pSOS (real-time operating system)

<h2 id="migration-away-from-psos">Migration away from pSOS</h2>
<p>In March 2000, rival company <a href="/facts/Express_Logic/WrRGsNVz">Express Logic</a> released their Evaluation Kit for pSOS+ users, designed to provide a migration path to its <a href="/facts/ThreadX/WrRGsNVz">ThreadX</a> RTOS.
</p><p>During August 2000, MapuSoft Technologies Inc. came up with the pSOS OS Changer porting kit which can smoothly move the software to multiple OS such as <a href="/facts/Linux/9FvCKSTq">Linux</a>, VxWorks, and more. It includes an <i><a href="/facts/Integrated_development_environment/jbEINSQf">integrated development environment</a></i> (IDE) and <i>application programming interface</i> (<a href="/facts/API/GMlN4vUr">API</a>) optimization along with a profiling tool to measure API timing on target boards (www.mapusoft.com). 
</p><p>In August 2007, RoweBots, a former partner of SCG and ISI, <a href="/facts/Open_source/7X9rCdz4">open sourced</a> their pSOS+ compatible version called Reliant. It is available to all that wish to upgrade without application changes.
</p><p>The <a href="/facts/Xenomai/9bsN53FK">Xenomai</a> project supports pSOS+ APIs (and others traditional RTOS APIs) over a Linux-based real-time framework to allow existing industrial applications to migrate easily to a Linux-based environment while keeping stringent real-time guarantees.
</p><p>Another open sourced alternative is <a href="/facts/RTEMS/uULEVKeV">RTEMS</a>, which has support for various APIs, including the "Classic API" (compatible to pSOS) and the POSIX API. Compared to Linux, RTEMS is a closer match to pSOS applications due to its lower memory size and its strict realtime behaviour.
</p><p>Popular <i>Secure Sockets Layer</i> (SSL), now <i><a href="/facts/Transport_Layer_Security/pGy16TnA">Transport Layer Security</a></i> (TLS), libraries such as <a href="/facts/WolfSSL/26UD7dQE">wolfSSL</a> still support pSOS.
</p>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/FlexOS/563z8WWo">FlexOS</a></li>
<li><a href="/facts/Novell_Embedded_Systems_Technology/E3bBKKPv">Novell Embedded Systems Technology</a> (NEST)</li>
<li><a href="/facts/UNIX_System_V_STREAMS/MWSDgwBL">UNIX System V STREAMS</a></li></ul>

<h2 id="further-reading">Further reading</h2>
<ul><li><a href="https://web.archive.org/web/19980219171501/http://www.isi.com/Products/pSOS/">"pSOSystem"</a>. <a href="/facts/Integrated_Systems%2c_Inc./MCX2b8KC">Integrated Systems, Inc.</a> (ISI). 1998. Archived from <a href="http://www.isi.com/Products/pSOS/">the original</a> on 1998-02-19.</li>
<li><a href="https://web.archive.org/web/20070928131427/http://www.rtos.com/news/detail/?prid=11">"Express Logic announcement of their Evacuation Kit"</a>. Archived from <a href="http://www.rtos.com/news/detail/?prid=11">the original</a> on 2007-09-28. Retrieved 2007-06-13.</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"pSOSystem and the NEST Development Environment - Designing Embedded Applications with NetWare Connectivity" (White paper). Integrated Systems, Inc. (ISI). 1998. Archived from the original on 1998-02-19. <a href="https://web.archive.org/web/19980219173150/http://www.isi.com/Products/pSOS/Networking/pNDE.html" target="_blank">https://web.archive.org/web/19980219173150/http://www.isi.com/Products/pSOS/Networking/pNDE.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"Novell Announces RTOS Vendor Program Which Brings Integrated Networking Solutions to the Embedded Systems Marketplace" (Press Release). Orem, UT, USA: Novell, Inc. 1995-05-23. Archived from the original on 2018-08-18. Retrieved 2018-08-18. "Because Novell used Integrated Systems' FlexOS during the development and testing of NEST, we are in the unique position of supporting it through both our real-time product lines pSOSystem for deeply embedded markets, and FlexOS for point of sale," said Moses Joseph, vice president of marketing for Integrated Systems. "Developers using the FlexOS development kit and the expanded pSOSystem/NEST package for everything from home security and entertainment to office automation and global communications applications, now have quick and easy access to the widest variety of standard networking protocols. <a href="http://www.novell.com/news/press/archive/1995/05/pr00121.html" target="_blank">http://www.novell.com/news/press/archive/1995/05/pr00121.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"pSOSystem and the NEST Development Environment - Designing Embedded Applications with NetWare Connectivity" (White paper). Integrated Systems, Inc. (ISI). 1998. Archived from the original on 1998-02-19. <a href="https://web.archive.org/web/19980219173150/http://www.isi.com/Products/pSOS/Networking/pNDE.html" target="_blank">https://web.archive.org/web/19980219173150/http://www.isi.com/Products/pSOS/Networking/pNDE.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
</ol>

pSOS (real-time operating system) open-in-new

pSOS (real-time operating system)