The system bus is a data transmission line made up of cables and connectors that connects a computer's processors to its primary memory. The bus serves as a conduit for data and control signals travelling between the computer system's primary components. The function of the system bus is to combine the functions of the three primary buses: data, address, and control. Each of the three vehicles has its own personality and set of tasks.
The system bus combines the following functions of the three primary buses:
The control bus transports control, timing, and coordination signals for managing the system's many functions.
The address bus is used to define memory locations for conveyed data.
The data bus is a bidirectional route that transports data from the processor to the
memory and peripherals.
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