No. Pipeline processors are faster because they do not have to wait to fetch the next instruction, because the next instruction was "pre-fetched" already.
pipelining
Intel 8086 has two separate units for fetching the instruction and executing the instruction. Thus while executing one instruction other instruction can be fetched. Thus it avoids the waiting time for the Execution Unit to receive other instruction. Bus Interface Unit (instruction fetching unit) stores the fetched instructions in a 6 level deep FIFO. This improves overall speed of the processor.
Fetching
Pipelining a processor provides substantial improvements to processing speeds by making it a straight through device. That means all data goes straight through and there is nothing to slow it down.
it's instruction pointer register it's in cpu and it holds the instruction which the cpu fetching it from memory
The instruction cycle is the basic operation cycle in a computer. This is what will take in data, process it and execute as required.
Instruction pre-fetching is very important phenomena in 8086 microprocessor. There is a 16-bit register set located in the BIU (bus Interface Unit) known as QUEUE.While EU (Execution Unit) is working on the instructions i.e decoding and executing them, queue fetches the next sixinstruction byte of the running program. It is to be noted that, unlike stack (which is last in first out), queue is first in first out. Instruction which is fetched first is retrieved first.This is much faster than sending out the address and waiting for memory to send back the instruction byte or bytes.Limitation of QUEUE:This pre-fetching of instruction speeds up processing but sometimes during 1JMP and CALL statements, queue has to be dumped and reloaded again starting from the next address.Fetching the instruction while the current instruction executes is called pipelining.1. Like in c++ programming, when a function is called the control is transferred to the function and its instruction
An instruction cycle is the rudimentary operation cycle of any computer. It involves the CPU fetching a program from memory and executing it fully.
The fetch-execute cycle of a typical microprocessor involves fetching an instruction from memory, determining what actions the instruction requires it to do, and performing those actions. It is also simply called the Instruction Cycle.
SP is the stack pointer and can be used in the stack operations. It cannot be used for fetching the instruction
The bus interface unit provides the func- tions related to instruction fetching and queuing, op- erand fetch and store, and address relocation. This unit also provides the basic bus control. The overlap of instruction pre-fetching provided by this unit serves to increase processor performance through improved bus bandwidth utilization. Up to 6 bytes of the instruction stream can be queued while waiting for decoding and execution.
A: ALL computer have an I/O and have interrupt signals these signal are there to service whatever is requesting a service. A printer request for instance or a USB device the processor will wait until the service is completed unless it is released. lesson to learn the I/O is the pace of speed not the speed of the CPU which usually loaf waiting for interrupts to be finished. Fast I/O buss means a fast computer.