欢迎来到天天文库
浏览记录
ID:6816901
大小:510.50 KB
页数:31页
时间:2018-01-26
《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ComputerControlTechnologyAcomputerstructureandfunctionThissectionintroducestheinternalarchitectureofacomputeranddescribeshowinstructionsarestoredandinterpreteda
2、ndexplainshowtheinstructionexecution30无锡科技职业学院英文资料翻译cycleisbrokendownintoitsvariouscomponents.Atthemostbasiclevel,acomputersimplyexecutesbinary-codedresults.Forageneral-purposeprogrammablecomputer,fournecessaryelementsarethememory,centralprocessingunit(CPU,orsimplyprocessor
3、),anexternalprocessorbus,andaninput/outputsystemasindicatedinFig.A-1.Thememorystoresinstructionsanddata.TheCPUreadsandinterpretstheinstructions,readsthedatarequiredbyeachinstruction,executestheactionrequiredbytheinstruction,andstorestheresultsbackinmemory.Oneoftheactionstha
4、tisrequiredoftheCPUistoreaddatafromorwritedatatoanexternaldevice.Thisiscarriedoutusingtheinput/outputsystem.Theexternalprocessorbusisasetofelectricconductorsthatcarriesdata,addressandcontrolinformationbetweentheothercomputerelements.ThememoryThememoryofacomputerconsistsofas
5、etofsequentiallynumberedlocations.Eachlocationisaregisterinwhichbinaryinformationcanbestored.The“number”ofalocationiscalleditsaddress.Thelowestaddressis0.Themanufacturerdefinesawordlengthfortheprocessorthatisanintegralnumberoflocationslong.Ineachwordthebitscanrepresenteithe
6、rdataorinstructions.FortheIntel8086/87andMotorolaMC6800microprocessors,awordis16bitslong,buteachmemorylocationhasonly8bitsandthustwo8-bitlocationsmustbeaccessedtoobtaineachdataword.Inordertousethecontentsofmemory,theprocessormustfetchthecontentsoftherightlocation.Tocarryout
7、afetch,theprocessorplaces(enables)thebinary-codedaddressofthedesiredlocationontotheaddresslinesoftheexternalprocessorbus.Thememorythenallowsthecontentsoftheaddressedmemorylocationtobereadbytheprocessor.Theprocessoffetchingthecontentsofamemorylocationdoesnotalterthecontentso
8、fthatlocation.30无锡科技职业学院英文资料翻译InstructionsinmemoryInstructionsstoredinmemoryarefet
此文档下载收益归作者所有