/sys$common/syshlp/helplib.hlb
Sys Files, [SYS$LDR], EXCEPTION_MON.EXE
 *Conan The Librarian 

    Image loaded if the SYSTEM_CHECK system parameter is set to 1.
    This enables using the SDA command SHOW PROCESS/SEMAPHORE, which
    traces the activity of the inner mode semaphore used by kernel
    threads.
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