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      AUTHORPÆDIA is hosted by Authorpædia Foundation, Inc. a U.S. non-profit organization.

    Jacob of Serugh

    Run-Time Abstraction Services (RTAS) is run-time firmware that provides abstraction to some operating systems.[1] These include those running on IBM System i and IBM System p computers.

    It contrasts with Open Firmware, in that the latter is usually used only during boot, while RTAS is used during run-time.

    Later it was renamed to Open Power Abstraction Layer (OPAL), and it's stored in a PNOR (platform NOR) flash memory.

    Ppc64-diag, libservicelog, servicelog, and powerpc-utils packages can be used to diagnose RTAS events.[2]

    References

    1. ^ PowerPC Microprocessor Common Hardware Reference Platform. s.l.: Elsevier. 2012-06-25. ISBN 978-0-12-801555-1.
    2. ^ "Linux on IBM Systems". IBM. 2023-05-10. Retrieved 2025-07-07.
    Credit: Wikipedia https://en.wikipedia.org/wiki/Run-Time_Abstraction_Services

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