Modern Trends in Computer Hardware

2782 Words Jan 26th, 2011 12 Pages

1. The history of computing hardware is the record of the ongoing effort to make computer hardware faster, cheaper, and capable of storing more data.
2. Computing hardware evolved from machines that needed separate manual action to perform each arithmetic operation, to punched card machines, and then to stored program computers. The history of stored program computers relates first to computer architecture, that is, the organization of the units to perform input and output, to store data and to operate as an integrated mechanism. Secondly, this is a history of the electronic components and mechanical devices that comprise these units. Finally, we
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8. In a network, the master scheduler controls the data traffic. If data is to be transferred, the requesting computer sends a message to the scheduler, which puts the request into a queue. The message contains an identification code which is broadcast to all nodes of the network. The scheduler works out priorities and notifies the receiver as soon as the bus is available.
9. The identified node takes the message and performs the data transfer between the two computers. Having completed the data transfer the bus becomes free for the next request in the scheduler's queue. a. Advantage: Any computer can be accessed directly and messages can be sent in a relatively simple and fast way. b. Disadvantage: A scheduler is required to organize the traffic by assigning frequencies and priorities to each signal.


10. "Third generation" buses have been emerging into the market since about 2001, including Hyper Transport and InfiniBand. They also tend to be very flexible in terms of their physical connections, allowing them to be used both as internal buses, as well as connecting different machines together. This can lead to complex problems when trying to service different requests, so much of the work on these systems concerns software design, as opposed to the hardware itself. In general, these third generation buses tend to look more like a
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