Superscript file format

From: Michał Pleban <*lists_at_michau.name*> Date: Sun, 02 Sep 2018 20:23:38 +0200 Message-ID: <5B8C2AAA.8000904@michau.name> · lists_at_michau.name

Hello!

Browsing the CBUG disks, I noticed that almost all text files are meant
to be read with SuperScript, which I don't have. But upon inspection,
they look just like text files with some escape sequences embedded in
various places.

Thus my question: is there any kind of documentation on what these
sequences mean, which would allow to build a converter from SuperScript
something modern (like HTML)?

Regards,
Michau.