1    /CPU

       /CPU=(m,n,...)

    When used with /RING_BUFFER, displays only the entries for the
    specified CPUs. If you specify only one CPU, you can omit the
    parentheses.

2    /RING_BUFFER

    Displays the SWIS ring buffer (also known as the SWIS log), with
    the most recent entry first, and assigns meaning to certain
    values, such as trap type and system service invoked. For best
    results, execute READ/EXEC or READ/IMAGE SYS$PUBLIC_VECTORS first
    so that the system service codes are recognized.