Flashcards

Von Neumann Architecture

Lauren Blood Computing AS level English 11 cards

Cards in this deck (11)

1RegistorsAreas of memory inside the computer; they work at a fast speed so bottlenecks are not caused.
2Program Counter (PC)Keeps track of the memory location of the line being executed; always points to the next instruction being executed; allow the program to run in sequence.
3Memory Address Register (MAR)Stores the address of the data or instructions that are going to be fetched from or sent to.
4Memory Data Register (MDR)Stores data that has been fetched from or stored to memory.
5Current Instruction Register (CIR)Stores the most recently fetched instruction, waiting to be decoded and executed.
6Accumulator (ACC)Stores the results of calculations made by the Arithmetic Logic Unit (ALU).
7General Purpose RegistersAre used temporarily to store data being used rather than sending it back to RAM.
8BusesCommunication channels used to send data on the computer.
9Data BusCarries data between the processor and the RAM.
10Address BusCarries the address of the memory location being written to or read from.
11Control BusUsed to send control signals from the control unit.