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What is the need of Instruction PointerIP in 8086 microprocessor?
The Instruction Pointer (IP) in an 8086 microprocessor contains the address of the next instruction to be executed. The processor uses IP to request memory data from the Bus Interface Unit, and then increments it by the size of the instruction.
What is EI in microprocessor 8085?
In the 8085 microprocessor, EI stands for "Enable Interrupt." It is an instruction used to enable the interrupt system, allowing the microprocessor to recognize and respond to external interrupt requests. When the EI instruction is executed, the microprocessor sets the interrupt enable flip-flop, permitting it to accept interrupts after the current instruction is completed. This is crucial for handling asynchronous events and multitasking in embedded systems.
How many bus cycles are required for an unconditional or a conditional jump instruction in 8086 microprocessor to be executed?
when conditional jump instruction is executed it has 10 m/c cycles bt when nt executed it has 7 m/c cycles....while unconditional jump instruction has 10 m/c cycles...
What is an instruction clock in a microprocessor?
An instruction clock in a microprocessor refers to the clock signal that synchronizes the execution of instructions within the processor. It determines the timing for when instructions are fetched, decoded, and executed, effectively controlling the overall speed at which the processor operates. The frequency of the instruction clock influences the number of instructions that can be processed per second, impacting the performance of the microprocessor.
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 the use of NOP instruction in 8085?
The NOP (No Operation) instruction takes time but does nothing to the data or the status of the microprocessor. When executed in a loop, it can take substantial time, from microseconds, to milliseconds, to seconds.
What is subroutine in 8085?
in 8085 microprocessor a subroutine is a separate program written aside from main program ,this program is basically the program which requires to be executed several times in the main program. the microprocessor can call subroutine any time using CALL instruction . after the subroutine is executed the subbroutine hands over the program to main program using RET instruction.
Which register contains address of next instruction fetch in 8086 mp?
In the 8086 microprocessor, the Instruction Pointer (IP) register contains the address of the next instruction to be fetched and executed. It works in conjunction with the Segment Registers (such as CS - Code Segment) to form the complete address of the instruction in memory. The IP is automatically updated as instructions are executed, ensuring that the CPU always knows where to fetch the next instruction from.
How can you calculate the physical memory of the next instruction executed by the microprocessor?
To calculate the physical memory address of the next instruction executed by a microprocessor, you typically use the program counter (PC), which holds the address of the next instruction to be fetched. The PC is incremented after each fetch, usually by the size of the instruction that was executed. In systems with paging or segmentation, you may also need to consider the current values of the segment registers or page tables to translate virtual addresses to physical addresses correctly. Thus, the physical address can be derived from the PC value, along with any necessary address translation mechanisms.
What happens after the microprocessor completes an instruction?
It fetches the next instruction.
Which group of instruction do not affected the flag in microprocessor?
branch instruction
When the microprocessor completes an instruction what happens?
it goes to queue for next instruction
