This episode we are taking a trip back to UNIX world. We're looking at IDRIS, the first clone of UNIX. It was supposed to be highly compatible, but use no code from Bell Labs. IDRIS ran on everything from the Intel 8080 up to the IBM System/370. There was even a version that could run MS-DOS programs. Sound too good to be true? Well, that may be the case.

Selected Sources:

https://archive.org/details/aquartercenturyofunixpeterh.salus_201910/page/n196/mode/1up - A Quarter Century of UNIX

https://github.com/hansake/Whitesmiths-Idris-OS - Co-Idris disk images and executables