Note that the program may face one of the early Intel P5 processors: they do. After that instruction returns, EAX, EBX, ECX, and EDX get copied to the CPUInfo array you passed into this function. Next - if it is a Cyrix or a NexGen processor - the CPUID instruction may. The _cpuid() instruction provided by the MSVC compiler maps "InfoType" to EAX before the call to the cpuid instruction. Scroll down the document to find the docs for CPUID. If you want all the details of the CPUID instruction, including on how to get the make, model, and stepping of your CPU, as well as the "Brand String" such as "Intel(R) Core (TM)i7-3770 CPU 3.4GHZ." you can reference the Intel manual at the link below. Intel ARK CPUID in CPUID database in CPU World (to confirm actual CPUIDs) x86, 圆4 Instruction Latency, Memory Latency and CPUID dumps (to retrieve CPUID dumps) linux. In your case, this should print "GenuineIntel". Vendor (who made the processor) int regs = But it won't work or return a serial number unless you have a P3.
You can achieve the same thing with _cpuid function by passing "3" as the second parameter. The processor serial number was the concatenation of eax, edx, and ecx together But after a huge uproar over privacy, they quickly disabled that feature in subsequent CPU releases.įor the record, the instruction that executed this feature in assembly: mov eax, 3
Intel introduced the unique id (serial number) instruction with the P3. Unless you have a Pentium III, you do not have a "unique ID" associated with your CPU. I could not understand among those information which is my computer's unique CPU Id.ĭo you mean "serial number", "who made the processor", or the "string that identifies the make and model of the processor". It outputs information something like: For InfoType 0 I want to get CPU Id of my computer (windows) using c++.
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