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Disadvantages of using a bus structure
Since buses are set up between the main memory and/or devices, the speed and efficiency of information transmission in the microcomputer system are improved. However, since there is no direct path between the external device and the main memory, the information exchange between them must be transferred through, thus reducing the work efficiency or increasing the occupancy rate. Generally speaking, the less intervention required when a peripheral is working, the better. The less intervention, the lower the occupancy rate of this device, indicating that the device is more intelligent. This is the main shortcoming of the dual bus structure. It also includes the use of bus transmission with time sharing. When multiple master devices apply for the use of the bus at the same time, bus arbitration must be performed.
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