NoobToProLearner

Types of Stored Program Computers A computer with a Von Neumann architecture stores data and instructions in the sa me memory (refer Figure 1.12(a)). There is a serial machine in which data and instructions are selected one at a time. Data and instructions are transferred to and from memory through a shared data bus. Since there is a single bus to carry data and instructions, process execution becomes slower. Later Harvard University proposed a stored program concept in which there was a separate memory to store data and instructions (refer Figure 1.12(b)). Instructions are selected serially from the instruction memory and executed in the processor. When an instruction needs data, it is selected from the data memory. Since there are separate memories, execution becomes faster.