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If you study the history of Stalin, he was indeed responsible for the execution of millions.
Not necessarily the execution of them but certainly responsible for their deaths.
The execution unit execute the instruction while the bus interface unit do the fetching and shows the results as an output
The bus interface unit is the part of the processor that interfaces with the rest of the PC. Its name comes from the fact that it deals with moving information over the processor data bus, the primary conduit for the transfer of information to and from the CPU. The bus interface unit is responsible for responding to all signals that go to the processor, and generating all signals that go from the processor to other parts of the system.
about instruction execution time
In the 8086/8088, the execution unit is the part of the processor known as the CPU. It executes the instructions and generates the results. The bus interface unit, on the other hand, is the part of the processor that handles reading and writing to memory. The two are somewhat loosely coupled, with the bus interface unit attempting to always be ahead of the execution unit, i.e. using the cache, so that the execution unit's wait time is minimized and performance is maximized.
The Medical Unit is responsible for
20H
The executor is responsible for execution of the will.
the tower PC is a machiene that is in the system unit.
it has device (unit system) for process on the your PC.
when interrupt occurs, the program counter content will stores into stack, an PC will load interrupt address for next instruction execution. ofter completion ISR process PC will retrieves the stack values and execution will be continued.