0 Replies Latest reply on Aug 20, 2011 8:08 AM by rfdes

    System Management Mode (SMM) questions - need help

    Community Member

      Hi..

      Just joined the group as I was told this would be an excellent location for asking my question(s)..

       

      I own a '98 vintage Tektronix logic analyzer that used a custom controller board which ran Win95/98

      and made use of a 133 MHz Pentium.  The analyzer supported the 'soft - off' power down method

      which would force a safe windows shutdown, followed by a hardware power off.  We all expect

      this nowadays in the computers of our time.  When I upgraded to Windows 2000, this soft power

      off mode ceases to work.  I've discovered the reason and I need to make some changes

      to the SMM interrupt handler located in bios.

       

       

      Finally, my question:

       

      In order to shutdown my logic analyzer system properly, I need to make a Win2000 system call.

      Is this allowable from within SMM?  The documentation that I have found on the Internet in regards

      to SMM is not clear.  If this is not possible to make a system call, what would be a recommended

      method of achieving what I need?  Could I create a process which would initiate when I exit SMM?

       

      Any help that you can offer would be great.  I have yet to find anyone with any experience in

      the 'nuts-n-bolts' of system management mode..

       

      thanks

      Jim