IBM RT PC Options Installation page 192

TNL SN20-9864 (May 1987) to 75X0217
IBM 8/370 Host Interface Adapter
You can install one IBM Sj370 Host Interface Adapter in an IBM 6150.
You cannot install this adapter in an IBM 6151 System Unit. See
"Federal Communications Commission (FCC) Statement" on page v.
Set the DMA Level Jumpers for level 5 as shown.
Warning: If the IBM RT PC 5080 Attachment Adapter and IBM Sj370
Host Interface Adapter are used together, ensure that their DMA channel
settings do not conflict with other cards in the IBM 6150. Operating the
IBM RT PC 5080 Attachment Adapter and Sj370 Host Interface
Adapter at the same DMA level via software enabling is not
recommended.
DMA Level Jumper
20 Pin
Connector
Installing: You may install this adapter in slots 2, 4, 5, 7, or 8 in an
IBM 6150. See the system unit diagram to locate the adapter slots.
Section 8. Additional Options 8-9