Tài liệu một số câu hỏi dành cho máy tính

A computer may be defined as a machine which accepts data froman input device, processes it by performing arithmetical andlogic operations in accordance with a program of instructionsand returns the results through an output unit.
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Tài liệu một số câu hỏi dành cho máy tính 1 Computersystem ComputerSystemBookI:computersystemfundamentals.Chapter1:INTRODUCTIONTOCOMPUTER.Question1.Whatisacomputer?Acomputermaybedefinedasamachinewhichacceptsdatafroman input device, processes it by performing arithmetical andlogic operations in accordance with a program of instructionsandreturnstheresultsthroughanoutputunit.A computer is basically an electronic machine operating oncurrent.Question2.ComponentsofaComputersystem?Acomputersystemcomprisesofthefollowingcomponents: 1. CentralProcessingUnit(CPU). - CPUistheheartofthewholesys - CPUconsistsofthe: • controlunit (CU) • arithmeticlogicunit (ALU) • accumulator (ACC) • programcounter(PC) • instructionregister (IR) • memoryaddressregister (MAR) • memorydataregister (MDR) • statusregister (SR) • generalpurposeregister - ThefunctionofeachcomponentsofCPU: • Controlunit: control and coordinate all hardware functionsoftheCS. examine and decode all program instructions tothecomputerandinitiatetheirexecution bysendingtheappropriatesignals. • ALU: performs all arithmetic and logic comparision two valuesfunctionsrequiredbycomputer. • ACC: 2 hol the first operand of the tem porary ds resu lt ofthe ALU . • PC : conta i s the addofthe nexti n nstru ction to beexcuted . • I : R conta i s the curren t i n nstru ction to be executed . M ai nm em ory •M AR: hol the address l ds ocati to orfrom w hi on ch data i to betransfe rred s • M DR: conta i s the data to be w ri n tten to or read outofthe addressed l ocati .on • SR : keeps track of the status of the accum al ator. • G eneralPurposeRegi ste r: forgenera lpurposeprocedures. Please refe r to di ram for an illu stra tin of the basi ag c com ponentsofthe CPU . CPUI NT Contro lunitE Arithm eti Log i Uni c c tRN Accum ul atorA Program Couter L to m ai n Instru cti Regi on ste r BU m em oryS M em oryAddressRegiste r M em oryD ataRegiste r Status Registe r G eneralPurposeRegiste r Basi com ponentsofaCPU . c 3 Contro lUnitInpu tUnit ALUO utputUnit ...