Data Bases • Custom Term Papers • Free Term Papers • Free Research Papers • Free Essays • Free Book Reports • Plagiarism? Links • Top 100 Term Paper Sites • Top 25 Essay Sites • Top 50 Essay Sites • Search 97,000 Papers @ DirectEssays.com • Search 101,000 Papers @ ExampleEssays.com • Search 90,000 Papers @ MegaEssays.com Free Essays • Term Paper Sites • Chuck III's Free Essays • Free College Essays • TermPaperSites.com • Free Essays • My Term Papers • Essay World • Planet Papers	Search Lots of Essays Back to Subjects - Computers ParityNonparity Check ParityNonparity Check Early transmission codes had a serious problem in that a bit could be lost or gained in transmission because of an electrical or mechanical failure/ If the loss went undetected, the character received on the other end of the lime was incorrect. To Prevent this from happening, a parity check system was developed. Each character is represented by a byte consisting of a combination of intelligence bits (seven bits in ASCII and eight bits in EBCDIC) and an additional bit called a check or parity Even parity codes place a check bit with each byte that contains an uneven number of 1 bits. (Remember that a bit is either 1 or o). Because the check bit is transmitted only with characters composed of an uneven number of 1 bits,all characters transmitted will have n even number of 1 bits. The check bit is transmitted to and from the computer along with character code. If a bit is lost (or added) in transmission, the system will detect its loss. An uneven number of 1 bits received in a code string composed of even bits will signal an error. Odd Parity codes add a check bit to code combinations that have an even number of 1 bits. Thus,all characters transmitted have an odd number of bits. Odd and even parity care similar in nature. They are both designed to signal an error in the even Bibliography: Word Count: 243
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