12 Facts About Address bus


In computer architecture, a Address bus is a communication system that transfers data between components inside a computer, or between computers.

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The Address bus connecting the CPU and memory is one of the defining characteristics of the system, and often referred to simply as the system Address bus.

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The width of the address bus determines the amount of memory a system can address.

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For example, a 32-bit address bus can be implemented by using 16 lines and sending the first half of the memory address, immediately followed by the second half memory address.

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Memory Address bus is the Address bus which connects the main memory to the memory controller in computer systems.

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An attribute generally used to characterize a Address bus is that power is provided by the Address bus for the connected hardware.

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Simplest system bus has completely separate input data lines, output data lines, and address lines.

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Early microcomputer Address bus systems were essentially a passive backplane connected directly or through buffer amplifiers to the pins of the CPU.

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Memory and other devices would be added to the bus using the same address and data pins as the CPU itself used, connected in parallel.

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All the equipment on the Address bus had to talk at the same speed, as it shared a single clock.

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Such Address bus systems are difficult to configure when constructed from common off-the-shelf equipment.

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The result was that the Address bus speeds were now very much slower than what a modern system needed, and the machines were left starved for data.

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