title: What is the first instruction to be executed by CPU when we switch on the PC?
body: <p>Recently I have been reading the booting.
  on the booting I have the following questions?</p>
  
  <p>I know <code>JMP 0xfffffff0</code> is the first instruction that is executed by the CPU after it receives the <code>POWERGOOD SIGNAL</code> by clock circuit here my questions are</p>
  
  <p><strong>1) who will load that address in the CPU registers.</strong></p>
  
  <p><strong>2)BIOS ROM contents will be copied to RAM exactly at what time means (whether before loading the address in to the CPU registers or after CPU executes the JMP instruction.)</strong></p>
  
  <p><strong>please also please provide any manuals which illustrate what exactly happen when we switch on the PC.</strong></p>
  
  <p>I want to explain this concept for seminar purpose in my college so that's why I want know more internals to answer the question that will trigger at the time of seminar.</p>