diff --git a/doc/index.rst b/doc/index.rst
index 74608ff0..b05bc6a1 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -4,24 +4,16 @@
    contain the root `toctree` directive.
 
 SERV user manual
-================================
+================
 
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
 
-
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`modindex`
-* :ref:`search`
-
 Modules
 -------
 
-SERV is a bit-serial CPU which means that the internal datapath is one bit wide. :ref:`dataflow` show the internal dataflow. For each instructions, data is read from the register file or the immediate fields of the instruction word and the result of the operation is stored back into the register file. Reading and writing memory is handled through the memory interface module.
+SERV is a bit-serial CPU which means that the internal datapath is one bit wide. :ref:`dataflow` show the internal dataflow. For each instruction, data is read from the register file or the immediate fields of the instruction word and the result of the operation is stored back into the register file. Reading and writing memory is handled through the memory interface module.
 
 .. _dataflow:
 
diff --git a/doc/serv_immdec_int.png b/doc/serv_immdec_int.png
index cc462e20..1236b5b9 100644
Binary files a/doc/serv_immdec_int.png and b/doc/serv_immdec_int.png differ