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I was just thinking about this: Does the BIOS execute on the CPU? If so, how does it handle multiple CPU architectures/instruction sets? If not, what does it execute on?

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closed as unclear what you're asking by Wandering Logic, D.W., Rick Decker, Shaull, Luke Mathieson Aug 18 '14 at 5:46

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Welcome to Computer Science! Your question is a very basic one. Since you did not include much of an attempt to solve it on your own, we have little to work with. Start with a simple search, find references, try to solve your by yourself before asking here. If you still have questions, then edit your post to reflect your work and we can give you a clear answer. $\endgroup$ – ZeroUltimax Aug 13 '14 at 21:24
  • $\begingroup$ Furthermore, I don't think that this is a computer science question. The BIOS is an implementation detail, not a concept. $\endgroup$ – Raphael Aug 14 '14 at 7:57
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Yes, the processor itself runs the BIOS boot program. Each motherboard has to be equipped with appropriate BIOS that a processor of compatible chip set can use.

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Yes.

The bios is just software stored on a chip. It has a special memory address, and the CPU is hardwired to execute the program in that address when it turns on.

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