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What is an accumulator in microprocessor?
the accumulator is an 8-bit register then is part of the arithmetic/logic unit(ALU). this register is used to store to store 8-bit data and to perform arithmetic & logical operation. the result of an operation is stored in the accumulator. the accumulator is also identified as register A.
What is the function of TMP register of ALU in 8085 microprocessor?
The TMP register in the 8085 is used to hold temporary results of operations. You cannot directly manipulate it, so you should just pretend it is not there.
Which unit of computer performs arithmetic and logical functions?
The ALU (arithmetic logic unit) An ALU loads data from input registres, an external Control Unit then tells the ALU what operation to perform on that data, and then the ALU stores its result into an output register. Other mechanisms move data between these registers and memory.
What is the structure of each microprocessors?
the structure of microprocessor consists of ALU, Register array unit and control unit.
Different parts of the system unit or CPU?
diffent types of register, memory,ALU,timing and control unit
Where registers are located?
A register is a storage location within the CPU as part of Datapath. CPU consists of datapath and control unit. Datapath comprises of register file (which consists registers and logic ) ,ALU and memory.
Does the alu manage all activities inside the motherboard?
No. The Arithmetic Logic Unit hades basic mathematical operations such as addition, subtraction, multiplication, division as well as logical and register operations such as and, or, and bit shifting.
What is combinational alu?
combinational ALU
What is the difference between combinational alu and sequential alu?
There is one main difference between combinational ALU and sequential ALU. Combinational ALU depends only on present circuits, and sequential ALU depends on both the present and the past.
What are the steps to properly and completely execute an instruction?
1 Fetch Instruction from Memory 2 Decode Instruction and Fetch Operands 3 Perform ALU Operations 4 Memory Access (for load/store)5 Store ALU result to register file 6Update PC
What are the five stages in DLX pipeline in computer architecturect?
DLX is a simple pipeline architecture for CPU. It is mostly used in universities as a model to study pipelining technique.The architecture of DLX was chosen based on observations about most frequently used primitives in programs. DLX provides a good architectural model for study, not only because of the recent popularity of this type of machine, but also because it is easy to understand.Like most recent load/store machines, DLX emphasizes A simple load/store instruction setDesign for pipelining efficiencyAn easily decoded instruction setEfficiency as a compiler targetOperations There are four classes of instructions: Load/StoreAny of the GPRs or FPRs may be loaded and stored except that loading R0 has no effect.ALU OperationsAll ALU instructions are register-register instructions.The operations are :- add- subtract- AND- OR- XOR- shiftsCompare instructions compare two registers (=,!=,,=).If the condition is true, these instructions place a 1 in the destination register, otherwise they place a 0.Branches/JumpsAll branches are conditional.The branch condition is specified by the instruction, which may test the register source for zero or nonzero.Floating-Point Operations- add- subtract- multiply- divideAn Implementation of DLXImplementing the instruction set requires the introduction of several temporary registers that are not part of the architecture.Every DLX instruction can be implemented in at most five clock cycles. The five clock cycles are Instruction fetch cycle (IF)Instruction decode/register fetch (ID)Execution/Effective address cycle (EX)Memory access/branch completion cycle (MEM)Write-back cycle (WB)Detailed description of each follows:Instruction fetch cycle (IF):IR
What activities are carried out by the ALU?
The Arithmetic Logic Unit (ALU) is an essential component of a computer's central processing unit (CPU). It performs various operations related to arithmetic and logic. One of the primary activities of the ALU is arithmetic operations such as addition, subtraction, multiplication, and division. These operations are performed on binary numbers, which are represented in the form of bits. The ALU can perform these operations on two or more operands, depending on the instruction given by the CPU. The ALU also performs logical operations such as AND, OR, NOT, and XOR. These operations are used to manipulate the bits in the operands to produce a desired output. For example, the AND operation returns a 1 only if both the operands have a 1 in the same position. Besides these basic operations, the ALU also performs comparison operations. It compares two operands and produces an output indicating whether they are equal, greater than, or less than each other. The ALU also performs shift operations, which involve moving the bits in an operand left or right by a certain number of positions. Shift operations are useful in programming, where they can be used to manipulate data stored in registers. Finally, the ALU can also perform other operations such as incrementing and decrementing. These operations are used to modify the value of a register or memory location. In summary, the ALU performs a variety of operations related to arithmetic, logic, comparison, and manipulation of binary numbers. Its efficient operation is crucial for the overall performance of a computer's CPU.
