I/O Memory Address Jumpers (W10-W13) - IBM RT User's Setup Manual

I/O Memory Address Jum pers (W10-W13)
6-14 Options Installation
When using two Baseband Adapters, you must change the
factory-set I/O memory address of one. Note the configuration of
jumpers W10-W13, and use the following chart to select a different
address.
When using a single Baseband Adapter, you may change the I/O
memory address jumpers W10-W13 to an alternate setting listed
below.
Note: Unsure that memory addresses do not conflict with those of
other adapter options. See "Conflicting Memory Addresses" on
page 1-19.