diff --git a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
index 7a4ea6db5..508e25cee 100644
--- a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
+++ b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
@@ -1230,6 +1230,11 @@ public class TestPrograms {
       compileAndCompare("c64dtv-blittermin");
    }
 
+   @Test
+   public void testC64DtvBlitterBox() throws IOException, URISyntaxException {
+      compileAndCompare("c64dtv-blitter-box");
+   }
+
    @Test
    public void testC64Dtv8bppChunkyStretch() throws IOException, URISyntaxException {
       compileAndCompare("c64dtv-8bppchunkystretch");
diff --git a/src/test/kc/c64dtv-blitter-box.kc b/src/test/kc/c64dtv-blitter-box.kc
new file mode 100644
index 000000000..df9ab614f
--- /dev/null
+++ b/src/test/kc/c64dtv-blitter-box.kc
@@ -0,0 +1,57 @@
+// Fill a box on the screen using the blitter
+
+import "c64dtv.kc"
+
+const byte* SCREEN = $400;
+const byte[] SRCA = "camelot rules!";
+const byte[] SRCB = { $80 };
+
+void main() {
+
+    *DTV_FEATURE = DTV_FEATURE_ENABLE;
+
+    // Instruct blitter not to continue previous blit
+    *DTV_BLITTER_CONTROL2 = DTV_BLIT_CLEAR_IRQ;
+
+    *DTV_BLITTER_SRCA_LO = <SRCA;
+    *DTV_BLITTER_SRCA_MI = >SRCA;
+    *DTV_BLITTER_SRCA_HI = 0;
+    *DTV_BLITTER_SRCA_MOD_LO = 0;
+    *DTV_BLITTER_SRCA_MOD_HI = 0;
+    *DTV_BLITTER_SRCA_LIN_LO = <$100uw;
+    *DTV_BLITTER_SRCA_LIN_HI = >$100uw;
+    *DTV_BLITTER_SRCA_STEP = 01; // Step 0.0
+
+    *DTV_BLITTER_SRCB_LO = <SRCB;
+    *DTV_BLITTER_SRCB_MI = >SRCB;
+    *DTV_BLITTER_SRCB_HI = 0;
+    *DTV_BLITTER_SRCB_MOD_LO = 0;
+    *DTV_BLITTER_SRCB_MOD_HI = 0;
+    *DTV_BLITTER_SRCB_LIN_LO = <$100uw;
+    *DTV_BLITTER_SRCB_LIN_HI = >$100uw;
+    *DTV_BLITTER_SRCB_STEP = $00; // Step 0.0
+
+    *DTV_BLITTER_DEST_LO = <SCREEN+40+5;
+    *DTV_BLITTER_DEST_MI = >SCREEN+40+5;
+    *DTV_BLITTER_DEST_HI = 0;
+    *DTV_BLITTER_DEST_MOD_LO = <21uw;
+    *DTV_BLITTER_DEST_MOD_HI = >21uw;
+    *DTV_BLITTER_DEST_LIN_LO = <19uw;
+    *DTV_BLITTER_DEST_LIN_HI = >19uw;
+    *DTV_BLITTER_DEST_STEP = $10; // Step 1.0
+
+    *DTV_BLITTER_LEN_LO = <20*10uw;
+    *DTV_BLITTER_LEN_HI = >20*10uw;
+
+    *DTV_BLITTER_ALU = DTV_BLIT_ADD;
+    *DTV_BLITTER_TRANSPARANCY = DTV_BLIT_TRANSPARANCY_NONE;
+
+    // Start blitter
+    *DTV_BLITTER_CONTROL = DTV_BLIT_FORCE_START | DTV_BLIT_SRCA_FWD | DTV_BLIT_SRCB_FWD| DTV_BLIT_DEST_FWD;
+    // Instruct blitter to continue at DEST and restart SRC A/B
+    *DTV_BLITTER_CONTROL2 = DTV_BLIT_DEST_CONT;
+
+     // wait til blitter is ready
+     do {} while((*DTV_BLITTER_CONTROL2 & DTV_BLIT_STATUS_BUSY)!=0);
+
+}
\ No newline at end of file
diff --git a/src/test/kc/c64dtv-blittermin.kc b/src/test/kc/c64dtv-blittermin.kc
index ee0002776..ffc43fa90 100644
--- a/src/test/kc/c64dtv-blittermin.kc
+++ b/src/test/kc/c64dtv-blittermin.kc
@@ -17,8 +17,8 @@ void main() {
     *DTV_BLITTER_SRCA_HI = 0;
     *DTV_BLITTER_SRCA_MOD_LO = 0;
     *DTV_BLITTER_SRCA_MOD_HI = 0;
-    *DTV_BLITTER_SRCA_LIN_LO = <$100;
-    *DTV_BLITTER_SRCA_LIN_HI = >$100;
+    *DTV_BLITTER_SRCA_LIN_LO = <$100uw;
+    *DTV_BLITTER_SRCA_LIN_HI = >$100uw;
     *DTV_BLITTER_SRCA_STEP = $10; // Step 1.0
 
     *DTV_BLITTER_SRCB_LO = <SRCB;
@@ -26,8 +26,8 @@ void main() {
     *DTV_BLITTER_SRCB_HI = 0;
     *DTV_BLITTER_SRCB_MOD_LO = 0;
     *DTV_BLITTER_SRCB_MOD_HI = 0;
-    *DTV_BLITTER_SRCB_LIN_LO = <$100;
-    *DTV_BLITTER_SRCB_LIN_HI = >$100;
+    *DTV_BLITTER_SRCB_LIN_LO = <$100uw;
+    *DTV_BLITTER_SRCB_LIN_HI = >$100uw;
     *DTV_BLITTER_SRCB_STEP = $00; // Step 0.0
 
     *DTV_BLITTER_DEST_LO = <SCREEN;
@@ -35,8 +35,8 @@ void main() {
     *DTV_BLITTER_DEST_HI = 0;
     *DTV_BLITTER_DEST_MOD_LO = 0;
     *DTV_BLITTER_DEST_MOD_HI = 0;
-    *DTV_BLITTER_DEST_LIN_LO = <$100;
-    *DTV_BLITTER_DEST_LIN_HI = >$100;
+    *DTV_BLITTER_DEST_LIN_LO = <$100uw;
+    *DTV_BLITTER_DEST_LIN_HI = >$100uw;
     *DTV_BLITTER_DEST_STEP = $10; // Step 1.0
 
     *DTV_BLITTER_LEN_LO = SRCA_LEN;