32/64-Bit 80x86 Assembly Language Architecture

Chapter 16. What CPUID?

There are multiple manufacturers all making different models of the 80×86 type microprocessors. Some are variations of the Intel processors and are highly specialized, but most are not. They are clones of the Intel processor family but with their own designs that require alternate optimization methods. Most of these manufacturers have technical manuals usually available in a PDF format that can be downloaded from the Internet and used for all your custom optimization needs. If the project you're coding for uses custom hardware, then you are probably using a custom processor such as National Semiconductor's NS486SXF under an operating system such as pSOS. When you are designing code for a specific processor, your code can ...