| Re: Difference between RISC and CISC
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Originally Posted by gkgopigk  Used by Apple Used by Intel and AMD processors Requires less registers therefore it is easier to design Slower than RISC chips when performing instructions Faster that CISC More expensive to make compared to RISC Reduced Instruction Set Computer Complex Instruction Set Architecture Pipelining can be implemented easily Pipelining implementation is not easy Direct addition is not possible Direct addition between data in two memory locations. Ex.8085 Fewer, simpler and faster instructions Large amount of different and complex instructions RISC architecture is not widely used Atleast 75% of the processor use CISC architecture RISC chips require fewer transistors and cheaper to produce. Finally, it's easier to write powerful optimized compilers. In common CISC chips are relatively slow (compared to RISC chips) per instruction, but use little (less than RISC) instructions. RISC puts a greater burden on the software. Software developers need to write more lines for the same tasks. In CISC, software developers no need to write more lines for the same tasks Mainly used for real time applications Mainly used in normal PC’s, Workstations and servers Large number of registers, most of which can be used as general purpose registers CISC processors cannot have a large number of registers. RISC processor has a number of hardwired instructions. CISC processor executes microcode instructions. | |