Interrupt Selection Jumper (W9) - IBM RT PC Options Installation

Interrupt Selection Jumper (W9)

Set the interrupt level of the Interrupt Selection Jumper to any of
the available interrupt levels except interrupt 6, which is used by
the diskette drives. If you are using two Baseband Adapters, ensure
that different interrupt levels have been selected. See "Adapter
Conflicts" on page 1-19.
Note: The factory setting for this jumper is interrupt 9.
Section 6. Communication and Network Adapter Options 6-13