Category Archives: News

AMouse driver package v4.01 released

Arca Noae is pleased to announce the immediate availability of a new release of our AMouse driver package.

This is a major update with significant parts of the code rewritten. If you have ArcaOS version 5.1.1 then you already have this update. This update is now available for those who don’t have ArcaOS 5.1.1. The highlights of this update are:

Better handling of missing or emulated 8042.
Automatic mouse integration for VMware and Virtual Box.
Better handling of some PS/2 mice.
Better handling of some touchpoint devices.
Better NLV support.
Miscellaneous other minor fixes.

More information about the AMouse driver may be found in the wiki.

If you have ArcaOS, this driver package is available for download from the Arca Noae website as part of the Support & Maintenance subscription for your ArcaOS product. Please log into your account and see your ArcaOS order details page to access your software.

If you have an Arca Noae OS/2 & eCS Drivers and Software Subscription, this driver package is available for download from the Arca Noae website as part of your Arca Noae OS/2 & eCS Drivers and Software Subscription. Please log into your account in order to access your software.

If you are still running OS/2 and/or eComStation systems and haven’t yet purchased a software subscription, this is a great reason to do so now. It may also be a good time to consider moving up to ArcaOS.

Driver updates now available

MultiMac With the release of ArcaOS 5.1.1, several drivers have been updated. These updates are already included in ArcaOS 5.1.1, but if you are not updating to ArcaOS 5.1.1 you can still take advantage of some of the new driver updates. They are now available as part of the Support & Maintenance subscription for your ArcaOS product, and in the Arca Noae OS/2 & eCS Drivers and Software Subscription, Please log into your account and visit your ArcaOS Download Center to access your software. Specifically, these updated packages are:

USB 12.17 (updated from 12.16)
Panorama 1.20 (updated from 1.19)
ACPI 3.23.18 (updated from 3.23.17)
Multimac

These releases include minor fixes and enhancements over their previous versions, and while recommended, are not considered critical updates. Again, if you have ArcaOS 5.1.1, you already have all of these updates. Here are the highlights of what’s new:

USB 12.17

Enhanced USBMOUSE to handle more mouse features.

Panorama 1.20

Enhanced to select font size for ArcaOS installer.
NLV enhancements.

ACPI 3.23.18

Fixed acpidump to work on more systems.

MultiMac

Minor updates to E1000B 1.1.9, MMAE 1.1.9, MMRE 1.1.10, and MMJME 1.1.4

If you are still running OS/2 and/or eComStation systems and haven’t yet moved up to ArcaOS, this is a great reason to do so now. If you’ve already made the switch, but haven’t renewed renewed your support subscription, this is also a good time. Thinking of upgrading your current ArcaOS 5.0 installation? Now is also a good time.

If you have an Arca Noae OS/2 & eCS Drivers and Software Subscription, these driver package are available for download from the Arca Noae website as part of your Arca Noae OS/2 & eCS Drivers and Software Subscription. Please log into your account in order to access your software.

ArcaOS 5.1.1 now available

Arca Noae is proud to announce the general availability of ArcaOS 5.1.1 in English, German, Spanish, and Russian.

ArcaOS 5.1.1 continues to support installation on the latest generation of UEFI-based systems, as well as the ability to install to GPT-based disk layouts. This enables ArcaOS 5.1.1 to install on a wide array of modern hardware. Of course, ArcaOS 5.1.1 is just as much at home on traditional BIOS-based systems, offering enhanced stability and performance across both environments.

This release is free of charge to those with active ArcaOS 5.1 Support & Maintenance subscriptions, and there is no charge for requesting additional language ISOs (though your total number of ArcaOS 5.1 installations may not exceed the number of ArcaOS 5.1 licenses you have).

ArcaOS 5.1.1 can be used for new installs or to upgrade any prior English version of ArcaOS 5. If installing from USB stick, the USB install stick may be created using any major operating system at hand (Windows, Linux, MacOS, and of course, OS/2, eComStation, and ArcaOS). Once built, the USB stick can be inserted into any USB port in the target system to boot into the ArcaOS installer/updater in either UEFI or traditional BIOS mode (alternatively, the DVD image may be burned to physical media and also booted to either UEFI or traditional BIOS systems).

