Home›Articles›How an unreleased operating system changed the ARM instruction setArticleHow an unreleased operating system changed the ARM instruction setArticlesConnectionsSourcesComments (0)Reader Challenges (0)ConnectionsArticle OnARX (operating system), Systems Well-attested SourcesWikipedia: ARX (operating system)OverviewQuote, OverviewMuch of the OS ran in user mode and as a result suffered performance problems due to switches into kernel mode to perform mutexes, which led to the introduction of the SWP instruction to the ARM2 v2a instruction set.View the SourceComputing Atlas Original Articlestier 1Comments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.