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CISC RISC Emphasis on hardware Emphasis on software Includes multi-clock
complex instructions Single-clock,
reduced instruction only Memory-to-memory:
"LOAD" and "STORE"
incorporated in instructions Register to register:
"LOAD" and "STORE"
are independent instructions Small code sizes,
high cycles per second Low cycles per second,
large code sizes Transistors used for storing
complex instructions Spends more transistors
on memory registers RISC-Means Reduced Instruction Set Computer.aRisc
system has reduced number of instructions and more
importantly it is load store architecture were
pipelining can be implemented easily.Eg.ATMEL AVR
CISC-Means Complex instruction set architecure.A CISC
system has complex instructions such as direct
addition between data in two memory locations.Eg.8085
Simplicity of the instruction set means that they get processed faster (less branching). You get performance improvements if the gain in speed is not offset by the necessary increase in instructions.
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