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Input/Output Services:
Every operating system, large or small, provides input/output services for each device in the system. The operating system includes I/O device driver programs for each device installed on the system. These drivers provide services to the file management system and are also available, through the API, to other programs for their use. The I/O device drivers accept I/O requests and perform the actual data transfers between the hardware and specified areas of memory.
Devices drivers for newly installed devices are added and integrated into the operating systems. In Windows, this capability is known as plug-and-play.
BUSES It can be seen from Figure 4 that there are three buses - the data bus, the address bus, and the control bus. Each bus consists of a group of parallel wires. The da
In many respect threads operate in the similar way as that of processes. A number of the similarity and differences are: Similarities • Similar to processes threads share CPU and o
ANALOGUE COMPUTERS A computer is basically a problem-solving device. In aircraft radio systems the problem to be solved is concerned with navigation, in that given certain inf
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Laser Printers: These printers can print a whole page at one command, offer highest quality and can combine text, graphics, etc. They are generally restricted to A4 paper and
Data buses: The availability of reliable digital semi-conductor technology has enabled the inter-communication task between different equipment to be significantly improved. P
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• The key to preventing problem involving shared storage is get some way to prohibit more than one process from reading and writing the shared data concurrently. That part of the p
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