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bus
BUS
Buses have grown and evolved over the years in an effort to match the performance of all the other computer components. Even so, the evolution of the bus has been surprisingly slow compared to other technologies. Most computers sold today still have an Industry Standard Architecture ISA bus that will accept computer cards developed for the original IBM PC in the early 1980s.
There have been a combination of primary reasons for this bus prolonged existence:
As the speed of central processing units (CPUs) and RAM increased, it became more important to isolate the path between processor and memory. A replacement for the standard system bus, called Dual Independent Bus (DIB), was created. DIB replaced the single system bus with a frontside bus and a backside bus. The backside bus had one purpose: to provide a direct, fast channel between the CPU and the Level 2 cache. The frontside bus connected the system memory, via the memory controller, to the CPU, and the other buses to the CPU and system memory.
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bus
BUS
Buses have grown and evolved over the years in an effort to match the performance of all the other computer components. Even so, the evolution of the bus has been surprisingly slow compared to other technologies. Most computers sold today still have an Industry Standard Architecture ISA bus that will accept computer cards developed for the original IBM PC in the early 1980s.
There have been a combination of primary reasons for this bus prolonged existence:
- There is a need for long-term compatibility with a large number of hardware manufacturers.
- Before the rise of multimedia, few hardware peripherals fully utilized the speed of the bus.
As the speed of central processing units (CPUs) and RAM increased, it became more important to isolate the path between processor and memory. A replacement for the standard system bus, called Dual Independent Bus (DIB), was created. DIB replaced the single system bus with a frontside bus and a backside bus. The backside bus had one purpose: to provide a direct, fast channel between the CPU and the Level 2 cache. The frontside bus connected the system memory, via the memory controller, to the CPU, and the other buses to the CPU and system memory.
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