The Design implementation of a hardware description language

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Date
1977-03
Authors
Ah Kun, Eng
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Abstract
This report describes the design and implementation of a hardware description language .• The language implemented can be used by the digital system designer to describe any digital circuit at gate level, and the language compiler will convert this description into an equivalent software model representing the system !he language uses circuit-oriented notation and accepts free-format input. the black-box or macro feature that is included in the language provides a very convenient way of generating repetive sub-system within a digital system 'the description language is aimed large and complex digital circuits, and hence the compiler will accept an;r circuit description up to a maximum of 32 thousand gates. As user's option, various tables of information can be printed, thus providing the user with a convenient means of c;1ecking and • debugging' the ayat .. that he specified. The language is written in PL/I and is implemented on an IBM 370 model 135 computer with 256K memory running under OS/VSl and VM/370. Minimum storage required by the compiler is 250JK. This is due to the large amount of storage reserved to hold the macro skeleton and the signal name number data structure. Since the operating system used support virtual storage, main storage requirement is not a critical problem. This ,.port contributes the first phase or a Digital System Stimulation Project
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Hardware description language
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