计算机组成原理3

1、3.Softwareisequivalenttohardwareinlogic4.The reason of binary ion for information in a computer is it can 3.Softwareisequivalenttohardwareinlogic4.The reason of binary ion for information in a computer is it can easily s puterhardwareconsistsofcalculator,memory, controllerandI/O.6.Theuseofsorsignifi

2、edthedevelopmentI/O.B.a, instructions and data are purchased,B.terminology,B.11.Thesign-magnitudeionof0is12.Fixed numbercanbeopuredecimal(纯小数and13.In fixed operation, it will be overflow when the result exceeds the represent range of 14.A 15.Theaddition/subtractionalgorithmforsignmagnitudeionisrathe

3、r14.A 15.Theaddition/subtractionalgorithmforsignmagnitudeionisrather16.Thenumberhecomputersometimeswillbeoverflow,thefundamentalreasonthelimitedcomputerword17.The2scomplementionof-127is18.2scomplementionof0equalsto1scomplementionof-19.Theuseof2scomplementoperationisadoptedtosimplifythedesignof20.8-4

4、-2-1codeisbinary21.Calculatorhasmanycomponents,butdatabusisthekey22.Thecarrylook-aheadcircuitchip74182realizesthecarrylogicngroupsin23.ThelALUchip74181isa4-bitparalleladderwithcarrylook-ahead24.ALUusuallyhasaripple-carryadderinordertoimprovethe25.Thel4-bitALUchip74181canonlyperform16differentarithme

5、tic26.Exponent unit in floating calculator can realize addition, subtraction, multiplication 27.Exponent unit in floating calculator can realize operations of addition, subtraction edofsignbits,exponente,and29.InIEEE754standard,thevalueofexponentisrepresentedinedofsignbits,exponente,and29.InIEEE754s

6、tandard,thevalueofexponentisrepresentedins-12830.The exponent, E, of a floating number usually uses biased code ion, which moreconvenientforcomparingsizeorexponenta33.Register-Register Storage(RS)operand, the instruction set supportsSSA.B.36.Formatandfunctionofinstructionsetonlyaffectthehardstructur

7、eofapartinprogram control instruction represents the tis41.Countercan be used notonly for counting pulse, but alsoused for frequency divider(分频) usregisterstoretheresultofarithmetic43.InCPU, decoder isusedfor decodeofinstruction,addressingmodeand addressof44.The speed of a computer is related to fre

8、quency, and is also related to word length, architecture,45.Inacomputer,memoryandregisterslstore46.InCPU, theregister foringthenextinstructionis47.AninstructioncycleisedofsomeT48.Generally,serialregisterhasthefunctionofshift49.Theregisterusedtostorethecurrentinstructionbeingexecutedis50.Ifthefrequen

9、cyofacomputeristhehighest,thenitsspeedisthe achineinstructionretedandexecutedbyamicrocodeconsistingofasequenceB. 52.Theinstructioncycleforalltheoperationsisthe A.B.53.Mutually exclusive micro-operations are the52.Theinstructioncycleforalltheoperationsisthe A.B.53.Mutually exclusive micro-operations are the t execute parallel in a AB .54.CPUcycleisalsocalledclockcycle.ACPUcycleconsistsofsomemachine ABAseradoptsmicroprogrammedcontrolleriscalledmicro56.InstructioncycleisthetCPUfetchesaninstructionfrommemoryand executes误57.Everyinstructioncycle误east2CPU