Types of processors

Define CISC

Complex Instruction Set Computer an architecture that supports a large number of completed instructions, one instruction usually takes more than 1 clock cycle

Define RISC

Reduced Instruction Set computers, an architecture that supports only a small number of very small instructions, one instruction run over one FDE cycle

Feature of RISC

Simple instruction, fewer instructions, fewer addressing modes, only LOAD and STORE instructions can access memory, Processor hardware is more simple

Features of CISC

Complex instructions, a large range of instructions, many addressing modes, many instructions can access memory, Processor more complex

Adv of CISC

Quicker to code, compiler has very little work to do to translate a high level language into machine code, code is relative short, very little RAM is required to store the instructions

Adv of RISC

The hardware is simpler to build with fewer curcuit needed to carry out complex Instruction, each instruction takes same amount of time(piplining), RAM is now cheap, RISC uses more RAM and software allows better performance processors at less cost