Transcription of MARIE: An Introduction to a Simple Computer
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195 CHAPTER When you wish to produce a result by means of an instrument, do notallow yourself to complicate it. Leonardo da Vinci4 MARIE: An Introductionto a Simple INTRODUCTIOND esigning a Computer nowadays is a job for a Computer engineer with plenty oftraining. It is impossible in an introductory textbook such as this (and in anintroductory course in Computer organization and architecture) to present every-thing necessary to design and build a working Computer such as those we can buytoday. However, in this chapter, we first look at a very Simple Computer calledMARIE: a Machine Architecture that is Really Intuitive and Easy. We then pro-vide brief overviews of Intel and MIPs machines, two popular architecturesreflecting the CISC and RISC design philosophies.
200 Chapter 4 / MARIE: An Introduction to a Simple Computer System Bus Interface Cards FIGURE 4.3 Backplane Bus connects the processor, the I/O devices, and the memory (so all devices share one bus). Many computers have a hierarchy of buses, so it is not uncommon to have
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