System Structure commands

1. Instruction Set knowledge

Solution: the CPU uses the command control system, and the instruction set is dividedComplex Instruction Set CISCAndSimplified Instruction Set-ProteusWhere C/RISC is the abbreviation of complex/CED Instruction Set Computing

Main differences

The number of instruction sets in a reduced number. Each instruction uses the same length of bytes. Generally, 4 bytes are used, and the word boundary is applied to it. The field location is fixed, especially the location of the operation code.

Multiple and complex CISC commands with different command lengths

Commonly usedDEC Alpha, arc, arm, AVR, MIPS, PA-RISC, Power Architecture (PowerPC, powerxcell ),ISCSIAnd so on

CDC, system/360, VAX, PDP-11, Motorola, using CISC,X86And so on