What is CISC ? Explain its characteristics.
CISC stands for Complex Instruction Set Computer. It refers to a type of computer architecture where the processor is designed to execute a rich set … Read more
COA PYQ
Write a short note on shift micro-operations.OR List and explain different types of shift micro-operation.
Shift micro-operation : Shift micro-operations in computer architecture are those which are used in serial shifting of data present in a register. Shift micro-operations move … Read more
Write short note on arithmetic micro-operation.
Arithmetic micro-operations are fundamental operations performed on binary numbers within a computer’s central processing unit (CPU). These operations include addition, subtraction, increment, and decrement. Addition: … Read more
Write a short note on register transfer micro-operation.
Register transfer micro-operations are fundamental operations in digital systems that involve the transfer of information from one register to another. Basic symbols for register transfers: … Read more
Describe micro-operation and enlist its types.
Micro-operation: A micro-operation is a basic operation that a CPU (Central Processing Unit) can perform in one clock cycle. These operations are fundamental to executing … Read more
In an instruction format, there are 16 bits in an instruction word. Bit 0 to 11 convey the address of the memory location for memory related instructions. For non memory instructions these bits convey various register or I/O operations. Bits 12 to 14 show the various basic memory operations such asADD, AND, LDA etc. Bit 15 shows if the memory is accessed directly or indirectly. For such an instruction format draw block diagram of the control unit of a computer and briefly explain how an instruction will be decoded and executed, by this control unit.
1.Consider the instruction code format shown in image (a). It consists of a 3-bit operation code, a 12-bit address, and an indirect address mode bit … Read more
Assuming that all registers initially contain 0, what is the value of R1after the following instruction sequence is executed : MOV R1, # 6 MOV R2, # 5 ADD R3, R1, R1 SUB R1, R3, R2 MUL R3, R1, R1.
MOV R1, #6 {Directly move 6 to the register R1} MOV R2, #5 {Take another register in which directly move 5 into it} ADD R3, … Read more
Write the steps in fetching a word from memory.Differentiate between a branch instruction and call sub routine instruction.
Steps in fetching a word from memory are as follows :Step 1 : The CPU has to perform opcode fetch cycle and operand fetch cycle.Step … Read more
Define instruction cycle and divide instruction cycle into sub cycles with the help of diagram, explain the sequence in which sub cycles are executed.OR Explain the different cycles of an instruction execution.OR Explain all the phases of instruction cycle.
Instruction Cycle Overview: The instruction cycle is the process by which a computer retrieves a program instruction from memory, interprets it, and executes the necessary … Read more