CPUID

#include <iostream>
#include <iomanip>

using namespace std;

void VendorID()
{
    unsigned long iEax = 0, iEbx = 0, iEcx = 0, iEdx = 0;
    char szVenderID[12] = {'\0'};
    __asm{
        mov eax, 0x0000000
        cpuid

        mov dword ptr[szVenderID+0], ebx
        mov dword ptr[szVenderID+4], edx
        mov dword ptr[szVenderID+8], ecx
        mov byte ptr[szVenderID+12], '\0'

        mov iEax, eax
        mov iEbx, ebx
        mov iEcx, ecx
        mov iEdx, edx
    }

    cout << "**** eax = 0x0000000 ****\n";
    cout << "EAX:0x" << setw(8) << setfill('0') << hex << iEax << endl;
    cout << "EBX:0x" << setw(8) << setfill('0') << hex << iEbx << endl;
    cout << "ECX:0x" << setw(8) << setfill('0') << hex << iEcx << endl;
    cout << "EDX:0x" << setw(8) << setfill('0') << hex << iEdx << endl;
    cout << "Vendor ID is " << szVenderID << endl;
    cout << "\n";

    return;
}

void ProcesserSerialNumber()
{
    unsigned long iEax = 0, iEbx = 0, iEcx = 0, iEdx = 0;
    __asm{
        mov eax, 0x0000003
        cpuid

        mov iEax, eax
        mov iEbx, ebx
        mov iEcx, ecx
        mov iEdx, edx
    }

    cout << "**** eax = 0x00000003 ****\n";
    cout << "EAX:0x" << setw(8) << setfill('0') << hex << iEax << endl;
    cout << "EBX:0x" << setw(8) << setfill('0') << hex << iEbx << endl;
    cout << "ECX:0x" << setw(8) << setfill('0') << hex << iEcx << endl;
    cout << "EDX:0x" << setw(8) << setfill('0') << hex << iEdx << endl;
    cout << "\n";

    return;
}

void HighestExtendedFunctionSupported()
{
    unsigned long iEax = 0, iEbx = 0, iEcx = 0, iEdx = 0;
    __asm{
        mov eax, 80000000h
        cpuid

        mov iEax, eax
    }
    cout << "**** eax = 80000000h ****\n";
    cout << "EAX:0x" << setw(8) << setfill('0') << hex << iEax << endl;
    cout << "\n";

    return;
}

void ProcessorBrandString()
{
    char szPBS[48] = {'\0'};
    __asm{
        mov eax, 80000002h
        cpuid

        mov dword ptr[szPBS+0], eax
        mov dword ptr[szPBS+4], ebx
        mov dword ptr[szPBS+8], ecx
        mov dword ptr[szPBS+12], edx

        mov eax, 80000003h
        cpuid

        mov dword ptr[szPBS+16], eax
        mov dword ptr[szPBS+20], ebx
        mov dword ptr[szPBS+24], ecx
        mov dword ptr[szPBS+28], edx

        mov eax, 80000004h
        cpuid

        mov dword ptr[szPBS+32] ,eax
        mov dword ptr[szPBS+36], ebx
        mov dword ptr[szPBS+40], ecx
        mov dword ptr[szPBS+44], edx
        mov word ptr[szPBS+48], '\0'

    }

    cout << "**** eax = 80000002h, 80000003h, 80000004h ****\n";
    cout << "Processor Brand String : " << szPBS << endl;
    cout << "\n";

    return;
}

void main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    VendorID();

    ProcesserSerialNumber();

    HighestExtendedFunctionSupported();

    ProcessorBrandString();

    cin.get();

    return;
}