SYSTEM_INFO

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This structure contains information about the current computer system. This includes the processor type, page size, memory addresses, and OEM identifier.

Syntax

typedef struct _SYSTEM_INFO {
  union {
  DWORD dwOemId;
  struct {
    WORD wProcessorArchitecture;
    WORD wReserved;
  };
};
  DWORD dwPageSize;
  LPVOID lpMinimumApplicationAddress;
  LPVOID lpMaximumApplicationAddress;
  DWORD dwActiveProcessorMask;
  DWORD dwNumberOfProcessors;
  DWORD dwProcessorType;
  DWORD dwAllocationGranularity;
  WORD wProcessorLevel;
  WORD wProcessorRevision;
} SYSTEM_INFO, *LPSYSTEM_INFO;

Members

• dwOemId
  Obsolete, do not use.

• wProcessorArchitecture
  System processor architecture.

  The accepted value for this member is PROCESSOR_ARCHITECTURE_ARM

  Note

  Windows Mobile only supports processors based on the ARM architecture.

• wReserved
  Reserved for future use.

• dwPageSize
  Page size and the granularity of page protection and commitment. This is the page size used by the VirtualAlloc function.

• lpMinimumApplicationAddress
  Pointer to the lowest memory address accessible to applications and DLLs.

• lpMaximumApplicationAddress
  Pointer to the highest memory address accessible to applications and DLLs.

• dwActiveProcessorMask
  Mask representing the set of processors configured into the system. Bit 0 is processor 0; bit 31 is processor 31.

• dwNumberOfProcessors
  Number of processors in the system.

• dwProcessorType
  Type of processor in the system.

  This is no longer relevant. Use the wProcessorArchitecture, wProcessorLevel, and wProcessorRevision members to determine the type of processor.

  The accepted value is PROCESSOR_ARM720

• dwAllocationGranularity
  The granularity with which virtual memory is allocated.

  For example, a VirtualAlloc request to allocate 1 byte will reserve an address space of dwAllocationGranularity bytes.

  This value was hard coded as 64 KB in the past, but other hardware architectures may require different values.

• wProcessorLevel
  System architecture-dependent processor level.

  If wProcessorArchitecture is PROCESSOR_ARCHITECTURE_ARM, wProcessorLevel can have the following value.

  Value	Description
  4	ARM version 4

• wProcessorRevision
  Specifies an architecture-dependent processor revision. The following table shows how the revision value is assembled for the ARM processor architecture.

  Value	Description
  ARM	Is a value from 1 to 16. Consult your ARM CPU manual.

Requirements

See Also

Reference

System Management Structures
GetSystemInfo
VirtualAlloc