diff --git a/t/make_dev_matrix.pl b/t/make_dev_matrix.pl
new file mode 100755
index 00000000..d13adc9f
--- /dev/null
+++ b/t/make_dev_matrix.pl
@@ -0,0 +1,144 @@
+#!/usr/bin/perl -w
+
+# $Id$
+
+$DevMatrix = '../DeviceMatrix.txt';
+$DevHTML   = 'DeviceMatrix.html';
+$DevPNG    = 'DeviceMatrix.png';
+$Tab = 2;
+
+# Parse Data File
+$matrix = parse_data($DevMatrix);
+
+# Graph it for fun
+eval "use GraphViz::Data::Structure;";
+if ($@ or 1) {
+    print "GraphViz::Data::Structure not installed.\n";
+} else {
+    my $gvds = GraphViz::Data::Structure->new($matrix);
+    $gvds->graph()->as_png($DevPNG);
+}
+
+open (HTML, "> $DevHTML") or die "Can't open $DevHTML. $!\n";
+
+foreach my $vendor (sort sort_nocase keys %$matrix){
+    print "$vendor\n";
+
+    my $defaults = $matrix->{$vendor}->{defaults};
+    print_defaults($defaults,1);
+
+    my $families = $matrix->{$vendor}->{families};
+    foreach my $family (sort sort_nocase keys %$families ) {
+        print "  $family\n";
+
+        my $defaults = $families->{$family}->{defaults};
+        print_defaults($defaults,2);
+
+        my $models = $families->{$family}->{models};
+        foreach my $model (sort sort_nocase keys %$models ){
+            print "    $model\n";
+            my $defaults = $models->{$model}->{defaults};
+            print_defaults($defaults,3);
+        }
+    }
+}
+
+close (HTML) or die "Can't write $DevHTML. $!\n";
+
+# Data Structures
+
+# Matrix =
+#   ( vendor => { families  => { family => family_hash },
+#                  defaults => { cmd    => [values]    },
+#               }
+#   )
+
+# Family Hash
+#   ( models   => { model => model_hash },
+#     defaults => { cmd   => [values]   }
+#   )
+
+# Model Hash
+#   ( defaults => { cmd => [values] } )
+sub parse_data {
+    my $file = shift;
+    my $Matrix;
+
+    my @Lines;
+    open (DM, "< $file") or die "Can't open $file. $!\n";
+    {
+        @Lines = <DM>;
+    }
+    close (DM);
+
+    my ($device,$family,$vendor,$class);
+    foreach my $line (@Lines){
+        chomp($line);
+        # Comments
+        $line =~ s/#.*//;
+
+        # Blank Lines
+        next if $line =~ /^\s*$/;
+
+        # Trim whitespace
+        $line =~ s/^\s+//;
+        $line =~ s/\s+$//;
+
+        my ($cmd,$value);
+        if ($line =~ /^([a-z-_]+)\s*:\s*(.*)$/) {
+            $cmd = $1;  $value = $2; 
+        } else {
+            print "What do i do with this line : $line \n";
+            next;
+        }
+
+        # Set Class {vendor,family,device}
+        if ($cmd eq 'device-vendor'){
+            $vendor = $value;
+            $family = $model = undef;
+            $Matrix->{$vendor} = {} unless defined $Matrix->{$vendor};
+            $class = $Matrix->{$vendor};
+            next;
+        }
+
+        if ($cmd eq 'device-family'){
+            $family = $value;
+            $model = undef;
+            print "$family has no vendor.\n" unless defined $vendor;
+            $Matrix->{$vendor}->{families}->{$family} = {} 
+                unless defined $Matrix->{$vendor}->{families}->{$family};
+            $class = $Matrix->{$vendor}->{families}->{$family};
+            next;
+        }   
+
+        if ($cmd eq 'device') {
+            $model = $value;
+            print "$model has no family.\n" unless defined $family;
+            print "$model has no vendor.\n" unless defined $vendor;
+            $Matrix->{$vendor}->{families}->{$family}->{models}->{$model} = {} 
+                unless defined $Matrix->{$vendor}->{families}->{$family}->{models}->{$model};
+            $class = $Matrix->{$vendor}->{families}->{$family}->{models}->{$model};
+            next;
+        }
+
+        # Store attribute
+        push (@{$class->{defaults}->{$cmd}} , $value);
+    }
+
+    return $Matrix;
+}
+
+sub sort_nocase {
+    return lc($a) cmp lc($b);
+}
+
+sub print_defaults {
+    my $defaults = shift;
+    my $level    = shift;
+    foreach my $d (sort sort_nocase keys %$defaults) {
+        foreach my $val (sort sort_nocase @{$defaults->{$d}}) {
+            print ' ' x ($Tab*$level);
+            print "$d : $val\n";
+        }
+    }
+}