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Download Digital Computer Design. Logic, Circuitry, and Synthesis by Edward L. Braun PDF

By Edward L. Braun

Electronic machine layout, common sense, Circuitry, and Synthesis

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0. The iteration is repeated until the difference (Xi^i — Xi) becomes equal to or less than the precision required in the result. In its most elementary form, a flow diagram may be composed simply of a series of boxes interconnected by directed line segments. Each box contains either a word or symbolic statement of an operation that is to be performed. It may include such items as a statement of an equation to be solved, a condition to be met, a check to be performed to determine whether an operation is legitimate or numerically accurate, the source of input data, the disposition of output data, etc.

After a program has been debugged, it is ready for running. In the event that the same program is run over and over, with variations in certain parameters, say, with different boundary conditions, the process is referred to as production running. After the program has been run, there remains the task of evaluating the results. This is an extensive subject in itself, and will not be treated here. 5. Program Flow Diagrams It was stated in the preceding section that flow diagrams are useful in preparing a complete program for machine solution.

5, there is a description of special devices that may be incorporated into the control unit to facilitate address modification. The example following illustrates an application in which the storage space required for a series of operations may be reduced if an address modification procedure is utilized. 3. STORED PROGRAM DIGITAL COMPUTERS 29 A technique by which the addresses of certain designated instructions are modified as needed will be described with reference to a pirogram for transferring the contents of one group of storage locations to another group.

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