SYSTEM_INFO

Important:
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This structure contains information about the current computer system. This includes the processor type, page size, original equipment manufacturer (OEM) identifier, and other such information.

typedef struct _SYSTEM_INFO {
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

An obsolete member that is not used by Windows CE.

wProcessorArchitecture

Specifies the system's processor architecture.

PROCESSOR_ARCHITECTURE_INTEL
PROCESSOR_ARCHITECTURE_MIPS
PROCESSOR_ARCHITECTURE_ALPHA
PROCESSOR_ARCHITECTURE_PPC

PROCESSOR_ARCHITECTURE_UNKNOWN

dwReserved

Reserved for future use.

dwPageSize

Specifies the page size and the granularity of page protection and commitment. This is the page size used by the VirtualAllocfunction.

lpMinimumApplicationAddress

Pointer to the lowest memory address accessible to applications and dynamic-link libraries (DLLs).

lpMaximumApplicationAddress

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

dwActiveProcessorMask

Specifies a mask representing the set of processors configured into the system. Bit 0 is processor 0; bit 31 is processor 31.

dwNumberOfProcessors

Specifies the number of processors in the system.

dwProcessorType

Specifies the type of processor in the system.

It is no longer relevant. Use the wProcessorArchitecture, wProcessorLevel, and wProcessorRevisionmembers to determine the type of processor.

This member is one of the following values:

PROCESSOR_INTEL_386
PROCESSOR_INTEL_486
PROCESSOR_INTEL_PENTIUM
PROCESSOR_MIPS_R3000
PROCESSOR_MIPS_R4000
PROCESSOR_HITACHI_SH3
PROCESSOR_HITACHI_SH4
PROCESSOR_PPC_403
PROCESSOR_PPC_821
PROCESSOR_STRONGARM

PROCESSOR_ARM720

dwAllocationGranularity

Specifies the granularity with which virtual memory is allocated. For example, a VirtualAllocrequest to allocate 1 byte will reserve an address space of dwAllocationGranularitybytes. This value was hard coded as 64K in the past, but other hardware architectures may require different values.

wProcessorLevel

Specifies the system's architecture-dependent processor level.

If wProcessorArchitectureis PROCESSOR_ARCHITECTURE_INTEL, wProcessorLevelcan be one of the following values:

Value	Description
4	Intel 80486
5	Pentium

If wProcessorArchitectureis PROCESSOR_ARCHITECTURE_MIPS, wProcessorLevelis of the form 00 XX, where XXis an 8-bit implementation number (bits 8-15 of the PRId register). The member can be the following value:

Value	Description
3	MIPS R3000
0004	MIPS R4000
	If wProcessorArchitectureis PROCESSOR_ARCHITECTURE_PPC, wProcessorLevelis of the form XXXX, where XXXXis a 16-bit processor version number (the high-order 16 bits of the Processor Version Register).

wProcessorRevision

Specifies an architecture-dependent processor revision. The following table shows how the revision value is assembled for each type of processor architecture.

Value	Description
Intel 80386 or 80486	A value of the form xxyz.
	If xxis equal to 0xFF, y- 0xA is the model number, and zis the stepping identifier. For example, an Intel 80486-D0 system returns 0xFFD0.
	If xxis not equal to 0xFF, xx+ ï¿½A' is the stepping letter and yzis the minor stepping.
Intel Pentium, Cyrix, or NextGen 586	A value of the form xxyy, where xxis the model number and yyis the stepping. For example, a value of 0x0201 indicates Model 2, Stepping 1.
MIPS	A value of the form 00 xx, where xxis the 8-bit revision number of the processor (the low-order 8 bits of the PRId register).
ALPHA	A value of the form xxyy, where xxyyis the low-order 16 bits of the processor revision number from the firmware. Display this value as follows:
	Model ï¿½A'+ xx, Pass yy
PPC	A value of the form xxyy, where xxyyis the low-order 16 bits of the Processor Version Register. Display this value as a fixed point number:
	xx. yy

Requirements

Runs on	Versions	Defined in	Include	Link to
Windows CE OS	1.0 and later	Winbase.h

Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.

See Also

GetSystemInfo, VirtualAlloc