Free42 is a HP-42S RPN scientific calculator simulator.
The HP-42S was manufactured from 1988 until 1995 by Hewlett-Packard.
The Free42 program is a complete rewrite and contains no HP code whatsoever.
Has a realistic calculator display, and looks great!
The Porteus module for free42 2.5.15 (3MB download) is for Porteus x86_64 and may be download vis this link:
https://my.pcloud.com/publink/show?code ... 0TY4OXRILX
A pdf manual is also available from here:
https://my.pcloud.com/publink/show?code ... SiuyeT6C9kT