Perle Systems RIO 5500036-17 - Manual (Page 310)

RIO Remote I/O System User Guide
Windows NT troubleshooting
Page 310
Clashing Interrupts
Interrupt clashes can occur on both PCI and ISA machines.
On PCI machines, clashes are likely when the interrupt level for an ISA board has not been
reserved in the system. Use the PCI BIOS setup program to reserve the ISA interrupt level
that will be used by the card, or select polled mode operation.
(RIO Host ISA can use interrupts 9,11,12 or 15.)
On ISA machines, you will have to reconfigure the RIO software and select a new interrupt,
or polled mode. RIO HOST ISA cards can use interrupt 9, 11, 12 or 15.