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ID:14397745
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时间:2018-07-28
《电气自动化专业毕业设计(论文)外文翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、无锡科技职业学院英文资料翻译英文资料翻译题目ComputerControlTechnology系别中德机电学院专业电气自动化技术班级xxxxxxxx学生姓名xxxxxxx学号xxxxxxxxx指导教师xxxxxxx2012年4月ComputerControlTechnologyAcomputerstructureandfunctionThissectionintroducestheinternalarchitectureofacomputeranddescribeshowinstructionsarestoredandinterpre
2、tedandexplainshowtheinstructionexecution30无锡科技职业学院英文资料翻译cycleisbrokendownintoitsvariouscomponents.Atthemostbasiclevel,acomputersimplyexecutesbinary-codedresults.Forageneral-purposeprogrammablecomputer,fournecessaryelementsarethememory,centralprocessingunit(CPU,orsimplyp
3、rocessor),anexternalprocessorbus,andaninput/outputsystemasindicatedinFig.A-1.Thememorystoresinstructionsanddata.TheCPUreadsandinterpretstheinstructions,readsthedatarequiredbyeachinstruction,executestheactionrequiredbytheinstruction,andstorestheresultsbackinmemory.Oneoft
4、heactionsthatisrequiredoftheCPUistoreaddatafromorwritedatatoanexternaldevice.Thisiscarriedoutusingtheinput/outputsystem.Theexternalprocessorbusisasetofelectricconductorsthatcarriesdata,addressandcontrolinformationbetweentheothercomputerelements.ThememoryThememoryofacomp
5、uterconsistsofasetofsequentiallynumberedlocations.Eachlocationisaregisterinwhichbinaryinformationcanbestored.The“number”ofalocationiscalleditsaddress.Thelowestaddressis0.Themanufacturerdefinesawordlengthfortheprocessorthatisanintegralnumberoflocationslong.Ineachwordtheb
6、itscanrepresenteitherdataorinstructions.FortheIntel8086/87andMotorolaMC6800microprocessors,awordis16bitslong,buteachmemorylocationhasonly8bitsandthustwo8-bitlocationsmustbeaccessedtoobtaineachdataword.Inordertousethecontentsofmemory,theprocessormustfetchthecontentsofthe
7、rightlocation.Tocarryoutafetch,theprocessorplaces(enables)thebinary-codedaddressofthedesiredlocationontotheaddresslinesoftheexternalprocessorbus.Thememorythenallowsthecontentsoftheaddressedmemorylocationtobereadbytheprocessor.Theprocessoffetchingthecontentsofamemoryloca
8、tiondoesnotalterthecontentsofthatlocation.30无锡科技职业学院英文资料翻译InstructionsinmemoryInstructionsstoredinmemoryarefet
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