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
Description
Keywords
Hardware description language