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Location information in a memory
Location information in a memory
use without knowledge of system of commands is absolutely impossible, after all the Assembler language represents symbolical record of digital codes of computer language, codes of commands of the processor. Certainly, for development of the software there are every possible software. To use them it is usually possible and without knowledge of system of commands of the processor. More often programming languages of high level, such as Pascal and SI are applied. However the knowledge of system of commands and the Assembler language allows to increase several times efficiency of some most important parts of the software of any micropro-cessor system - from the microcontroller to the personal computer. For this reason in this chapter we will consider the main types of commands which are available for the majority of processors, and features of their application. Each command, chosen (read) of memory the processor, defines algorithm of behavior of the processor on the next some steps. The code of command speaks about what operation should be executed to the processor and with what operands (that is codes of data) where to take initial information for command execution and where to place result (if it is necessary). The code of command can borrow from one to several bytes, and the processor learns about that, how many command byte he should read, from the first byte read by it or a word. In the processor the code of command is deciphered and will be transformed to a set of the micro operations which are carried out by separate knots of the processor. But to the developer of microprocessor systems this knowledge isn't too important, to it the result of performance of this or that command is important only. 2.3.1. Addressing of operands The most part of commands of the processor works with codes of data (operands). One commands demand entrance operands (one or two), others give out target operands (one operand is more often). Entrance operands are called still as operands sources, and days off are called as operands receivers. All these codes of operands (entrance and target) should settle down somewhere. They can be in internal registers of the processor (the most convenient and fast option). They can settle down in system memory (the most widespread option). At last, they can be in input-output devices (the most exceptional case).
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Programming languages and programming systems
Programming languages and programming systems
programmers productivity began to apply languages programming, not consoling with absolute languages. On COMPUTER of the third generation an absolute language practically is not used for programming of tasks, the role of internal language of COMPUTER was saved only after him. Several hundred different languages are presently counted programming which are classified on different signs. Most general is classification on the degree of dependence of language from COMPUTER. On this sign languages are divided by two large groups: • Computer-dependent languages, • Computer-independent languages. Computer-dependent languages, in turn, divide by machine and machine-oriented. An absolute language is a programming language, directly perceived by a computer. Every command of absolute language is interpreted by an apparatus, executing the indicated functions. Commands of absolute language in principle are enough primitive. The only corresponding association of these commands in the programs in absolute language enables to describe serious enough algorithms. The sets of commands of absolute language of modern computers include some very effective possibilities frequently. It is said that an absolute language is computer-dependent: the program, written in absolute language of computer of one type, as a rule, can not be executed on the computer of other type, if its absolute language is not identical to the absolute language of the first computer (or is not expansion in relation to this language). By another sign machine, or by a vehicle, there is character of commands dependence: in the commands of
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Стратегия развития отрасли ИТ в России
Стратегия развития отрасли ИТ в России
Развитие кадрового потенциала и образования в отрасли информационных технологий Стратегия развития отрасли ИТ в России. Вклад Уральского федерального университета Ноябрь 2013 год. Студенческая конференция, посвященная исследовательскому проекту «Развитие ИТ-отрасли России» Современные образовательные программы бакалавриата и магистратуры ИТ направлений, разработанные с участием специалистов ведущих мировых и российских ИТ компаний. Реализация концепции непрерывного образования: школьники – студенты - аспиранты – специалисты высшей квалификации. Внедрение в учебный процесс сертифицированных курсов мировых вендоров IT. Развитие кадрового потенциала и образования в отрасли информационных технологий Стратегия развития отрасли ИТ в России. Вклад Уральского федерального университета
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