PHERIPHERAL DEVICES

Math coprocessor

Alternatively referred to as a numeric coprocessor or a floating-point coprocessor, the math coprocessor is an optional processor add-on for the Intel 8086, 80386 and 80486 processors that allowed a computer to perform mathematical calculations more efficiently and faster, increasing the overall speed of a computer in many places. Today, all computer processors are released with a math coprocessor incorporated onto the processor. Below is a listing of earlier computer processors and their coprocessors.

Processor

Coprocessor

8086

8087

8088

8087

80286

80287

80386SX

80387SX

80386SL

80387SX

80386SLC

80387SX

80486SLC

80387SX

80486SLC2

80387SX

80386DX

80387DX

80486SX

80487SX, DX2/Overdrive

80487SX

Included FPU

80486SX2

DX2/Overdrive

Zip drive

A high-capacity floppy disk drive developed by Iomega Corporation. Zip disks are slightly larger than conventional floppy disks, and about twice as thick. They can hold 100 or 250 MB of data. Because they’re relatively inexpensive and durable, they have become a popular media for backing up hard disksand for transporting large files.

A Zip drive is a small, portable disk drive used primarily for backing up and archiving personal computer files. The trademarked Zip drive was developed and is sold by Iomega Corporation. Zip drives and disks come in two sizes. The 100 megabyte size actually holds 100,431,872 bytes of data or the equivalent of 70 floppy diskettes. There is also a 250 megabyte drive and disk. The Iomega Zip drive comes with a software utility that lets you copy the entire contents of your hard drive to one or more Zip disks.

In addition to data backup, Iomega suggests these additional uses:

  • Archiving old e-mail or other files you don’t use any more but may want to access someday
  • Storing unusually large files, such as graphic images that you need infrequently
  • Exchanging large files with someone
  • Putting your system on another computer, perhaps a portable computer
  • Keeping certain files separate from files on your hard disk (for example, personal finance files)

The Zip drive can be purchased in either a parallel or a Small Computer System Interface (SCSI) version. In the parallel version, a printer can be chained off the Zip drive so that both can be plugged into your computer’s parallel port.

Question No: (1) Define computers? Why computer is known as data processing system? 

What are the basic operations of Computer?                  

Answer: Computer: A  computer  is  a  programmable  machine  or  device  that  performs  pre-defined 

or programmed computations or controls operations that are expressible in numerical or logical

terms at high speed and with great accuracy.

Computer  is  a  fast  operating  electronic  device,  which  automatically  accepts  and  store input data,

processes them and produces results under the direction of step by step program.

Any Process  that  uses  a computer  program  will enter  data  and  summarize,  analyze  or otherwise

convert data into usable information. The process may be automated and run on a computer. 

It involves recording, analyzing, sorting, summarizing, calculating, disseminating and storing data. Thus

Computer is known as data processing system. 

Its various operations are:

1) It accepts data or instructions by way of input.

2) It stores data.

3) It can process data as required by the user.

4) It gives results in the form of output.

 What Are the Functions of a Coprocessor Chip?

Coprocessor chips, also known as floating-point units or FPUs, numeric processors and math processors, are found in many computers. They are located inside of a microprocessor and are composed of a series of special circuits; However, during the primitive era of computers, they were separate from the microprocessor.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s