For a complete list of updates in this release, see the ArcaOS wiki. Be sure to review the README.TXT, as well, as this contains critical information to ensure that you get up and running fast, and includes tips for getting things adjusted right away.

This upgrade is available at a steep discount with your valid ArcaOS 5.0 Support & Maintenance subscription (and your remaining subscription time will be added to the included support term). To download your fresh ISO, simply visit your customer portal page and select the Download Center link on the navigation panel to the left. From there, click the “Upgrade to 5.1” button, and proceed to checkout.

If your ArcaOS 5.0 Support & Maintenance subscription has already expired, you may still upgrade at less than the cost of a new ArcaOS 5.1 license. Follow the procedure above to order your upgrade, and the discount will be reflected in your cart.

New ArcaOS 5.1.1 license purchases are initially built as English. To request a different language, simply visit your Download Center, select the Build ISO Again button, and choose your language.

Need more convincing? How about a commercial operating system which doesn’t spy on you, does not report your online activity to anyone, and gives you complete freedom to choose the applications you want to use, however you want to use them? How about an operating system which isn’t tied to any specific hardware manufacturer, allowing you to choose the platform which is right for you, and fits perfectly well in systems with less than 4GB of memory or even virtual machines?

Arca Noae is committed to continuing the development, support, maintenance, and refinement of the OS/2 platform. The next release of ArcaOS is already in the works. The future looks bright for Arca Noae and ArcaOS!

Server status update for February 14, 2025

Currently, email and our bug tracker are experiencing considerable traffic load. This includes subscription renewal notifications, new ISO download notifications, as well as incoming contact submissions from our contact page.

We are working to mitigate the flow of non-legitimate traffic, and will post an update when the matter has been resolved.

Downloads of subscription content should not be impacted in any way.

ArcaOS named Best Alternative OS of 2025 by TechRadar!

It is always gratifying to receive acclaim from our peers and the educated press. It seems that TechRadar has listed ArcaOS as #1 in their list of Best alternative operating systems of 2025, albeit with some slight misstatements in their overview (which we have brought to their attention).

One of the points which is specifically incorrect is the negative notion that ArcaOS is “for older PCs.” ArcaOS 5.1 should install on many or most new or recent Intel or AMD-based hardware. It is capable of booting on UEFI-only systems, without the aid of a CSM, using our proprietary 64-bit UEFI loader, and then booting ArcaOS (which itself is 32-bit) just as it would on a traditional BIOS system.

ArcaOS 5.1 also supports booting from GPT partitioned media, making it a great companion OS for multiboot configurations where the disk (or SSD) has already been partitioned this way and where it may be impractical to wipe and convert to MBR-style partitioning.

In fact, it is also something to note that ArcaOS is specifically not intended for use on “older” hardware, such as ISA, EISA, or MicroChannel, as most of the device drivers for those architectures were removed from ArcaOS prior to its initial release.

Another misstatement in the article pertained to pricing which quoted figures for licensing of the 5.0 release which itself is no longer available (though support for 5.0 continues with no stated EOL). Also, if you already have an ArcaOS 5.0 license, generous upgrade discounts apply should you want to move up to ArcaOS 5.1.

Considering new hardware for ArcaOS?

If you are thinking about a new computer, you may be wondering if a new system will run ArcaOS. Most modern hardware will run ArcaOS just fine. But if you want to know more, Arca Noae has some resources to help.

We have a wiki page with quick information about Choosing a System for ArcaOS. We also have a list of a few systems that we have tested on our Tested Hardware page. Don’t be discouraged if the system you are considering is not on the list of tested hardware; we can’t test everything, and new systems are being released all the time. Additionally, you might want to try looking at some of the information available in the OS/2 World wiki (note: Arca Noae is not affiliated with OS/2 World).

If you have access to the new computer (or an identical model on display at a local retailer), and it is a UEFI system, we have a System Evaluation tool that may help with your decision. The System Evaluation tool is available on your ArcaOS install DVD or USB stick, and also as a separate stand-alone tool. To use the System Evaluation tool you don’t need to install anything, ArcaOS is not required, and you don’t need an ArcaOS license for the stand-alone version. You can download the stand-alone System Evaluation tool here and follow the directions to add it to a FAT formatted USB stick. Note that the stand-alone version is probably newer than the one on the ArcaOS install medium.

