diff --git a/tornado/fw/txt/t b/tornado/fw/txt/t
index ec5a418..2f2c2e6 100755
--- a/tornado/fw/txt/t
+++ b/tornado/fw/txt/t
@@ -1,2 +1,9 @@
 #!/bin/sh
-./txt2xbm TEST | ./stretch 6 | ./xbm2gp "$@" | ./plot
+T="TEST"
+F=6
+if [ "$1" = -g ]; then
+	shift
+	./txt2xbm "$T" | ./stretch $F  | ./xbm2gp "$@" | ./plot
+else
+	./txt2xbm "$T" | ./stretch $F  | ./xbm2tornado
+fi
diff --git a/tornado/fw/txt/xbm2tornado b/tornado/fw/txt/xbm2tornado
new file mode 100755
index 0000000..dc21ffe
--- /dev/null
+++ b/tornado/fw/txt/xbm2tornado
@@ -0,0 +1,37 @@
+#!/usr/bin/perl
+
+sub pick
+{
+	local ($x, $y) = @_;
+
+	my $i = $x+$y*$X;
+	return ((hex $p[$i >> 3]) >> ($i & 7)) & 1;
+}
+
+
+while (<>) {
+	chop;
+	if (/#define\s+\S+_width\s+(\d+)/) {
+		$X = $1;
+		next;
+	}
+	if (/#define\s+\S+_height\s+(\d+)/) {
+		$Y = $1;
+		next;
+	}
+	next unless /\s*0x/;
+	s/^\s*//;
+	s/(,|};)$//;
+	push(@p, split /,/);
+}
+
+for ($x = 0; $x != $X; $x++) {
+	for ($y = 0; $y != $Y; $y += 8) {
+		$v = 0;
+		for ($i = 0; $i != 8; $i++) {
+			$v |= 1 << $i if &pick($x, $y+$i);
+		}	
+		print sprintf("0x%02x, ", $v);
+	}
+}
+print "\n";