Von Neumann Architecture (OCR GCSE Computer Science): Flashcards

Data and instructions stored in same memory

Memory Address Register

Memory address of data or instruction

Memory Data Register

Data fetched from or to be written to memory

MAR stores address, MDR stores data

Holding actual information being processed

Holding reference to specific location in memory

Program Counter

Address of next instruction to be executed

Automatically increments

Accumulator

Intermediate results of arithmetic and logic operations

Buffer between CPU and memory for data transfer