电气自动化专业毕业设计（论文）外文翻译

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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