OS/2 Archive

ArcaOS 5.0.3 is (again) the result of many hours of collaborative work to keep up-to-date and to further refine ArcaOS 5.0. Post-install fixes are included, and these will be made available for separate download as part of the ArcaOS 5.0 Support & Maintenance subscription. In the interim, a full download of the refreshed media image is required to obtain all of these fixes and updates.

ArcaOS 5.0.3 includes over 40 updates and fixes since 5.0.2. The USB stick image package (available as a separate download for ArcaOS licensees with current support and maintenance subscription) has also been updated to incorporate the latest changes in ArcaOS 5.0.3.

You have no idea how much effort went into getting this stupid white square on the screen.

In a fascinating example of poor timing, disk images of OS/2 2.0 pre-release level 6.605 from July/September 1991 were missing for over 25 years, only to show up literally one day after the 25th anniversary of the OS/2 2.0 release (big thanks to a very helpful reader!).

Per Arca Noae's revised release schedule, and as announced at Warpstock 2016, Blue Lion (ArcaOS 5.0) moved into beta testing stage today. The first beta release has been made available to the test team, and we anticipate a rigorous round of installation, modifications, formatting, deletion, disk wiping, and all that other fun stuff which accompanies a healthy beta test.

We do not anticipate a public beta cycle nor are we planning a gamma release or an untold number of release candidates. Instead, we fully expect ArcaOS 5.0 to emerge from beta testing at the end of March and to become generally available at that time.

When the Blue Lion project was announced at the American WarpStock in October 2015, the name was only temporary. Following the close of events at WarpStock Europe, Arca Noae managing member Lewis Rosenthal noted in an interview that the final product name for the new OS/2 distribution is ArcaOS 5.0. The significance of the version number relates to IBM OS/2 4.52 - the last maintenance release of the platform released by IBM in 2001.

ArcaOS 5.0 is expected to be released in the fourth quarter of 2016, but Blue Lion remains as a code name, in much the same way "Wily Werewolf" is the code name of Ubuntu 15.10.

Lewis Rosenthal announced at Warpstock that Arca Noae is now licensed by IBM to create a new OS/2 distribution; it is currently codenamed "Blue Lion" and has a tentative release of Q3 2016. It will be based on OS/2 Warp 4.52 (MCP2) and the SMP kernel, with a new installer which does not require floppies or optical media (USB and possibly network installs), the Arca Noae driver updates including ACPI, USB, and MultiMac, and an updated version of SNAP Graphics. Lewis made it clear that there is no agreement between Arca Noae and XEU (formerly Mensys), and they intend to be a better OS/2 distribution than eComstation. Note that eComstation has been effectively dead since December 2013, despite some vague promises earlier this year that 2.2 would finally be released this month.

It was now 1984, and IBM had a different problem: DOS was pretty much still a quick and dirty hack. The only real new thing that had been added to it was directory support so that files could be organized a bit better on the IBM PC/AT’s new hard disk. And thanks to the deal that IBM signed in 1980, the cloners could get the exact same copy of DOS and run exactly the same software. IBM needed to design a brand new operating system to differentiate the company from the clones. Committees were formed and meetings were held, and the new operating system was graced with a name: OS/2.