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Unformatted text preview: city of a workstation is also much more
(typically 4 GB to several tens of GB) as compared to the hard disk capacity of
PCs (typically few GB).
Display facility. Most workstations have a large-screen (19 inch or more)
color monitor capable of displaying high-resolution graphics. Thus, the color and
graphics adapter card, which is optional for PCs, is available by default in
workstations. PCs normally use monitors having smaller screen (17 inch or less).
4. Processor design. Unlike the microprocessor chips used in PCs for CPU, the
CPU chips used in workstations are designed using a special technology known as
Reduced Instruction Set Computers (RISC). The basic idea behind the RISCbased architecture is that the speed of the processor can be greatly increased by:
Eliminating infrequently used programmed instructions from the set of
instructions supported by a CPU chip,
- Making all the instructions of equal length, and
- Reducing the number of addressing modes.
Popular RISC processors used in workstations are ALPHA (used in DEC-ALPHA
workstations), RIOS (used in IBM workstations), SPARC (used in SUN
workstations), and PA-RISC (used in HP workstations).
Operating system. Unlike PCs which can run any of the five major OSs - MSDOS, MS-Windows, Windows-NT, Linux and Unix, all workstations generally
run the Unix operating system or a variation of it, such as AIX (used in IBM
workstations), Solaris (used in SUN workstations), and HP-UX (used in HP
workstations). Also, unlike most operating systems for PCs, which are single-user
oriented, a workstation's operating system is designed to enable it to support a
6. Network interface card.
Most workstations have built-in hardware to connect to a Local Area Network
(LAN). As already discussed before, this facility is normally optional in case of a PC. Workstations generally cost from a few lakhs to few tens of lakhs of rupees
depending on their capabilities and capacity. The biggest manufacturer of
workstations is Sun Microsystems. Other manufacture...
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This document was uploaded on 04/07/2014.
- Spring '14