diff --git a/README.md b/README.md
index c765a41a..b9de6e62 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ Models support:
 
 All models support only single texture for all meshes and only up to 255 frames.
 
-Texture supported
+Texture support:
 
 | Format | Original Game  | Comments |
 | ------ | -------------- | -------- |
@@ -61,16 +61,31 @@ Texture supported
 | jpg    | retexturing    | 24 bit   |
 | bmp    | Daikatana      | 24 bit   |
 
+Maps support:
+
+| Format | Version | Game                                       |
+| ------ | ------- | ------------------------------------------ |
+| IBSP   | 39      | Quake 2 / Anachronox / Kingpin / Heretic 2 |
+| IBSP   | 41      | Daikatana                                  |
+| QBSP   | 39      | Quake 2 ReRelease                          |
+| BSPX   | 39      | Quake 2 ReRelease (Extension to IBSP)      |
+
+Note:
+ * SiN Gold has IBSP/41 format but has different size of lump and is
+   unsupported.
+ * Not Quake 2 maps are limmited mostly view only, and could have issues
+   with tranparency or some animations flags and properties.
+
 Goals (finished):
   * BSPX DECOUPLEDLM light map support (base1),
   * QBSP map format support (mguhub),
   * Use ffmpeg for load any video,
   * RoQ and Theora cinematic videos support.
   * Cinematic videos support in smk, mpeg, ogv format,
-  * Daikatana/Heretic map partial format support,
+  * Daikatana/Heretic 2 map partial format support,
   * md5 improve load speed,
   * support Anachronox .dat format,
-  * Add debug progress loading code for maps.
+  * add debug progress loading code for maps.
 
 
 Goals (none of it finished):
diff --git a/src/common/collision.c b/src/common/collision.c
index c1d42432..8ebbc98b 100644
--- a/src/common/collision.c
+++ b/src/common/collision.c
@@ -1962,6 +1962,14 @@ CM_LoadCachedMap(const char *name, model_t *mod)
 				__func__, name, header.version, BSPVERSION);
 	}
 
+	Com_DPrintf("%s: Map %s ident %c%c%c%c version %d\n",
+				__func__, name,
+				(header.ident >> 0) & 0xFF,
+				(header.ident >> 8) & 0xFF,
+				(header.ident >> 16) & 0xFF,
+				(header.ident >> 24) & 0xFF,
+				header.version);
+
 	cmod_base = (byte *)buf;
 
 	/* load into heap */