Assuming that it takes 2 nsec to copy a byte, how much time does it take to completely rewrite the screen of an 80-character x 25-line text mode memory-mapped screen? What about a 1024 x 768-pixel graphics screen with 24-bit color? Explain your calculations and justify your answer.

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Fundamentals of hardware concepts

A computer system is made of a combination of hardware and software. The software consists of a set of instructions that instruct the computer to perform a task. It can be system software or application software. Whereas, hardware is the part of a computer that can be touched. In other words, computer hardware consists of the physical components of a computer. The internal parts of a computer are called components and the external hardware components are called peripherals.