Computer Organization and Architecture2019-202 marksProgram Control, Reduced Instruction Set Computer, Pipelinin
Write the differences between RISC and CISC.
Write the differences between RISC and CISC.
RISC (Reduced Instruction Set Computer) uses a small set of simple instructions. CISC (Complex Instruction Set Computer) uses many powerful, complex instructions.
| Point | RISC | CISC |
|---|---|---|
| Instruction set | Small, simple | Large, complex |
| Instruction length | Fixed | Variable |
| Execution | Mostly one clock cycle | Many clock cycles |
| Memory access | Only LOAD and STORE | Most instructions |
| Control unit | Hardwired | Microprogrammed |
| Registers | Many | Few |
| Example | ARM, MIPS | Intel x86, VAX |
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