IBM X.25 - Manual (Page 57)

Changing Your CONFIG.SYS File
If OS/2 and Communications Manager/2 (CM/2) are being used, one
line of the CONFIG.SYS file must be modified (using a text editor) to
specify the location of the ICAPARM.PRM file. Change
CONFIG.SYS as follows, but substitute your specific drive paths:
Change: DEVICE=C:\CMLIB\ICARICIO.SYS
To: DEVICE=C:\CMLIB\ICARICIO.SYS C:\CMLIB\ICAPARM.PRM
Note: Make this change after CM/2 is configured. Later, if CM/2 is
configured again, do not have it replace the CONFIG.SYS
file. However, if you must let CM/2 change CONFIG.SYS to
add new devices, just edit CONFIG.SYS again to replace the
ICAPARM.PRM parameter.
Ctrl+Alt+Del Reset Considerations
The PCI co-processor adapter does not detect a Ctrl+Alt+Del reset
operation.
Selecting an Interrupt Level for the PCI Co-Processor
Adapter
A Realtime Interface Co-Processor (ARTIC) adapter, which includes
the PCI co-processor adapter, can be configured to operate on
several hardware interrupt levels. An ARTIC adapter and its
software can support shared interrupts. Note that even though some
other hardware adapters support interrupt sharing, their supporting
software does not. The interrupt level for the PCI co-processor
adapter is assigned by PCI BIOS.
Special Configuration Information A-5