danieldotwav / cpu-manufacturer-id-decoder

This program utilizes C++ and specific Windows compiler intrinsics to decode and display the CPU manufacturer ID by accessing the CPU's built-in CPUID information. It demonstrates how to extract and format this low-level information for display.

CPU Manufacturer ID Decoder

This program is designed to decode and print the CPU manufacturer ID using C++. It utilizes the intrinsic function __cpuid provided by <intrin.h> to access the CPU's manufacturer ID and then prints it to the standard output.

Requirements

• A compiler that supports C++ and the <intrin.h> header file. This typically means using a compiler on Windows, as <intrin.h> is specific to Microsoft's compilers (e.g., MSVC).

How It Works

The program defines a function decodeAndPrintCpuManufacturer which performs the following operations:

1. It declares an integer array cpuInfo with 4 elements to store the CPUID information.
2. A character array manufacturerId of 13 bytes is declared to hold the 12-character manufacturer ID plus a null terminator.
3. The __cpuid function is called with cpuInfo array and an input value of 0 to retrieve the CPU manufacturer ID.
4. The CPU manufacturer ID is extracted from the cpuInfo array (from the EBX, EDX, and ECX registers) and stored in the manufacturerId array in the correct order.
5. The manufacturer ID is null-terminated and printed to the standard output.

Output

CPU Manufacturer ID: [Manufacturer ID]

Where [Manufacturer ID] is replaced with the actual ID retrieved from the CPU.