Win32_DMAChannel - WMI sample in JScript

The foundations for Manageability in Windows 7/2008/Vista/XP/2000 and Millennium Edition/'98 are Windows Management Instrumentation (WMI; formerly WBEM) and WMI extensions for Windows Driver Model (WDM).

ActiveXperts Network Monitor provides the ability to build monitor check routines based on WMI. ActiveXperts has collected more than a hundred WMI samples. You can use these samples as a base for new check routines you can write yourself.

On this site, you can find many WMI samples.


Win32_DMAChannel

Description

The Win32_DMAChannel WMI class represents a direct memory access (DMA) channel on a Windows computer system. DMA is a method of moving data from a device to memory (or vice versa) without the help of the microprocessor. The system board uses a DMA controller to handle a fixed number of channels, each of which can be used by one (and only one) device at a time.

Example(s)

var wbemFlagReturnImmediately = 0x10;
var wbemFlagForwardOnly = 0x20;

var arrComputers = new Array("DELL17");
for (i = 0; i < arrComputers.length; i++) {
   WScript.Echo();
   WScript.Echo("==========================================");
   WScript.Echo("Computer: " + arrComputers[i]);
   WScript.Echo("==========================================");

   var objWMIService = GetObject("winmgmts:\\\\" + arrComputers[i] + "\\root\\CIMV2");
   var colItems = objWMIService.ExecQuery("SELECT * FROM Win32_DMAChannel", "WQL",
                                          wbemFlagReturnImmediately | wbemFlagForwardOnly);

   var enumItems = new Enumerator(colItems);
   for (; !enumItems.atEnd(); enumItems.moveNext()) {
      var objItem = enumItems.item();

      WScript.Echo("AddressSize: " + objItem.AddressSize);
      WScript.Echo("Availability: " + objItem.Availability);
      WScript.Echo("BurstMode: " + objItem.BurstMode);
      WScript.Echo("ByteMode: " + objItem.ByteMode);
      WScript.Echo("Caption: " + objItem.Caption);
      WScript.Echo("ChannelTiming: " + objItem.ChannelTiming);
      WScript.Echo("CreationClassName: " + objItem.CreationClassName);
      WScript.Echo("CSCreationClassName: " + objItem.CSCreationClassName);
      WScript.Echo("CSName: " + objItem.CSName);
      WScript.Echo("Description: " + objItem.Description);
      WScript.Echo("DMAChannel: " + objItem.DMAChannel);
      WScript.Echo("InstallDate: " + WMIDateStringToDate(objItem.InstallDate));
      WScript.Echo("MaxTransferSize: " + objItem.MaxTransferSize);
      WScript.Echo("Name: " + objItem.Name);
      WScript.Echo("Port: " + objItem.Port);
      WScript.Echo("Status: " + objItem.Status);
      try { WScript.Echo("TransferWidths: " + (objItem.TransferWidths.toArray()).join(",")); }
         catch(e) { WScript.Echo("TransferWidths: null"); }
      WScript.Echo("TypeCTiming: " + objItem.TypeCTiming);
      WScript.Echo("WordMode: " + objItem.WordMode);
   }
}

function WMIDateStringToDate(dtmDate)
{
   if (dtmDate == null)
   {
      return "null date";
   }
   var strDateTime;
   if (dtmDate.substr(4, 1) == 0)
   {
      strDateTime = dtmDate.substr(5, 1) + "/";
   }
   else
   {
      strDateTime = dtmDate.substr(4, 2) + "/";
   }
   if (dtmDate.substr(6, 1) == 0)
   {
      strDateTime = strDateTime + dtmDate.substr(7, 1) + "/";
   }
   else
   {
      strDateTime = strDateTime + dtmDate.substr(6, 2) + "/";
   }
   strDateTime = strDateTime + dtmDate.substr(0, 4) + " " +
   dtmDate.substr(8, 2) + ":" +
   dtmDate.substr(10, 2) + ":" +
   dtmDate.substr(12, 2);
   return(strDateTime);
}