PCjs Machines

SCO Xenix 386 v2.2.3b

PCjs has archived an original copy of what may be the oldest surviving 386-based PC operating system.

Previously, that honor went to (a reconstructed copy of) SCO Xenix 386 v2.2.3c, as explained in this series of OS/2 Museum posts:

• The XENIX 386 2.2.3 Mystery (January 3, 2013)
• The XENIX 2.2.3 Mystery, Continued (January 18, 2013)
• Oldest Surviving 386 PC OS? (March 9, 2017)
• What a Coincidence (March 11, 2017)
• Tales From the Xenix Crypt (March 13, 2017)

Also see this series of SoylentNews posts:

• Restoring Xenix 386 2.2.3c (Part 1)
• Xenix 2.2.3c Restoration: No Tools, No Problem (Part 2)
• Xenix 2.2.3c Restoration: Damage Mapping (Part 3)
• Xenix 2.2.3c Restoration: Xrossing The X (Part 4)

When prompted, use the following serial number and activation key:

Serial number:  pcjs.org!
Activation key: ylwbrzkd

NOTE: The PCjs SCO Xenix 386 machines are still being debugged, so don’t expect the operating system to work here quite yet.

[GitHub Source]