Interrupt Selection Jumper (W9) - IBM RT User's Setup Manual

In te rru p t Selection Ju m p er (W9)
Set the in te rr upt level of the Interrupt Selection Jumper to any of
the available in te rru pt levels except interr upt 6, which is used by
the diskette drives. If you are using two Baseband Adapters,
ensure th a t different int erru pt levels have been selected. See
"Adapter Conflicts" on page 1-19.
Note:
The factory setting for this jumper is interrupt 9.
AJZIF142
6-13
Section 6. Co mm unication a nd Network Adapter Options