This command will print out each command description that contains the subject string. If you're interested in information about a particular subject, you can type
If you type a space, the next screenful of data will be output, and if you type q the rest of the output will be skipped. After each screenful of help information, :help stops and prints ``-More-'`. This facility is useful if you've forgotten the name or exact syntax of a command. The :help command will print out one line for each Magic command, giving the command's syntax and an extremely brief description of the command. However, the man page may not make much sense until after you've read the tutorial.Ī third way of getting help is available on-line through Magic itself. Once you have a general idea how a command works, the man page is probably easier to consult than the tutorial. The man page gives concise and complete descriptions of all the Magic commands. The ultimate authority on how Magic works is the reference manual, which is a standard Unix man page. Each one is designed to introduce a set of facilities, but it doesn't necessarily cover every possibility. The tutorials are not necessarily complete.
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Table I: The Magic tutorials, maintenance manuals, and technology manuals Magic Tutorial #1 You needn't read all the tutorials at once each tutorial lists the other tutorials that you should read first. The tutorials are designed to be read while you are running Magic, so that you can try out the new commands as they are explained. Each one of the technology manuals describes the features peculiar to a particular technology, such as layer names and design rules. Finally, there is a set of technology manuals.
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These describe things like how to create new technologies.
There is also a set of manuals intended for system maintainers. Each tutorial introduces a particular set of facilities in Magic. If you are trying to learn about the system, you should start off with the Magic tutorials, of which this is the first. How to Get Help and Report Problems There are several ways you can get help about Magic. We think that the density sacrifice is compensated for by reduced design time.Ģ. Circuit designers tell us that our conservative design rules cost 5-10% in density. For example, Magic permits only Manhattan designs (those whose edges are vertical or horizontal). However, they result in slightly less dense circuits than you could get with more complex rules and structures. The simplifications make it easier for you to design circuits and permit Magic to provide powerful assistance that would not be possible otherwise. This means that it uses simplified design rules and circuit structures. Magic is based on the Mead-Conway style of design. Lastly, Magic has routing tools that you can use to make the global interconnections in your circuits. Magic also has a plow operation that you can use to stretch or compact cells. Magic also knows about connectivity and transistors, and contains a built-in hierarchical circuit extractor. For example, Magic has built-in knowledge of layout rules as you are editing, it continuously checks for rule violations. The most important difference is that Magic is more than just a color painting tool: it understands quite a bit about the nature of circuits and uses this information to provide you with additional operations. Magic is different from other layout editors you may have used.
With Magic, you use a color graphics display and a mouse or graphics tablet to design basic cells and to combine them hierarchically into large structures. What is Magic? Magic is an interactive system for creating and modifying VLSI circuit layouts. This tutorial corresponds to Magic version 6.ġ. Magic Tutorial #1: Getting Started John OusterhoutĪctive version by Computer Science DivisionĮlectrical Engineering and Computer Sciences
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