[ntp:questions] Meinberg NTP monitor, silly question

David J Taylor david-taylor at blueyonder.delete-this-bit.and-this-part.co.uk.invalid
Mon Dec 21 12:08:01 UTC 2009


> Hi again...
>
> OK, I've got everything as it should be, but...
>
> I see in the companion registry entry, for the 'serenum' key, that the
> ImagePath type is indeed REG_EXPAND_SZ, where as in the 'serial' key,
> the ImagePath is just REG_SZ.
>
> I've tried all sorts in there, resulting in either no working com ports
> at all, or just the standard MS driver being loaded.  I cannot find a
> way to change the value type from REG_SZ to REG_EXPAND_SZ.
>
> I checked the file sizes, and they all correspond you your 32 bit file
> sizes just fine.
>
> I remember Dave Hart saying something about this a long time back to
> someone else, and the need to enter a long string of hex digits for the
> ImagePath registry entry.  But I can't find that information any more.
>
> For now, it's still defaulting to usermode timestamps.   Any other
> idea's?
>
> Regards.
> Dave Baxter.

Well, I just checked on my actual XP system (I had checked on a different 
XP system before), and the string is a plain REG_SZ, not the Expand 
variety.

HKLM\SYSTEM\CurrentCotrolSet\Services\Serial\

  ImagePath REG_SZ => system32\drivers\serialpps.sys

Dave Hart's install and uninstall .BAT files just use REG_SZ, so I don't 
think that's the issue.

Here's an exported REG_EXPAND_SZ string - enter into a file  serial.reg 
and double-click:

________________________________________
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Serial]
"ImagePath"=hex(2):73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,52,\
  00,49,00,56,00,45,00,52,00,53,00,5c,00,73,00,65,00,72,00,69,00,61,00,6c,00,\
  70,00,70,00,73,00,2e,00,73,00,79,00,73,00,00,00
________________________________________

but I don't think it will alter anything.

Perhaps you need to open the protection on serialpps.sys?

As the serialpps.sys is an unsigned driver, I wonder whether there is an 
option in XP not to accept unsigned drivers?  Anything in the event log 
when XP boots - before you log in?  I don't think it helps a lot, but 
there's this page:

  http://articles.techrepublic.com.com/5100-10878_11-5875443.html

73,
David 




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