The adventure program files were the same, no matter what platform they were running on. Only the Interpreter was different on each platform.
Shades of Java you might think!
Anyway, the BTOS/CTOS "Infocom Interpreter 1.4" is kindly supplied by Geoff Roynon, who converted it into BTOS Pascal from BPL.
And it works under CTOS III !
The release notes are here.
The Infocom Interpreter, including source code is here.
You'll need to change the .ZIP to a .RUN. How to unzip the file is
explained here!
A screenshot of startup screen is here.
A good Infocom related website, with game download links, is here.