04- Store Program Control Concept- General Purpose Computer System



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"The Modified Von-NeuMann Architecture"

"Adding A SYSTEM BUS"

"Todays General computer System"

It is a basically modern day architecture representative

The Processor Subsytem (i.e the CPU) now consists of the ALU and control unit and various processor registers.

• The processor, memory and I/O subsystems are interconnected by the system bus, which consists of data, address and control-status lines.

general purpose computer system

Practical systems may differ from the single bus architecture in sense that it may be configured round Multiple Buses.

For instance, there may be a memory bus that connects the processor to memory subsystem and an I/O bus to Interface I/O devices to the processor, forming a two-bus structure.

Further:- It is possible to configure a system with several I/O buses where in each bus may interface one type of I/O device to the processor.

Since Multiple Bus structures allow simultaneous operations on the buses, a higher throughput is possible , compared to single bus architecture.

However, because of the multi-buses the system complexity increases. Thus , a speed/Cost trade off is required to decide on the system architecture or structure.


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