<P> Fetching the instruction opcodes from program memory well in advance is known as prefetching and it is served by using prefetch input queue ( PIQ ). The pre-fetched instructions are stored in data structure - namely a queue . The fetching of opcodes well in advance , prior to their need for execution increases the overall efficiency of the processor boosting its speed . The processor no longer has to wait for the memory access operations for the subsequent instruction opcode to complete . This architecture was prominently used in the Intel 8086 microprocessor . </P>
<P> Fetching the instruction opcodes from program memory well in advance is known as prefetching and it is served by using prefetch input queue ( PIQ ). The pre-fetched instructions are stored in data structure - namely a queue . The fetching of opcodes well in advance , prior to their need for execution increases the overall efficiency of the processor boosting its speed . The processor no longer has to wait for the memory access operations for the subsequent instruction opcode to complete . This architecture was prominently used in the Intel 8086 microprocessor . </P>
the bus interface unit prefetches instructions from memory and store them in
the bus interface unit prefetches instructions from memory and store them in
a queue
a queue