1、誠信應(yīng)考，考試作弊將帶來嚴(yán)重后果!華南理工大學(xué)期末考試«計(jì)算機(jī)組成與體系結(jié)構(gòu)試卷A注意事項(xiàng)：1.考前請(qǐng)將密封線內(nèi)填寫清楚；2.所有答案請(qǐng)直接答在試卷上；3.考試形式：閉卷；4.本試卷共三大題，滿分100分，考試時(shí)間120分鐘。題號(hào)一二三四五總分得分評(píng)卷人I.單選題（2pointseachForeachquestioninthissection,choose1answer.Choosethebestanswer.1. Whichoneofthesewillcauseoverflowinsignedaddition?.)題 答 不 內(nèi) 線 封 密 (A. Ifthereisacarryo

2、utoftheleastsignificantbit.B. Ifthereisacarryoutofthemostsignificantbit.C. Ifaddingtwonegativenumbersresultsinapositiveresult.D. Ifthemagnitudeoftheresultissmallerthanthemagnitudeofthesmalleradded.2. Amajoradvantageofdirectmappingofcacheisitssimplicity.Themaindisadvantageofthisorganizationisthat.A.

3、Itdoesnotallowsimultaneousaccesstotheintendeddataanditstag.B. Itsmoreexpensivethanmoreothertypesofcacheorganizations.C. Thecachehitratioisdegradediftwoormoreblocksusedalternatelymapontothesameblockframeinthecache.D. Itsaccesstimeisgreaterthanthatofothercacheorganizations.3. Inaninterruptprocess,theu

4、sageofsavingPCis.A. tomakeCPUfindtheentryaddressoftheinterruptserviceroutineB. tocontinuefromtheprogrambreakpointwhenreturningfrominterruptC. tomakeCPUandperipheralsworkinginparallelD. toenableinterruptnesting4. Whatistheeffectofthefollowinginstruction?.moveecx,ebp+8A. Add8tothecontentsofebpandstore

5、thesuminecx.«計(jì)算機(jī)組成與體系結(jié)構(gòu)試卷第1頁共11頁B. Add8tothecontentsofebp,treatthesumasamemoryaddressandstorethecontentsatthataddressiecx.C. Add8tothecontentsofthememorylocationwhoseaddressisstoredirebpandstorethesuminecx.D. Addthecontentsofebptothecontentsofmemoryaddress8andstorethesuminecx.5. Thepartofmachin

6、elevelinstruction,whichtellsthecentralprocessorwhatwastobeDoneis.A.operationcodeB.addressC.operandD.noneoftheabove6. Inacachememorysystem,forawriteoperation,ifthecachelocationandthemainmemorylocationareupdatedsimultaneously,thenitusestechnique.A.write-backB.write-outC.write-allocationD.write-through

7、7. istheprocessbywhichthenextdevicetobecomethebusmasterisselectedandbusmastershipistransferredtoit.A.BusphaseB.BusarbitrationC.BustimingD.Bustransceiver8. Whichoneofthefollowingaboutbenefitsofvirtualmemoryisnottrue?.A.providelargeaddressspaceB.relieveprogrammersfromburdenofoverlaysC.resolveinternalf

8、ragmentationD.simplifyrelocation9. Aharddiskwith5plattershas2048tracks/platter,1024sectors/track(fixednumberofsectorspertrack),and512bytesectors.Whatisitstotalcapacity?.A.5GBB.10GBC.15GBD.20GB10. TranslatetheIEEEsingle-precisionfloatingpointnumbersshownbelowtotheirdecimalequivalent.|1|1同0IoTl|T|1|00

9、10|0|0|0|石0|0|山0|00|。|00|0|萬0皿|A.+832B.-832C.+416D.-41611. Inmicroprogram-controlledmachines,therelationshipbetweenthemachineinstructionandthemicroinstructionisA. amachineinstructionisexecutedbyamicroinstructionB. amicroinstrucitoniscomposedofseveralmachineinstructionsC. amachineinstructionisinterpr

10、etedbyamicroroutinecomposedofmicroinstructionsD. amicroroutineisexecutedbyamachineinstruction12. Inthefollowingstatements,isnottrue.A. Branchinstructionscancausedelaysinpipelinedprocessors,becausetheprocessorcannotdeterminewhichinstructiontofetchnextuntilthebranchhasexecuted.B. Structuralhazardsoccu

