Table 48. IOP, IOA, and device address information for Models 830, SB2 System Unit with
FC 9074 Base I/O Tower (continued)
Position Possible Failing
Component
DSA (BBBBCcbb)
Note: IOA and
device DSA’s will not
follow the rules
below if the IOA is
manually reassigned
after IPL.
Unit Address
D06 Disk Unit The disk unit has the
same DSA as the IOA
attached to the
internal cable
labelled ″R-2″.
x00300FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D07 Disk Unit x00400FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D08 Disk Unit x00500FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D09 Disk Unit x00600FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
D10 Disk Unit x00700FF (where x is
the same as the first
character of the
xFFFFFFF IOA Unit
Address)
Locations and Addresses
Chapter 5. Locations, Addresses, and Part Listings 753