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Initial commit at Tue Apr 25 08:41:48 EDT 2017 by tim on stravinsky
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Tim Edwards
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<HTML>
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<HEAD>
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<STYLE type="text/css">
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H1 {color: black }
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H2 {color: maroon }
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H3 {color: #007090 }
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A.head:link {color: #0060a0 }
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</STYLE>
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</HEAD>
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<TITLE>Magic-7.3 Command Reference</TITLE>
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<BODY BACKGROUND=graphics/blpaper.gif>
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<H1> <IMG SRC=graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
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<IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>
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<H2>tech</H2>
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<HR>
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Query properties of the current technology, or change the current
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technology.
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<HR>
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<H3>Usage:</H3>
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<BLOCKQUOTE>
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<B>tech</B> <I>option</I> <BR><BR>
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<BLOCKQUOTE>
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where <I>option</I> may be one of the following:
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<DL>
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<DT> <B>load</B> <I>filename</I> [<B>-noprompt</B>][<B>-nooverride</B>]
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<DD> Load a new technology from the file <I>filename</I>[<TT>.tech</TT>].
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<DT> <B>help</B>
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<DD> Display help information
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<DT> <B>name</B>
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<DD> Show current technology name
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<DT> <B>filename</B>
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<DD> Show current technology filename
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<DT> <B>version</B>
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<DD> Show current technology version and description strings
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<DT> <B>lambda</B>
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<DD> Show internal units per lambda
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<DT> <B>planes</B>
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<DD> Show defined planes
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<DT> <B>layers</B> [<I>layer</I>]
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<DD> Show defined layers
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<DT> <B>drc</B> <I>option</I>
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<DD> Query the DRC ruleset, where <I>option</I> is one of the
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following:
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<DL>
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<DT> <B>width</B> <I>layer</I>
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<DD> Return the minimum allowed width for the indicated
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layer type.
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<DT> <B>spacing</B> <I>layer1</I> [<I>layer2</I>]
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<DD> Return the minimum allowed spacing between
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<I>layer1</I> and <I>layer2</I>, if <I>layer2</I>
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is specified, or between <I>layer1</I> and itself,
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if not.
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</DL>
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</DL>
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</BLOCKQUOTE>
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</BLOCKQUOTE>
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<H3>Summary:</H3>
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<BLOCKQUOTE>
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The <B>tech</B> command queries aspects of the current
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technology, and can also be used to change the current
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technology. The <B>tech load</B> command completely
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replaces the technology. Normally a call to <B>tech load</B>
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generates a dialog window asking the user for confirmation,
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since the <B>tech load</B> command is potentially destructive
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and can cause loss of an existing layout. The <B>-noprompt</B>
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option forces a technology load without presenting a dialog.
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This is particularly useful to put a "<B>tech load</B> <I>name</I>
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<B>-noprompt</B>" command in a <TT>.magic</TT> startup
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file in the directory of a project, so that it is not necessary to
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specify the technology on the command line when invoking <B>magic</B>.
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However, occasionally one may want to run magic from the same
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project directory with a different technology.
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The <B>-nooverride</B> option prevents the <B>tech load</B> command
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from overriding a technology name entered on the UNIX
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command line when starting <B>magic</B>. <P>
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Technology file reloading is especially useful when
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developing a technology file, to immediately see the
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results of a change made to the file. The current
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technology can be reloaded with the simple Tcl command
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"<B>tech load [tech filename]</B>". <P>
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Note that there is a slightly different meaning between
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the command "<B>tech layers</B>" and "<B>tech layers "*"</B>".
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The former prints a formatted list of layers, including all
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aliases for each layer, to the console. The second returns
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a Tcl list of all layers, with only the primary name for
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each layer. <P>
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A few aspects of the technology must be queried from other
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commands. The CIF/GDS input and output styles are given
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by the <B>cif istyle</B> and <B>cif ostyle</B> commands, while
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the extraction style is given by the <B>extract style</B>
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command. <P>
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The <B>drc</B> option is intended for use by Tcl scripted
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procedures that wish to place layout while satisfying the
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DRC rules. The two accepted <I>rule</I> options are
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<B>spacing</B> and <B>width</B>.
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</BLOCKQUOTE>
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<H3>Implementation Notes:</H3>
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<BLOCKQUOTE>
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<B>tech</B> is implemented as a built-in command in <B>magic</B>.
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The command replaces the original <B>techinfo</B> command, which
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no longer exists.
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</BLOCKQUOTE>
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<H3>Bugs:</H3>
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<BLOCKQUOTE>
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<B>tech drc</B> may not return the correct value in all cases.
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</BLOCKQUOTE>
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<P><IMG SRC=graphics/line1.gif><P>
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<TABLE BORDER=0>
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<TR>
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<TD> <A HREF=commands.html>Return to command index</A>
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</TR>
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</TABLE>
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<P><I>Last updated:</I> October 16, 2004 at 1:59pm <P>
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</BODY>
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</HTML>
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