diff --git a/src/NetHack_3.7/src/mkmap.c b/src/NetHack_3.7/src/mkmap.c
index 18e4be5..a467ac5 100644
--- a/src/NetHack_3.7/src/mkmap.c
+++ b/src/NetHack_3.7/src/mkmap.c
@@ -27,9 +27,9 @@ init_map(schar bg_typ)
 
     for (i = 1; i < COLNO; i++)
         for (j = 0; j < ROWNO; j++) {
-            levl[i][j].roomno = NO_ROOM;
-            levl[i][j].typ = bg_typ;
-            levl[i][j].lit = FALSE;
+            levl[i][j].roomno = NO_ROOM; // Set room number to NO_ROOM
+            levl[i][j].typ = bg_typ; // Set cell type to the specified background type
+            levl[i][j].lit = FALSE; // Set the cell as not lit
         }
 }
 
@@ -250,9 +250,9 @@ join_map_cleanup(void)
 
     for (x = 1; x < COLNO; x++)
         for (y = 0; y < ROWNO; y++)
-            levl[x][y].roomno = NO_ROOM;
-    gn.nroom = gn.nsubroom = 0;
-    gr.rooms[gn.nroom].hx = gs.subrooms[gn.nsubroom].hx = -1;
+            levl[x][y].roomno = NO_ROOM; // Set room number to NO_ROOM
+    gn.nroom = gn.nsubroom = 0; // Reset the number of rooms and subrooms
+    gr.rooms[gn.nroom].hx = gs.subrooms[gn.nsubroom].hx = -1; // Reset room boundaries
 }
 
 static void