SHOW-TERMCAP SHOW-TERM-ESC-KEYS SIGABRT
SHOW-TERMCAP ( -- )   for debugging
<PFE-TERM>
print the termcap strings used for input and output may give hints about what is wrong if the terminal seems to miss some functionality

reference: p4_show_termcap in ../src/term.c:0324, export CO SHOW-TERMCAP