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OCR: 5-12 COM PUTE ARCHITECTURE Rea nly YE mory If a computer has RAM does it need ROM? Read. -only memory or ROM ,is a set of chips containing instructions that help computer prepare for processing tasks The instruct tions in ROM are permanent and the only to change them IS to remove the ROM chips from ithe main board and replace them with another set You might wonder the computer includes chips with programs permanently stored in them Why not use the more adaptable RAM? The answer to this question is that when you turn on your computer the central process- ing unit receives electrical power and IS ready to begin executing instructions because the computer was ju st turned on RAM is empty- doesn't contain any instruc- tions for the central processing unit to execute This iswhen ROM Iplays its ...