1. The hardware technology used in the first generation of computers is _electronic tube_ .
2. There are many instructions in the computer system, and the process of completing an instruction by different instruction hosts is not the same . The following is the execution process of an instruction .
In the above block diagram, it is the execution process of instruction_fetch instruction_ .
3. The operation speed of the computer is related to many factors, such as the main frequency of the machine, what kind of operation to perform, etc. MIPS is a commonly used unit of measurement to measure the speed of a computer. Suppose, machine A can execute 2 million instructions per second, denoted as 2MIPS , and machine B can execute 5 million instructions per second, denoted as 5MIPS . On both machines, when running the same program, the time fetch instruction _cannot be determined_ on both machines .
Solution: The speed at which the machine executes the program also depends on the number of instructions the program has on the machine. The number of instructions in the object code of the same program translated into a machine with a large MIPS number may be more than the number of instructions in the object code of a machine with a small MIPS number. The CPU speed is related to the main frequency of the CPU, but it is not that the higher the main frequency, the faster the speed. During the execution of a user program, other programs may be inserted to run, so the observed execution time of the user program is usually longer than its real CPU execution time.
4. The following terms are used to evaluate the performance of the CPU
5. The main indicators of computer hardware include _ operation speed, storage capacity, bus width, machine word length _.
6. The smallest unit in which a computer stores data is _bit_.