Qualifiers: MappingStrings ("SMBIOS|Type 4|Serial Number") This value comes from the Processor ID member of the Processor Information structure in the SMBIOS information. Only the first two bytes of the property are significant and contain the contents of the DX register at CPU reset-all others are set to 0 (zero), and the contents are in DWORD format. The second is an offset of 0Ch-0Fh, which is the EDX value that the instruction returns. The first is an offset of 08h-0Bh, which is the EAX value that a CPUID instruction returns with input EAX set to 1. If the instruction is supported, the property contains 2 (two) DWORD formatted values. For an x86 class CPU, the field format depends on the processor support of the CPUID instruction. Processor information that describes the processor features. Qualifiers: MappingStrings ("SMBIOS|Type 4|Processor Information|Processor ID") My processor does not have a serial number? "To be filled by o.e.m." is a registration entry that originates in the BIOS and usually indicates you are using a motherboard that you purchased directly from the manufacturer, and then assembled into your own custom machine. Return: "To Be Filled By O.E.M." What does this mean?
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