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What is the difference between three address instruction and two address instruction?
the differebce between three address instruction and two address instruction is three adresss instructoion two address instruction 1) here 3 oprarend fields are used 1) here 2 oprerand fields are used 2) the result is stored in 3rd operand 2) here the result is stored in 2nd oparend
Z4a-b 19c 26 solve the given equation by using Three Address instruction Two Address instruction 1 Address Instruction and 0 Address Instruction?
There is no equation first of all because the given expression conveys no clue regarding destination or source......................?
Which register in 8086 contains the address of the next instruction to be fetched?
program counter holds the address of the next instruction.
What is instruction format in computer architecture?
The connection between the hardware and software components of a computer creates the computer architecture. It is basically how the components are connected to form a complete system. Sir Frederick P. Brooks and Sir Lyle R. Johnson presented the idea of computer architecture in 1959. A set of operating codes, operands, an opcode, and an addressing mode make an instruction. The instruction format is the standard instruction format that is directly used by the CPU. The instruction format is just the sequence of bits (0,1). The group of these bits is called a field. Each field of the system provides specific information for a particular task to the CPU about the instruction's operation and the instruction's data. The most fundamental difficulty in format design is instruction length. The longer the command will, take longer the time to fetch it. The types of Fields are discussed below: Operation Field: It specifies the operations that are performed by the instructions like, ADD, SUB, etc. It can be any value or number on which the task has been performed. Operation field is mandatory for every instructor Address Field: It specifies the address of the operand. It refers to the address where the operand is stored. On the basis of multiple address fields, the instruction is categorised as follows: Zero address instruction: The operand positions are implicitly represented in zero address instructions. The stack-organized computer system supports these commands. One address instruction: This instruction manipulates data with the help of an implicit accumulator. Accumulator is a register that performs a logical process for the CPU. It uses one address field. Two address instructions: This address instruction is mostly used. This address command format has three operand fields. In the two address sections, registers or memory addresses can be used. Three address instructions: A three-address command must contain three operand components in its format. These three fields could be registers or memory locations. The instruction pipeline in computer architecture The instruction pipeline in computer architecture shows the system's instruction flow. It has 4 major segments, which are discussed below. Segment 1: The instruction fetch part can be performed using first in, first out (FIFO) buffers. Segment 2: The second section decodes the memory-fetched command before the effective location is computed in a different arithmetic circuit. Segment 3: The input is fetched from memory. Segment 4: The execution of the instructions is performed. Some of the features of instruction are : Addressing model: This is the first part of the instruction format. Data over the instruction format can be represented as an addressing format, and data is stored in the computer's memory or in the CPU's register OPCODE(operation code): This is the second part of the instruction format, and the opcode instructs the processor to perform the desired operation. Operand: Depending upon the processor instruction format, it contains zero to three operands, and this part specifies the data or points to the address of the data.
If the instruction contain four addresses what might be the purpose of each address?
1st address for operand. 2nd address for another operand. 3rd address for store the result. 4th address for next instruction.
What is the function of the program counter register?
The function of the program counter register is to hold the address of the instruction that is being executed and (later) to hold the address of the instruction that will be executed next.
When interrupt occurs where is the address following the current instruction stored?
When an interrupt occurs, the address following the current instruction is stored on the stack.
The first instruction in the ROM BIOS startup program is always assigned to?
Memory address FFFF0h is the memory address always assigned to the first instruction in the ROM BIOS
What is the difference between instruction registers and instruction pointer?
instruction register is used to store the next instruction to be executed. instruction pointer is used to store the address of the next instruction to be executed.
On traditional IBM mainframe what PSW is a special register that holds the address of the nest instruction to be executed?
Yes, the "Current PSW" contains machine state and next instruction address. It is a 64 bit register, and bits 33-63 (AMODE=31) or bits 40-63 (AMODE=24) contain the address of the next instruction to be executed. Certain "restartable" instructions, while in flight, will maintain the current instruction address until the sequence is complete, and certain exceptions, "early exceptions", will contain the current instruction address but, in general, the PSW (33-63) contains the address of the next instruction to execute.
What is the function of program counter?
program counter is a register that has the address of next instruction that has to be executed after currently executing instruction. it is used for proper execution of functions of computer by providing address of next instruction to microprocessor.
What is an address bus in a microprocessor?
The address bus is a section of the bus that emits the address of the desired instruction or operand.
