--- a/tools/lib64fmts.c	Fri Jun 22 19:01:23 2018 +0300
+++ b/tools/lib64fmts.c	Fri Jun 22 19:02:49 2018 +0300
@@ -23,6 +23,24 @@
 }
 
 
+static int fmtProbeDoodle(const DMGrowBuf *buf, const DMC64ImageFormat *fmt)
+{
+    if (buf->len > 32 &&
+        (dmCompareAddr16(buf, 0, 0x1c00) || dmCompareAddr16(buf, 0, 0x5c00)))
+    {
+        // Packed variant
+        if (fmt->size == 0xfe && buf->len != fmt->size)
+            return DM_PROBE_SCORE_MAX;
+
+        // Unpacked variant
+        if (fmt->size != 0xfe && buf->len == fmt->size)
+            return DM_PROBE_SCORE_MAX;
+    }
+
+    return DM_PROBE_SCORE_FALSE;
+}
+
+
 static int fmtDecodeStaticRLEMarkerMode2(DMC64Image *img, const DMGrowBuf *buf, const DMC64ImageFormat *fmt)
 {
     int res;
@@ -1150,6 +1168,19 @@
             { DO_LAST      , 0              , 0     , 0,  0, NULL, NULL },
         }
     },
+
+    { // #10: Doodle
+        D64_FMT_HIRES,
+        C64_SCR_WIDTH   , C64_SCR_HEIGHT,
+        C64_SCR_CH_WIDTH, C64_SCR_CH_HEIGHT,
+        NULL, NULL,
+        NULL,
+        {
+            { DO_COPY       , DS_SCREEN_RAM  , 0x0000, 0,  0, NULL, NULL },
+            { DO_COPY       , DS_BITMAP_RAM  , 0x0400, 0,  0, NULL, NULL },
+            { DO_LAST       , 0              , 0     , 0,  0, NULL, NULL },
+        }
+    },
 };
 
 
@@ -1497,21 +1528,16 @@
 
     {
         "dd", "Doodle (unpacked)", 0x1c00, 9218, DM_FMT_RDWR,
-        NULL,
+        fmtProbeDoodle,
         NULL, NULL,
-        {
-            D64_FMT_HIRES,
-            C64_SCR_WIDTH   , C64_SCR_HEIGHT,
-            C64_SCR_CH_WIDTH, C64_SCR_CH_HEIGHT,
-            NULL, NULL,
-            NULL,
-            {
-                { DO_COPY       , DS_SCREEN_RAM  , 0x0000, 0,  0, NULL, NULL },
-                { DO_COPY       , DS_BITMAP_RAM  , 0x0400, 0,  0, NULL, NULL },
-                { DO_LAST       , 0              , 0     , 0,  0, NULL, NULL },
-            }
-        },
-        NULL
+        { }, &dmC64CommonFormats[10]
+    },
+
+    {
+        "jj", "Doodle (packed)", 0x5c00, 0xfe, DM_FMT_RDWR, // size is abused for RLE marker byte
+        fmtProbeDoodle,
+        fmtDecodeStaticRLEMarkerMode2, fmtEncodeStaticRLEMarkerMode2,
+        { }, &dmC64CommonFormats[10]
     },
 
     {