Monday, November 5, 2018

System Architecture.

Friday 2/11/18


Von Neumann Architecture-The von Neumann architecture also known as the von Neumann model or Princeton architecture is a computer architecture.


MAR(Memory address register)- In a computer, the Memory Address Register is the CPU register that either stores the memory address from which data will be fetched from the CPU, or the address to which data will be sent and stored.


MDR(Memory data register)-The Memory Data Register or Memory Buffer Register is the register of a computer's control unit that contains the data to be stored in the computer storage , or the data after a fetch from the computer storage.


Program Counter-A program counter is a register in a computer processor that contains the address (location) of the instruction being executed at the current time.


Accumulator-In a computer's central processing unit (CPU), an accumulator is a register in which intermediate arithmetic and logic results are stored.


ALU(Arithmetic logic unit)-An arithmetic logic unit is a combinational digital electronic circuit that performs arithmetic and bitwise operations on integer binary numbers.


CU(Control unit)-A control unit (CU) handles all processor control signals
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Cache-Cache memory is extremely fast memory that is built into a computer’s central processing unit (CPU), or located next to it on a separate chip.


Fetch/Execute-An instruction cycle is the basic operational process of a computer. It is the process by which a computer retrieves a program instruction from its memory, determines what actions the instruction dictates, and carries out those actions.


Busses-A wire that carries information from one place to another.