In order to boot to the System Evaluation tool, it will be necessary to disable Secure Boot if it has been enabled. Many display systems at retail stores run in a “kiosk mode” which sets Secure Boot, disables access to the BIOS settings, and may also disable access to USB ports. When unsure, ask a sales clerk for assistance (and be sure to introduce him or her to ArcaOS!).

The System Evaluation tool cannot guarantee that a given system is capable of running ArcaOS to its fullest potential, but it should be able to assist in at least ruling out systems where it cannot detect known, supported hardware devices. It should also be able to provide a good estimate of the amount of memory which will be visible to ArcaOS below the 4GB boundary (you might want to avoid systems with extremely low memory headroom).

Happy testing!

Couldn’t make it to Warpstock 2024 in Pittsburgh? Stream it live!

Warpstock 2024 begins this Friday, September 27, at 9am EDT.

Lewis Rosenthal and Alex Taylor will be among those presenting this year on a variety of topics of interest concerning ArcaOS. In addition, Lewis will be moderating a 2-part roundtable discussion focused on how people are using the OS/2 platform today, and how they see themselves using it in the future. For more details and for info on all sessions, please visit the event sessions page, and for the complete schedule, visit the event calendar.

Questions may be posed via YouTube Chat as well as IRC during the event.

The WarpEvents YouTube channel is the place to watch the event stream.

The URL for the #Warpstock IRC channel is: ircs://irc.libera.chat:6697/Warpstock (TLS encrypted),
or irc://irc.libera.chat/Warpstock (plain text), or https://web.libera.chat/ (web interface, type #Warpstock into the Channel field).

While visiting the Warpstock website, please consider donating. Warpstock Corporation is a recognized 501(c)3 non-profit organization promoting education, information, and social opportunities to those persons interested in computer operating systems and related software.

Arca Noae turns 10

Very quietly on July 28, Arca Noae, LLC marked its tenth year since its founding in 2014. On this occasion, we at Arca Noae would just like to take a moment to thank our valued customers, clients, and fans for their business, continued dedication to the OS/2 platform, and for their love of ArcaOS, from the warm reception we received at our humble beginnings to the overwhelming excitement at the initial release of ArcaOS Blue Lion nearly three years later, in 2017, and right up through our current versions and updates.

Last year, we released ArcaOS 5.1, which has been a major milestone in OS/2 history, as the first version capable of installing and booting on modern UEFI-based systems without the aid of a Compatibility Support Module (CSM), and the first version to be able to utilize GPT partitioned storage devices.

Today, we stand on the cusp of delivering ArcaOS 5.1.1, which promises to be the first ArcaOS version available in languages other than English, and is slated to include many fixes and enhancements to the installation process for 5.1.

Our continuing mission is to provide support for modern hardware on the OS/2 platform, to make ArcaOS easier to use and more functional for daily computing needs for home users, small-medium sized businesses, and enterprise customers. In that, we see no end in sight.

Thanks for traveling with us on our journey.

USB driver package version 12.16 now available

USB Arca Noae is pleased to announce the immediate availability of release 12.16 of our USB stack.

This is a maintenance release that contains some minor updates.

Fixed a trap that could occur configuring certain endpoints primarily on Isochronous devices.
Fixed an SMP issue that could occur when operating multiple Mass Storage Devices (MSD) on a system with more than one CPU active.
Enhanced the USBSER driver to support up to 16 devices simultaneously.
Added new USBAXGE USB to Ethernet driver.

Most people will see no change in operation after installing this update. See the package readme.txt for details. This update is recommended for all users.

As usual, this release is intended to update an existing installation. Although it can install most of the drivers in the package, it does not install the Host Controller drivers, so it cannot add USB support to a system that does not already have basic USB support installed. More information about the USB drivers can be found in the wiki.

If you have problems with any of the drivers in this release, please read the Troubleshooting Guide in the wiki first. If your problem cannot be resolved with the Troubleshooting Guide, then the problem should be reported in the ticketing system.

Server status update for June 7, 2024

We are pleased to announce that email and our bug tracker are back online. This includes subscription renewal notifications, new ISO download notifications, and incoming contact submissions from our contact page.

We appreciate everyone’s patience while we addressed the hardware problem we experienced. Rest assured, no data was lost or compromised.