Read CPU information using CPUID in DOS and WINDOWS

I. Compile with VC ++ in WINDOWS.

Format: unsigned long DBase;
Char cA [13];
Char cB [49];
_ Asm
  {
Xor eax, eax
Cpuid
Mov DBase, eax
Mov dword ptr cA, ebx
Mov dword ptr cA + 4, edx
Mov dword ptr cA + 8, ecx

Mov eax, 0x80000002
Cpuid
Mov dword ptr cB, eax
Mov dword ptr cB + 4, ebx
Mov dword ptr cB + 8, ecx
Mov dword ptr cB + 12, edx

Mov eax, 0x80000003
Cpuid
Mov dword ptr cB + 16, eax
Mov dword ptr cB + 20, ebx
Mov dword ptr cB + 24, ecx
Mov dword ptr cB + 28, edx

Mov eax, 0x80000004
Cpuid
Mov dword ptr cB + 32, eax
Mov dword ptr cB + 36, ebx
Mov dword ptr cB + 40, ecx
Mov dword ptr cB + 44, edx
  }

2. In DOS, DJGPP must be used for compilation (32-bit support ).

Format:

# Define CPUID (op, a, B, c, d)
_ Asm _ volatile _ ("cpuid": "= a" (a), "= B" (B), "= c" (c ), "= d" (d): "a" (op ))

 

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