By B.S. Chalk
This ebook describes how a working laptop or computer works and explains how many of the elements are prepared and interconnected to supply a platform upon which courses will be accomplished. It takes an easy, step by step strategy appropriate for first 12 months undergraduates coming to the topic for the 1st time. the second one version of this e-book has been completely up-to-date to hide new advancements within the box and comprises new diagrams and end-of-chapter workouts. it is going to even be observed via a lecturer and pupil site with a purpose to include options to routines, extra workouts, PowerPoint slides and all of the resource code utilized in the ebook.
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Additional info for Computer Organisation and Architecture: An Introduction
From the truth table you will notice that when S ϭ 0, the output F is the same as the input X, and when S ϭ 1, the output F is the same as the input Y. In other words, the circuit acts as a logic switch, the output F being connected to X or Y depending upon whether S ϭ 1 or S ϭ 0. When designing logic circuits the result is often a very long and complex expression. In order to simplify these logic expressions, algebraic techniques of minimisation or Karnough maps may be used. These techniques are explained and demonstrated in Appendix 1.
After writing a program in assembly language, each instruction must be translated into machine code before the program can be loaded into memory and executed by the processor. This is carried out by a program called an assembler. 1. The ALU is a logic block which performs a limited number of arithmetic and logic operations, such as ‘ ϩ’, ‘Ϫ’, ‘AND’, etc. Our ALU operates upon data that has been stored in A or which has been buffered in the MBR. After performing such an operation, the content of A is overwritten with any results produced.
2 Processor–Memory interconnection A program consists of a series of instructions or actions to be carried out by the processor. These actions are performed on data. Instructions and data are stored in primary, or main, memory during program execution. 1, instructions and data occupy various memory locations, each location being identified by a unique address. 1 will cause a value to be read, or loaded, from memory location 4 into the accumulator in the CPU. A second value will then be read from memory location 5 and added to the first.
Computer Organisation and Architecture: An Introduction by B.S. Chalk