IBM iSeries 270 Service Manual page 261

Notes:
1. The Model 820 system unit contains two system PCI busses. Each PCI bus has one multi-adapter
bridge.
2. In the Model 820 card position table the first of the two busses in the system unit is bus 0001 and the
second bus in the system unit is designated as "yyyy".
3. The bus connected to card positions C01 - C06 is bus number 0001. The other bus in the system unit
is not required to have a contiguous bus number.
4. There is an embedded CFIOP in the system unit backplane in position MB1. This CFIOP is in the C01
- C06 multi-adapter bridge domain.
5. C12 is required to be a CFIOP.
Analyze hardware problems
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