QIO Configuration and Management Manual

Configuring the QIO Subsystem
QIO Configuration and Management Manual—424717-008
2-12
Setting an Alternate Base Address
segment IDs to determine if QIO is running. They are selectable segments, and
each is 8 bytes long.

The QIO space segment (segment ID 2101/32 MB), which is created in flat
memory to provide an aliased memory space, is not needed when QIO is
configured to run in system data space. Requests for space from the IOperm
segment are handled by the main QIO pool segment. This means that the
additional 32 MB of address space provided by the IOperm segment is not
allocated.
To configure QIO to run in system data space, specify the following attribute in the
configuration file:
SegmentType 202
For more information about system data space, see the NonStop S-Series Server
Description Manual or the HP Integrity NonStop NS-Series Server Description Manual.
Setting an Alternate Base Address
If your QIO space is larger than 128 MB for NonStop S-series or larger than 256 MB for
Integrity NonStop NS-series, it must run in flat memory space. To gain more process
heap and process globals space, you can change the base address of the QIO shared
memory segment. This subsection discusses how to change the base address of the
QIO shared memory segment.