CISC :- CISC stands for complex instruction set computer.
RISC :- RISC stands for reduced instruction set computer.
| Sr. No. | CISC | RISC |
|---|---|---|
| 1. | Complex instruction set computer | Reduced instruction set computer |
| 2. | It has large number of instruction | It has small number of instruction of fixed length |
| 3. | Complex instruction take multiple clock cycle | Single cycle instruction |
| 4. | Complex & variable length instruction | Simple length instruction |
| 5. | Less register are used | More register are used |
| 6. | Compound addressing mode | Limited addressing mode |
| 7. | Required a minimum amount of RAM | Required more RAM |
| 8. | Instructions are executed by microprogram | Instructions are executed by hardware |
| 9. | Pipelining is difficult | Pipelining is easy |
| 10. | Example : PIC microcontroller from microchip, ARM, Power PC etc. | Example : 8085, 8086, 8051 etc. |
