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CIM_DMA class

The CIM_DMA class represents computer architecture direct memory access (DMA).

Important  The DMTF (Distributed Management Task Force) CIM (Common Information Model) classes are the parent classes upon which WMI classes are built. WMI currently supports only the CIM 2.x version schemas.

The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

class CIM_DMA : CIM_SystemResource
{
  uint16   AddressSize;
  uint16   Availability;
  boolean  BurstMode;
  uint16   ByteMode;
  string   Caption;
  uint16   ChannelTiming;
  string   CreationClassName;
  string   CSCreationClassName;
  string   CSName;
  string   Description;
  uint32   DMAChannel;
  datetime InstallDate;
  uint32   MaxTransferSize;
  string   Name;
  string   Status;
  uint16   TransferWidths[];
  uint16   TypeCTiming;
  uint16   WordMode;
};

Members

The CIM_DMA class has these types of members:

Properties

The CIM_DMA class has these properties.

AddressSize
Data type: uint16
Access type: Read-only

DMA channel address size, in bits. Permissible values are 8, 16, 32, and 64. If unknown, enter 0.

Availability
Data type: uint16
Access type: Read-only

Availability of the DMA.

ValueMeaning
1

Other

2

Unknown.

3

Available.

4

In use (not available).

5

In use, but available (sharable).

 

BurstMode
Data type: boolean
Access type: Read-only

If TRUE, the DMA channel supports burst mode.

ByteMode
Data type: uint16
Access type: Read-only

Indicates whether DMA can execute in count-by-byte mode.

ValueMeaning
1

Other.

2

Unknown.

3

Cannot execute in count-by-byte mode.

4

Able to execute in count-by-byte mode.

 

Caption
Data type: string
Access type: Read-only

Short textual description of the object. This property is inherited from CIM_ManagedSystemElement.

ChannelTiming
Data type: uint16
Access type: Read-only

DMA channel timing.

ValueMeaning
1

Other.

2

Unknown.

3

ISA-compatible.

4

Type A.

5

Type B.

6

Type F.

 

CreationClassName
Data type: string
Access type: Read-only

Name of the class or subclass used in the creation of an instance. When used with other key properties of the class, this property allows all instances of the class and its subclasses to be uniquely identified.

CSCreationClassName
Data type: string
Access type: Read-only

Scoping computer system's creation class name.

CSName
Data type: string
Access type: Read-only

Scoping computer system's name.

Description
Data type: string
Access type: Read-only

Textual description of the object. This property is inherited from CIM_ManagedSystemElement.

DMAChannel
Data type: uint32
Access type: Read-only

DMA channel number. This number is part of the object's key value.

InstallDate
Data type: datetime
Access type: Read-only

Date and time the object was installed. This property does not need a value to indicate that the object is installed. This property is inherited from CIM_ManagedSystemElement.

MaxTransferSize
Data type: uint32
Access type: Read-only

Maximum number of bytes that can be transferred by this DMA channel. If unknown, enter 0 (zero).

Name
Data type: string
Access type: Read-only

Label by which the object is known. When subclassed, this property can be overridden to be a key property. This property is inherited from CIM_ManagedSystemElement.

Status
Data type: string
Access type: Read-only

Indicates the current status of the object. This property is inherited from CIM_ManagedSystemElement.

Values include the following:

"OK"
"Error"
"Degraded"
"Unknown"
"Pred Fail"
"Starting"
"Stopping"
"Service"
"Stressed"
"NonRecover"
"No Contact"
"Lost Comm"
TransferWidths
Data type: uint16 array
Access type: Read-only

Array that indicates all of the transfer widths, in bits, supported by this DMA channel. Permissible values are 8, 16, 32, 64, and 128 bits. If unknown, enter 0 (zero).

TypeCTiming
Data type: uint16
Access type: Read-only

Indicates whether Type C (burst) timing is supported.

ValueMeaning
1

Other.

2

Unknown.

3

ISA-compatible.

4

Not supported.

5

Supported.

 

WordMode
Data type: uint16
Access type: Read-only

Indicates whether DMA can execute in count-by-word mode.

ValueMeaning
1

Other.

2

Unknown.

3

Cannot execute in count-by-word mode.

4

Able to execute in count-by-word mode.

 

Remarks

The CIM_DMA class is derived from CIM_SystemResource.

WMI does not implement this class. For classes derived from CIM_DMA, see Win32 Classes.

This documentation is derived from the CIM class descriptions published by the DMTF. Microsoft may have made changes to correct minor errors, conform to Microsoft SDK documentation standards, or provide more information.

Requirements

Minimum supported client

Windows Vista

Minimum supported server

Windows Server 2003

Namespace

\root\CIMV2

MOF

CIMWin32.mof

DLL

CIMWin32.dll

 

 

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