ClassiOS - An Object Pascal Operating System

Tattam Software is redeveloping the PetrOS® IA32 (x86) OS project.  

This operating system is built entirely with the Delphi Compiler - even the boot loader!!  This was achieved by replacing the System.dcu and related units by a custom unit which can run in Ring 0 of the x86 CPU.

You can download the alpha release from our downloads page.

 For assistance and/or discussion go to the Tattam Software Forums