http://x3270.bgp.nu/Unix/c3270-man.html https://x3270.miraheze.org/wiki/C3270
Keymaps support files or resources. Unable to get files to work (description of how it works is below)
create a file in home directory .c3270pro.
To see what keys you need, run c3270 -trace tpx (if tpx is a host - explained below). Then tail -F /tmp/x3trc.<random num>.
Files supposedly go in confDir
See confDir by running c3270 and typing set:
confDir: /opt/homebrew/Cellar/x3270/4.3ga8/etc/x3270
Go to config dir and edit ibm_hosts, for example:
#tpx primary tpxdev.mainframe.net keymap(default)
tpx primary tpxdev.mainframe.net
Then you can run c3270 tpx.