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diff --git a/academic/ngspice/README b/academic/ngspice/README
new file mode 100644
index 0000000000000..d9b415f1cf284
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+++ b/academic/ngspice/README
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+Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is
+based on three open source software packages: Spice3f5, Cider1b1 and
+Xspice. Ngspice is part of gEDA project, a full GPL'd suite of
+Electronic Design Automation tools.
+
+Spice3 does not need any introduction, is the most popular circuit
+simulator. In over 30 years of its life Spice3 has become a de-facto
+standard for simulating circuits.
+
+Cider couples Spice3f5 circuit level simulator to DSIM device
+simulator to provide greater simulation accuracy of critical
+devices. DSIM devices are described in terms of their structures and
+materials.
+
+Xspice is an extension to Spice3C1 that provides code modeling support
+and simulation of digital components through an embedded event driven
+algorithm.
+
+Ngspice is, anyway, a little more than the simple sum of the packages
+above, as many people contributed to the project with their
+experience, their bug fixes and their improvements. If you are
+interested, browse the site and discover what ngspice offers and what
+needs. If you think you can help, join the development team.
+
+Ngspice is an ongoing project, growing everyday from users
+contributions, suggestions and reports. What we will be able to do
+depends mostly on user interests, contributions and feedback.
diff --git a/academic/ngspice/ngspice.SlackBuild b/academic/ngspice/ngspice.SlackBuild
new file mode 100644
index 0000000000000..ac2337ad499ae
--- /dev/null
+++ b/academic/ngspice/ngspice.SlackBuild
@@ -0,0 +1,100 @@
+#!/bin/sh
+
+# Slackware build script for ngspice
+# Written by B. Jogai <jogaib {at} comcast [dot] net>
+
+# Set initial variables:
+
+PRGNAM=ngspice
+VERSION=20
+ARCH=${ARCH:-i486}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+    SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+    LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+    SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+    LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+    SLKCFLAGS="-O2 -fPIC"
+    LIBDIRSUFFIX="64"
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/ng-spice-rework-$VERSION.tar.gz
+cd $PRGNAM-$VERSION
+chown -R root:root .
+chmod -R u+w,go+r-w,a-s .
+
+# Apply patch for missing xgraph support
+zcat $CWD/patches/ngspice-xgraph.patch.gz | patch -p1 
+
+# Fix the lib path to the code modules
+if [ "$ARCH" = "x86_64" ]; then
+    sed -i "s%/lib/%/lib${LIBDIRSUFFIX}/%g" src/spinit.in
+fi
+
+CFLAGS="$SLKCFLAGS" \
+    ./configure \
+    --prefix=/usr \
+    --bindir=/usr/bin \
+    --libdir=/usr/lib${LIBDIRSUFFIX} \
+    --mandir=/usr/man \
+    --infodir=/usr/info \
+    --disable-debug \
+    --with-readline=yes \
+    --enable-xgraph \
+    --enable-xspice \
+    --enable-cider \
+    --enable-dot-global \
+    --enable-intnoise \
+    --enable-numparam \
+    --enable-shared \
+    --disable-static \
+    --build=$ARCH-slackware-linux
+
+make
+make DESTDIR=$PKG install
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/examples
+
+cp -a ANALYSES AUTHORS BUGS COPYING ChangeLog DEVICES FAQ \
+    INSTALL NEWS README* doc/*.pdf doc/*.ps examples/ \
+    xgraph/examples/ \
+    $PKG/usr/doc/$PRGNAM-$VERSION/
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+find $PKG/usr/doc/$PRGNAM-$VERSION -type f -exec chmod 644 {} \;
+
+
+( cd $PKG
+  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | \
+    xargs strip --strip-unneeded 2> /dev/null || true
+  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | \
+    xargs strip --strip-unneeded 2> /dev/null || true
+)
+
+( cd $PKG/usr/man
+  find . -type f -exec gzip -9 {} \;
+  for i in $( find . -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+)
+
+rm -f $PKG/usr/info/dir
+gzip -9 $PKG/usr/info/*.info*
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/academic/ngspice/ngspice.info b/academic/ngspice/ngspice.info
new file mode 100644
index 0000000000000..d06d8f8f7ba2b
--- /dev/null
+++ b/academic/ngspice/ngspice.info
@@ -0,0 +1,10 @@
+PRGNAM="ngspice"
+VERSION="20"
+HOMEPAGE="http://ngspice.sourceforge.net/"
+DOWNLOAD="http://downloads.sourceforge.net/project/ngspice/ng-spice-rework/20/ng-spice-rework-20.tar.gz"
+DOWNLOAD_x86_64=""
+MD5SUM="81bc667a4190ef31081a6957d3c7f7b5"
+MD5SUM_x86_64=""
+MAINTAINER="B. Jogai"
+EMAIL="jogaib <at> comcast {dot} net"
+APPROVED="dsomero"
diff --git a/academic/ngspice/patches/ngspice-xgraph.patch.gz b/academic/ngspice/patches/ngspice-xgraph.patch.gz
new file mode 100644
index 0000000000000..589a4d8417571
--- /dev/null
+++ b/academic/ngspice/patches/ngspice-xgraph.patch.gz
diff --git a/academic/ngspice/slack-desc b/academic/ngspice/slack-desc
new file mode 100644
index 0000000000000..e643111733800
--- /dev/null
+++ b/academic/ngspice/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.  Line
+# up the first '|' above the ':' following the base package name, and the '|'
+# on the right side marks the last column you can put a character in.  You must
+# make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':'.
+
+        |-----handy-ruler------------------------------------------------------|
+ngspice: Ngspice (mixed-level/mixed-signal circuit simulator)
+ngspice: 
+ngspice: Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is
+ngspice: based on three open source software packages: Spice3f5, Cider1b1 and
+ngspice: Xspice. Ngspice is part of gEDA project, a full GPL'd suite of
+ngspice: Electronic Design Automation tools.
+ngspice: 
+ngspice:
+ngspice: 
+ngspice: 
+ngspice: