Abstract: Notes on learning the principles of computer school curriculum, Cipian describes instructions.
14 instruction abbreviation
CPU, PC, IR, CU, ALU, ACC, MQ, X, MAR, MDR, I / O, MIPS, CPI, FLOPS
solution: a comprehensive answer should be divided English name, Chinese name, Chinese interpretation of three parts .
CPU - Central Processing Unit, central processing unit (device), see question 7;
the PC - Program Counter, the program counter, the current storage address of the instruction to be executed, and automatically counting the next instruction address counter is formed;
IR-- instruction register,
the instruction register, the instruction currently being executed is stored in a register;
the CU - control unit, the control unit (means), operation of the micro controller means for generating a sequence of commands for the controller of the core member;
the ALU - Arithmetic Logic unit, arithmetic logic unit, the arithmetic logic unit to complete the arithmetic logic operation;
the ACC - accumulator, accumulator, the operator holding the operand before the operation, the register stores the arithmetic operation result;
the MQ - Multiplier Quotient-the register , multiply quotient register, while storing the multiplier multiplication, division store's register.
This letter does not specifically refer X-- acronym meaning, may be used as either component name, this indicates the operand register, i.e. one of the working register in the arithmetic unit, for storing operands;
the MAR - the Address the Register Memory, Memory address register, to be used to store the memory address register accesses the storage unit;
MDR - the register the data memory, the data buffer memory, a main memory unit is read out from the used storage, or writing a memory cell data register;
I / O - Input / Output equipment , input / output devices as a general term for the input and output devices for conversion and transfer of a computer internal and external information;
the MIPS - Million Instruction Per Second, the implementation of one million per second number of instructions, a unit of measurement for the computing speed indicators;
