diff --git a/src/ganimede/ganimede.vhd b/src/ganimede/ganimede.vhd
index b55b8fc..27cb49d 100644
--- a/src/ganimede/ganimede.vhd
+++ b/src/ganimede/ganimede.vhd
@@ -33,6 +33,7 @@ architecture rtl of ganimede_toplevel is
   signal socbridge_clk : std_logic;
   signal ganimede_to_ip_reset : std_logic;
 
+  constant buf_size :integer := 2*1024;
   --signal gan_socbridge_WE_in : std_logic;
   --signal gan_socbridge_WE_out : std_logic;
   --signal gan_socbridge_is_full_in : std_logic;
@@ -45,6 +46,9 @@ begin
   ganimede_to_ip_reset <= rst or ip_to_ganimede.socbridge.flush;
   --- DRIVER INSTANTIATION ---
   socbridge_driver_inst: entity gan_socbridge.socbridge_driver
+    generic map(
+      BUFFER_SIZE => buf_size
+    )
     port map(
       clk                            => clk,
       socbridge_clk                  => socbridge_clk,
@@ -81,7 +85,7 @@ begin
 
   fifo_buffer_to_ip_inst : entity gan_buffer.fifo_buffer
     generic map (
-      buffer_size => 2*1024
+      buffer_size => buf_size
       --tech => 60
     )
     port map(
@@ -93,12 +97,13 @@ begin
       valid_in => socbridge_driver_to_buffer.valid,
       valid_out => ganimede_to_ip.socbridge.valid,
       data_in => socbridge_driver_to_buffer.data,
-      data_out => ganimede_to_ip.socbridge.data
+      data_out => ganimede_to_ip.socbridge.data,
+      used_slots => ip_to_socbridge_driver.read_fifo.used_slots
     );
 
   fifo_buffer_from_ip_inst : entity gan_buffer.fifo_buffer
     generic map (
-      buffer_size => 2*1024
+      buffer_size => buf_size
 --      tech => 60
     )
     port map(
diff --git a/src/ganimede/io_type_pkg.vhd b/src/ganimede/io_type_pkg.vhd
index c9e000f..edc73cc 100644
--- a/src/ganimede/io_type_pkg.vhd
+++ b/src/ganimede/io_type_pkg.vhd
@@ -73,6 +73,7 @@ package io_types is
 
   type ip_to_socbridge_driver_t is record
     fifo: fifo_interface_t;
+    read_fifo: fifo_interface_t;
     flush: std_logic;
   end record ip_to_socbridge_driver_t;