QIO Configuration and Management Manual

Configuring the QIO Subsystem
QIO Configuration and Management Manual—424717-008
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Configuring QIO to Reside in System Data Space
Note the following about QIO in system data space:

The starting address of the QIO is not fixed in system data space as it is in the
default flat space memory. The starting address is stored in a fixed location in
system globals (QIO_FLATSEG_SGADDR).

The QIO segment identifications 2100 and 2101 are created as dummy selectable
segments. This allows for compatibility with programs that may look for these
Figure 2-3. QIO Memory in Global Privileged Space (Integrity NonStop NS-Series
Servers)
00000000.08000000
QIO Shared Memory
Segment
(Default 256 MB
Max 512 MB)
Flat Segment Memory
Space
Base Addresses
00000000.80000000
Region 7 (Global
Privileged Space)
VST017.vsd
Variable
Address
Region 0 (User
Addressable Data
Space)
Process Heap and
Process Globals
00000000.50000000
FFFFFFFF.80000000