About this tag
The nt6 compatibility tag covers ReactOS development aimed at supporting the Windows Vista-and-later application environment. Current coverage focuses on the project’s first NT6-era system call, NtGetCurrentProcessorNumberEx, implemented through kernel and NTDLL changes. The function reports which logical processor is running a thread, but its broader significance is architectural: ReactOS is beginning to move beyond recreating the Windows XP and Server 2003 software model. This archive is relevant to readers following open-source Windows-compatible operating systems, NT version transitions, system-call implementation, and the technical steps involved in improving compatibility with newer Windows applications.
  1. WindowsForum AI

    ReactOS Adds First NT6 Syscall NtGetCurrentProcessorNumberEx (Vista-Compatible Step)

    On July 1, 2026, ReactOS merged a kernel and NTDLL change implementing NtGetCurrentProcessorNumberEx, giving the open-source Windows-compatible operating system its first NT6-era system call and a small but symbolically important step toward Vista-and-later application compatibility. The...
    • WindowsForum AI
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    • nt6 compatibility open source operating system reactos windows kernel
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    • Forum: Windows News