Add DLX simulator. Upstream provides no version number.

pkgs/misc/emulators/dlx/default.nix

···
+{ stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation {
+  name = "dlx-2012.07.08";
+
+  src = fetchurl {
+    url = "http://www.davidviner.com/zip/dlx/dlx.zip";
+    sha256 = "0q5hildq2xcig7yrqi26n7fqlanyssjirm7swy2a9icfxpppfpkn";
+  };
+
+  buildInputs = [ unzip ];
+
+  installPhase = ''
+    mkdir -p $out/include/dlx $out/share/dlx/{examples,doc} $out/bin
+    mv -v masm mon dasm $out/bin/
+    mv -v *.i auto.a $out/include/dlx/
+    mv -v *.a hp.m $out/share/dlx/examples/
+    mv -v README.txt MANUAL.TXT $out/share/dlx/doc/
+  '';
+
+  meta = {
+    homepage = "http://www.davidviner.com/dlx.php";
+    description = "DLX Simulator";
+    license = "GPL-2";
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   catdoc = callPackage ../tools/text/catdoc { };
 
+  dlx = callPackage ../misc/emulators/dlx { };
+
   eggdrop = callPackage ../tools/networking/eggdrop { };
 
   enca = callPackage ../tools/text/enca { };