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Gerrit Blaauw: Zitate auf Englisch

“The design of a digital system starts with the specification of the architecture of the system and continues with its implementation and its subsequent realisation… the purpose of architecture is to provide a function. Once that function is established, the purpose of implementation is to give a proper cost-performance and the purpose of realisation is to build and maintain the appropriate logical organisation.”

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Gerrit Blaauw

Quelle: Specification of Digital Systems (1978), p. 29

“There always is an architecture, whether it is defined in advance - as with modern computers - or found out after the fact - as with many older computers. For architecture is determined by behavior, not by words. Therefore, the term architecture, which rightly implies the notion of the arch, or prime structure, should not be understood as the vague overall idea. Rather, the product of the computer architecture, the principle of operations manual, should contain all detail which the user can know, and sooner or later is bound to know.”

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Gerrit Blaauw

Quelle: Computer architecture (1972), p. 155

“The result of the implementation, the logical design, is traditionally shown as a series of block diagrams. These blocks represent in effect a series of statements, Actually, a direct presentation of these statements is more suitable and, although less familiar, more easily understood. The Harvard Mark IV was to large degree designed and described by such statements, as has been the case with several subsequent developments.”

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Gerrit Blaauw

Quelle: Computer architecture (1972), p. 154

“In computer design three levels can be distinguished: architecture, implementation and realisation; for the ﬁrst of them, the following working deﬁnition is given: The architecture of a system can be defined as the functional appearance of the system to the user, its phenomenology.”

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Gerrit Blaauw

Although the term architecture was introduced only ten years ago in computer technology (Buchholz), the concept of architecture is as old as the use of mechanism by man. When a child is taught to look at a clock, it is taught the architecture of the clock. It is told to observe the position of the short and the long hand and to relate these to the hours and the minutes. Once it can distinguish the architecture from the visual appearance, it can tell time as easily from a wrist watch as from the clock on the church tower.
The inner structure of a system is not considered by the architecture: we do not need to know what makes the clock tick, to know what time it is. This inner structure, considered from a logical point of view, will be called the implementation, and its physical embodiment the realisation.
Quelle: Computer architecture (1972), p. 154