--- a/tools/view64.c	Sun Sep 24 22:02:54 2017 +0300
+++ b/tools/view64.c	Sun Sep 24 22:26:22 2017 +0300
@@ -16,6 +16,7 @@
 int    optVFlags = SDL_SWSURFACE | SDL_HWPALETTE;
 int    optScrWidth, optScrHeight;
 int    optForcedFormat = -1;
+BOOL   optProbeOnly = FALSE;
 
 
 static const DMOptArg optList[] =
@@ -25,6 +26,7 @@
     { 2,   0, "fs",         "Fullscreen", OPT_NONE },
     { 3, 'S', "scale",      "Scale image by factor (1-10)", OPT_ARGREQ },
     { 4, 'f', "format",     "Force input format (see list below)", OPT_ARGREQ },
+    { 5, 'p', "probe",      "Probe only (no display)", OPT_NONE },
 };
 
 const int optListN = sizeof(optList) / sizeof(optList[0]);
@@ -113,6 +115,10 @@
             }
             break;
 
+        case 5:
+            optProbeOnly = TRUE;
+            break;
+
         default:
             dmErrorMsg("Unknown option '%s'.\n", currArg);
             return FALSE;
@@ -149,7 +155,7 @@
 }
 
 
-void dmDumpC64Image(const DMC64Image *img)
+void dmDumpC64Image(const size_t size, const DMC64Image *img, const DMC64ImageFormat *fmt)
 {
     char typeStr[64];
 
@@ -161,10 +167,15 @@
         ((img->type & D64_FMT_CHAR) ? " CHAR" : "")
         );
 
-    dmPrint(0,
+    dmPrint(1,
+        "Format              : %s [%s]\n"
+        "Data size           : %" DM_PRIu_SIZE_T "\n"
         "Type                : %s\n"
         "Banks               : %d\n",
-        typeStr, img->nbanks);
+        fmt->name, fmt->fext,
+        size,
+        typeStr,
+        img->nbanks);
 
     if (img->type & D64_FMT_ILACE)
     {
@@ -175,12 +186,12 @@
             case D64_ILACE_RES: tmps = "resolution"; break;
             default: tmps = "ERROR"; break;
         }
-        dmPrint(0,
+        dmPrint(1,
             "Interlace type      : %s\n",
             tmps);
     }
 
-    dmPrint(0,
+    dmPrint(1,
         "Width x Height      : %d x %d\n"
         "CHwidth x CHheight  : %d x %d\n",
         img->width, img->height,
@@ -216,16 +227,16 @@
         goto error;
     }
 
+    dmPrint(1, "\n%s\n", optFilename);
     if ((ret = dmReadDataFile(NULL, optFilename, &dataBuf, &dataSize)) != DMERR_OK)
         goto error;
 
-    dmMsg(1, "Read %d bytes of input.\n", dataSize);
 
     // Probe for format
     if (optForcedFormat >= 0)
     {
         forced = &dmC64ImageFormats[optForcedFormat];
-        dmMsg(0,"Forced %s format image, type %d, %s\n",
+        dmMsg(0, "Forced %s format image, type %d, %s\n",
             forced->name, forced->type, forced->fext);
     }
     else
@@ -239,19 +250,16 @@
         goto error;
     }
 
-    if (forced == NULL && fmt != NULL)
-    {
-        dmPrint(0, "Probed %s format image, type %d, %s\n",
-            fmt->name, fmt->type, fmt->fext);
-    }
-
     if (fmt == NULL)
     {
         dmErrorMsg("Probing could not find any matching image format. Perhaps try forcing a format via -f.\n");
         goto error;
     }
 
-    dmDumpC64Image(cimage);
+    dmDumpC64Image(dataSize, cimage, fmt);
+
+    if (optProbeOnly)
+        goto error;
 
     // Initialize libSDL
     if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0)