected to the asynchronous expansion adapter that is located in slot 8 of the optional I/O bus in the CPU drawer.