--- a/tools/lib64util.c	Sat Jun 15 07:54:39 2019 +0300
+++ b/tools/lib64util.c	Sat Jun 15 07:55:26 2019 +0300
@@ -114,6 +114,43 @@
 }
 
 
+void argShowC64Formats(FILE *fp, const BOOL rw)
+{
+    fprintf(fp,
+        "Available C64 bitmap formats (-f <frmt>):\n"
+        " frmt %s| Type            | Description\n"
+        "------%s+-----------------+-------------------------------------\n",
+        rw ? "| RW " : "",
+        rw ? "+----" : ""
+        );
+
+    for (int i = 0; i < ndmC64ImageFormats; i++)
+    {
+        const DMC64ImageFormat *fmt = dmC64ImageFormatsSorted[i];
+        char buf[64];
+
+        fprintf(fp, "%-6s",
+            fmt->fext);
+
+        if (rw)
+        {
+            fprintf(fp, "| %c%c ",
+                (fmt->flags & DM_FMT_RD) ? 'R' : ' ',
+                (fmt->flags & DM_FMT_WR) ? 'W' : ' '
+                );
+        }
+
+        fprintf(fp,
+            "| %-15s | %s%s\n",
+            dmC64GetImageTypeString(buf, sizeof(buf), fmt->format->type, FALSE),
+            fmt->name,
+            fmt->flags & DM_FMT_BROKEN ? " [BROKEN]" : "");
+    }
+
+    fprintf(fp, "%d formats supported.\n", ndmC64ImageFormats);
+}
+
+
 BOOL argHandleC64PaletteOption(char *optArg, DMC64Palette **ppal, char **palFile)
 {
     if (strcasecmp(optArg, "help") == 0 ||