The vlsi technology became ulsi ultra large scale

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Unformatted text preview: chips, and the capacity of main memory and hard disk continued in the fifth generation. The VLSI technology became ULSI (Ultra Large Scale Integration) technology in the fifth generation resulting in the production of microprocessor chips having ten million electronic components. In fact, the speed of microprocessors and the size of main memory and hard disk doubled almost every eighteen months. The result was that many of the features found in the CPUs of large mainframe systems of the third and fourth generations became part of the microprocessor architecture in the fifth generation. This ultimately resulted in the availability of very powerful and compact computers becoming available at cheaper rates and the death of traditional large mainframe systems. Due to this fast pace of advancement in computer technology, we see more compact and more powerful computers being introduced almost every year at more or less the same price or even cheaper. Notable among these are portable notebook computers which give the power of a PC to their users even while travelling, powerful desktop PCs and workstations, powerful servers, and very powerful supercomputers (see Chapter 20 for a detailed description of these types of computers). Storage technology also advanced very fast making larger and larger main memory and disk storage available in newly introduced systems. Currently, PCs having 256 Megabytes (MB) of main memory and 4 to 20 Gigabytes (GB) of hard disk capacity are common. Similarly, workstations having 4 Gigabytes of main memory and few tens of Gigabytes of hard disk capacity are common. Larger hard disk space (of the order of few hundred Gigabytes) with better in-built reliability is now being supported with RAID (Redundant Array of Inexpensive Disks) technology that allows a bunch of disks to be configured as a single large disk. During the fifth generation, optical disks also emerged as a popular portable mass storage media. They are more commonly known as CD-ROM (Compact Disk - Read Only Memory) because they...
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This document was uploaded on 04/07/2014.

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