11、rwhentheprocessorhardwareisnotcapableofexecutingalltheinstructionsinthepipelinesimultaneously.C. Pipeliningincreasesprocessorperformancebydecreasingtheexecutiontimeofaninstruction.D. Datahazardsoccurwhenthepipelinechangestheorderofread/writeaccessestooperandssothattheorderdiffersfromtheorderseenbyse

12、quentiallyexecutinginstructionsontheunpipelinedmachine.13. InterruptsgeneratedbythekeyboardwillinterrupttheCPUA. onlywhentheCPUisexecutingabusy-loop.B. onlywhentheCPUisnotdoinganyusefulwork.C. aftertheCPUhasturnedontheinterrupt-enableflag.D. whentheCPUisexecutingtime-criticalwork.14. Inacomputerwith

13、amicroprogrammablecontrolunittheperiodoftheclockisdeterminedby.A. thedelayofthecontrolmemory.B. thedelayofthemainmemory.C. thedelayoftheALU.D. thesumoftwooftheabovedelays.15. Ifthe2010versionofacomputerexecutesaprogramin200sandtheversionofthecomputermadeintheyear2011executesthesameprogramin120s,then

14、the«計(jì)算機(jī)組成與體系結(jié)構(gòu)試卷 第5頁共11頁speedupthatthemanufacturerhasachievedoverthetwo-yearperiodjsA. 1.44B. 1.78 C. 1.53 D. 1.67II.簡(jiǎn)答題(5pointseach)1. WhatisthedifferencebetweentheDMAandinterrupt-drivenmethods?(fromtwowaystoanalyze:(1)WhattimeshouldCPUresponseDMArequestorinterruptrequest?(2)WhichworkshouldCPU

15、needtodowhenitacknowledgesDMArequestorinterruptrequest?Solution:2. Aset-associativecacheconsistsofatotal32blocksdividedinto4-blocksets.Themainmemorycontains1024blocks,eachconsistingof64words.(1) Howmanybitsarethereinamainmemoryaddress?(2) HowmanybitsarethereineachoftheTAGSET,andWORDfields?Solution:3

16、. ThetwounsignedbinarynumbersshownbelowaretobemultipliedusingamultiplierthatusesBoothsAlgorithm:10011010X01110111(1) Howmanybitswillbeneededtostoretheproductofthesetwonumbers?(2) HowmanyadditionsandsubtractionswillbeperformedbytheBoothsAlgorithmmultiplierrespectively?Solution:4. Whataretheadvantages

17、anddisadvantagesofhardwiredandmicroprogrammedcontrol?Solution:III.綜合題(10pointseach)1. Assumethatacomputerinstrsuctionlengthis16-bit,anditsoperandaddressis6-bit.Supposethedesignersneedtwo-addressinstructions,one-addressinstructionsandzero-addressinstructions.Howshouldwedesigntheinstructionformat?Ands

18、pecifythenumbersofeachtypeofinstructioncanbedesigned.Solution:計(jì)算機(jī)組成與體系結(jié)構(gòu)試卷第 7 頁 共 11 頁2. Considerthatfloating-pointnumbersarerepresentedina12-bitformat.Thescalefactorhasanimpliedbaseof2anda5-bit,excess-15exponent,withthetwoendvalueof0and31usedtosignifyexact0andinfinity,respectively.The6-bitmantissai

19、snormalizedasintheIEEEformat,withanimplied1totheleftofthebinarypoint.(1) Representthenumbers-0.6875and+19inthisformat.(2) PerformSubOperationontheoperandsA=010001011011,B=101111101010.(Note:Usingroundingasthetruncationmethodintheanswers.Writethecomputationprocess!)Solution:3. Alogiccircuitisneededto

20、implementtheprioritynetworkshownlikefigurebelow.Thenetworkhandlesthreeinterruptrequestlines.WhenarequestisreceivedonlineINTRi,thenetworkgeneratesanacknowledgementonlineINTAi.Ifmorethanonerequestisreceived,onlythehighest-priorityrequestisacknowledged,wheretheorderingofpriorityis:priorityofINTR1>pr

21、iorityofINTR2>priorityofINTR3.INTR1Priorityarbitrationcircuit(1) GiveatruthtableforeachoftheoutputsINTA1,INTA2,andINTA3.(2) GivelogicexpressionsofINTA1,INTA2,INTA3andalogiccircuitforimplementingthisprioritynetwork.Solution:4. Thefollowingfiguregivespartofthemicroinstructionsequencecorrespondingtooneofthemachineinstructionsofamicroprogrammedcomputer.MicroinstructionBisfollowedbyC,D,F,orI,dependingonbitsIR6,IR5andIR4ofthemachineinstructionregister.Givethepossibleimplementati