diff --git a/applications/lwsrv/DBfile b/applications/lwsrv/DBfile
index a32993e..1286b59 100644
--- a/applications/lwsrv/DBfile
+++ b/applications/lwsrv/DBfile
@@ -550,3 +550,26 @@ LaserWriter = (
 		AvantGarde-DemiOblique,
 	);
 );
+
+"LaserWriter 4/600 PS" = (
+	include "LaserWriter Plus";
+	FeatureQuery *LanguageLevel '"2"';
+	FeatureQuery *PSVersion '"(2014.107) 1"';
+	FeatureQuery *FreeVM '"1607044"';
+	FeatureQuery *TTRasterizer Type42;
+	FeatureQuery *Product '"(LaserWriter 4/600 PS)"';
+	Query Product '"(LaserWriter 4/600 PS)"';
+	Query ADORamSize '"6291456"';
+	FeatureQuery *?Resolution 600dpi;
+);
+
+"Personal LaserWriter 320" = (
+	include "LaserWriter Plus";
+	FeatureQuery *LanguageLevel '"2"';
+	FeatureQuery *PSVersion '"(2013.112) 1"';
+	FeatureQuery *FreeVM '"2371856"';
+	FeatureQuery *TTRasterizer Type42;
+	FeatureQuery *Product '"(LaserWriter Personal 320)"';
+	Query Product '"(LaserWriter Personal 320)"';
+	Query ADORamSize '"8388608"';
+);
\ No newline at end of file
diff --git a/applications/lwsrv/README LW4-600_LW320 b/applications/lwsrv/README LW4-600_LW320
new file mode 100644
index 0000000..c470f1e
--- /dev/null
+++ b/applications/lwsrv/README LW4-600_LW320	
@@ -0,0 +1,10 @@
+The values for LaserWriter 4/600 PS in 'DBFile' are for the
+memory upgrade to 6 MB. Without upgrade your printer has 2 MB
+memory. Then the correct value for FreeVM is 481544 and for
+ADORamSize 2097152.
+
+The values for Personal LaserWriter 320 in 'DBFile' are for the
+memory upgrade to 8 MB. With upgrade to 4 MB the correct value
+for FreeVM is 2191632 and for ADORamSize 4194304. Without upgrade
+your printer has 2 MB memory. Then the correct value for FreeVM
+is 425600 and for ADORamSize 2097152.
\ No newline at end of file