Solved: A question about CPU Architecture and microcode

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Although this is a technical support forum, if anybody has studied these as part of their course, I could use a few clarifications.

I have been reading that many CPUs have an integrated program onto their chips, that provides a more complex instruction set (featuring intructions more complex than those that can be directly processed by the hardware) which is called microcode. I don't understand what's the use of that, though, besides compatibility issues. If the programmer needs more complex commands in his code, why wouldn't he code in a higher level language? Why overload the CPU with another software to execute even more commands? Can the direct "hard-wired" commands be accessed, when a CPU uses microcode?
 
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