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Lecture notes on computer architecture

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Lecture Notes on Computer Architecture Firoz Mahmud Assistant Professor, Dept. of CSE, RUET, Rajshahi. Internal connection between processor & memory: Fig: Internal Connection between Processor & Memory. MAR:  MAR means Memory Address Register.  It holds the address of the main memory from where data is to be transferred. PC:  PC means Program Counter.  It holds the address of the next instructions. IR:  IR means Instruction Register.  It stores the instruction that is currently being executed.  It gives the operation to the CU to generate the timing signal that controls the execution. MDR:  MDR means Memory Data Register / Buffer Register.  It holds the data which write into / Read out of address location. Register:  General purpose register R0 through Rn+1 is used for storing data. CU:  CU means Control Unit.  The memory, arithmetic & logic, input & output units store & process information & perform input / output operation. These operation units must be co-ordinate in same way. This is the task of the CU.  Send control signal to other units and sense their state. ALU:  ALU means Arithmetic Logic Unit.  It perform the arithmetic operation like addition, subtraction etc. Bus:  It is a common path way connecting two or more devices.  It is a shared transmission medium.  At a time only one device should be transmitted signal. Width of Bus: Width of Bus means at a time how many amount of data (bit) can be transferr ...
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