Cisc And Risc Processor Technologies

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differences between a CISC instruction set and a RISC instruction set and list some key advantages and disadvantages of RISC as compared to CISC

2. Introduction

Speeding up a computer system involves many different strategies. By speeding up the input and output devices in different peripherals. But the most fruitful place to speed up the system is by designing a faster processor. This report will explain "CISC" and "RISC" technologies and show how computer designers have tried to do speed up processors by implementing these tow technologies.

CISC technology was not known as a processor technology back in time. It was just the way that manufactures designed processors. So the Term CISC was define just when the RISC philosophy was adopted.

In the mid-1970�s advances in technology began to reduce the difference in speed between main memory and processor chips. As memory speed increased, and high level languages displaces assembly language the major reasons for Complex ...

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sets
� Build of high-level instruction sets


3.2 The Advantages of CISC
At the time of their initial development, CISC machines used available technologies to optimize computer performance.

Microprogramming is as easy as assembly language to implement, and much less expensive than hardwiring a control unit.

The ease of micro coding new instructions allowed designers to make CISC machines upwardly compatible: a new computer could run the same programs as earlier computers because the new computer would contain a superset of the instructions of the earlier computers.

As each instruction became more capable, fewer instructions could be used to implement a given task. ...

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