UNIX(r) System V Release 4.0
Sun Microsystems Inc.   SunOS 5.6       Generic August 1997

cd
mkdir terminfo
cd terminfo

infocmp -I vt52   > z88_terminfo.src
infocmp -I vt52  >> z88_terminfo.src
infocmp -I vt100 >> z88_terminfo.src

Remove #comment lines and edit first header line of z88_terminfo.src to:
z8|z88|Cambridge Z88 portable (like dec vt52 but 8-line screen),

setenv TERMINFO ~/terminfo
tic z88_terminfo.src

Edit .login to include the line:
setenv TERMINFO ~/terminfo