This is vi version 3.6 taken from 4.0BSD. It had been released in November 1980.

The software is downloaded with

git clone https://github.com/n-t-roff/ex-3.6.git

and can be kept up-to-date with

git pull

Some configuration (e.g. installation paths) can be done in the makefile. For compiling on BSD, Linux and Solaris autoconfiguration is required:

$ ./configure

The software is build with

$ make

and installed with

$ su
# make install
# exit

All generated files are removed with

$ make distclean

• PAGE-UP, PAGE-DOWN keys may work on most terminals by putting map ^[[5~ ^B and map ^[[6~ ^F into ~/.exrc.
• The documents viin.pdf and exrm.pdf describe vi version 3.6 in detail.