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What is RISC and CISC?

 
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zkhan
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Joined: 27 Sep 2008
Posts: 19

PostPosted: Tue Dec 02, 2008 11:49 pm    Post subject: What is RISC and CISC? Reply with quote

What is RISC and CISC.... also tell the difference between them?

which one is better and why?
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goldengul20
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Joined: 25 Apr 2008
Posts: 55
Location: Wah Cantt.

PostPosted: Wed Dec 17, 2008 4:16 pm    Post subject: Reply with quote

well ...... this question is usually asked in interviews, not this way but some how......

CISC: Complex Instruction Set Computer
RISC: Reduced Instruction Set Computer

CISC was introducted earlier, 8051 is CISC whom we know well. Infact there are some instruction what used more than ONE Cycle to execute e.g. MULT (Multiplication) but in RISC (PIC, AVR, ARM etc. )all instructions execute in ONE Cycle so faster.........

Secondly very important aspeact is that RISC controllers have pipelined stages......... so extremely efficient..........
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