Honeywell Solaris 7980g Quick Start Manual page 8

RS485 Interface
The RS485 interface defaults to port 5B. If you have an IBM POS
terminal using port 9B, scan the appropriate code below to
program the terminal, then power cycle the cash register. If you
have an IBM POS terminal using port 17, scan IBM Port 17
Interface barcode below.
IBM Port 9B HHBCR-1
Interface
IBM Port 9B HHBCR-2
Interface
IBM Port 17 Interface
Note: For additional RS485 interface selections, see the User
Guide for your product at our website, sps.honeywell.com.