diff --git a/boards/uniboard1/designs/unb1_test/src/vhdl/ddr_stream.vhd b/boards/uniboard1/designs/unb1_test/src/vhdl/ddr_stream.vhd
index fb5fe3ad72d01ed9217988faab7ab297d141121a..94c979b48fc3aea2d84c6375f1d678742f912dfa 100644
--- a/boards/uniboard1/designs/unb1_test/src/vhdl/ddr_stream.vhd
+++ b/boards/uniboard1/designs/unb1_test/src/vhdl/ddr_stream.vhd
@@ -45,8 +45,8 @@ ENTITY ddr_stream IS
     g_nof_streams               : NATURAL;
     g_data_w                    : NATURAL;
 
-    g_bg_block_size             : NATURAL := 900;
-    g_bg_gapsize                : NATURAL := 100;
+    g_bg_block_size             : NATURAL := 1024;
+    g_bg_gapsize                : NATURAL := 0;
     g_bg_blocks_per_sync        : NATURAL := 200000;
 
     g_tech_ddr                  : t_c_tech_ddr := c_tech_ddr3_4g_800m_master;
@@ -55,40 +55,44 @@ ENTITY ddr_stream IS
   );
   PORT (
     -- System
-    mm_rst                         : IN  STD_LOGIC;
-    mm_clk                         : IN  STD_LOGIC;
+    mm_rst                      : IN  STD_LOGIC;
+    mm_clk                      : IN  STD_LOGIC;
 
-    dp_rst                         : IN  STD_LOGIC;
-    dp_clk                         : IN  STD_LOGIC;
+    dp_rst                      : IN  STD_LOGIC;
+    dp_clk                      : IN  STD_LOGIC;
 
     -- blockgen mm
-    reg_diag_bg_mosi               : IN  t_mem_mosi := c_mem_mosi_rst;  -- BG control register (one for all streams)
-    reg_diag_bg_miso               : OUT t_mem_miso;
-    ram_diag_bg_mosi               : IN  t_mem_mosi := c_mem_mosi_rst;  -- BG buffer RAM (one per stream)
-    ram_diag_bg_miso               : OUT t_mem_miso;
+    reg_diag_bg_mosi            : IN  t_mem_mosi := c_mem_mosi_rst;  -- BG control register (one for all streams)
+    reg_diag_bg_miso            : OUT t_mem_miso;
+    ram_diag_bg_mosi            : IN  t_mem_mosi := c_mem_mosi_rst;  -- BG buffer RAM (one per stream)
+    ram_diag_bg_miso            : OUT t_mem_miso;
+    reg_diag_tx_seq_mosi        : IN  t_mem_mosi := c_mem_mosi_rst;
+    reg_diag_tx_seq_miso        : OUT t_mem_miso;
 
     -- bsn
-    reg_bsn_monitor_mosi           : IN  t_mem_mosi;
-    reg_bsn_monitor_miso           : OUT t_mem_miso;
+    reg_bsn_monitor_mosi        : IN  t_mem_mosi;
+    reg_bsn_monitor_miso        : OUT t_mem_miso;
 
     -- databuffer
-    reg_diag_data_buf_mosi         : IN  t_mem_mosi := c_mem_mosi_rst;
-    reg_diag_data_buf_miso         : OUT t_mem_miso;
-    ram_diag_data_buf_mosi         : IN  t_mem_mosi := c_mem_mosi_rst;
-    ram_diag_data_buf_miso         : OUT t_mem_miso;
+    reg_diag_data_buf_mosi      : IN  t_mem_mosi := c_mem_mosi_rst;
+    reg_diag_data_buf_miso      : OUT t_mem_miso;
+    ram_diag_data_buf_mosi      : IN  t_mem_mosi := c_mem_mosi_rst;
+    ram_diag_data_buf_miso      : OUT t_mem_miso;
+    reg_diag_rx_seq_mosi        : IN  t_mem_mosi := c_mem_mosi_rst;
+    reg_diag_rx_seq_miso        : OUT t_mem_miso;
 
-    -- IO DDR register map        
-    reg_io_ddr_mosi                : IN  t_mem_mosi;
-    reg_io_ddr_miso                : OUT t_mem_miso;
+    -- IO DDR register map      
+    reg_io_ddr_mosi             : IN  t_mem_mosi;
+    reg_io_ddr_miso             : OUT t_mem_miso;
 
-    -- Reorder transpose          
-    ram_ss_ss_transp_mosi          : IN  t_mem_mosi;
-    ram_ss_ss_transp_miso          : OUT t_mem_miso;
+    -- Reorder transpose        
+    ram_ss_ss_transp_mosi       : IN  t_mem_mosi;
+    ram_ss_ss_transp_miso       : OUT t_mem_miso;
 
     -- SO-DIMM Memory Bank I
-    MB_I_IN                        : IN    t_tech_ddr3_phy_in;
-    MB_I_IO                        : INOUT t_tech_ddr3_phy_io;
-    MB_I_OU                        : OUT   t_tech_ddr3_phy_ou
+    MB_I_IN                     : IN    t_tech_ddr3_phy_in;
+    MB_I_IO                     : INOUT t_tech_ddr3_phy_io;
+    MB_I_OU                     : OUT   t_tech_ddr3_phy_ou
   );
 END ddr_stream;
 
@@ -149,8 +153,9 @@ BEGIN
     g_buf_dat_w          => g_data_w,
     g_buf_addr_w         => ceil_log2(TO_UINT(c_bg_ctrl.samples_per_packet)),
     g_file_index_arr     => array_init(0, g_nof_streams),
-    g_file_name_prefix   => "../../counter_data_" & NATURAL'IMAGE(g_data_w),
-    g_diag_block_gen_rst => c_bg_ctrl
+    g_file_name_prefix   => "hex/counter_data_" & NATURAL'IMAGE(g_data_w),
+    g_diag_block_gen_rst => c_bg_ctrl,
+    g_use_tx_seq         => TRUE
   )
   PORT MAP (
     mm_rst           => mm_rst,
@@ -166,7 +171,9 @@ BEGIN
     reg_bg_ctrl_mosi => reg_diag_bg_mosi,
     reg_bg_ctrl_miso => reg_diag_bg_miso,
     ram_bg_data_mosi => ram_diag_bg_mosi,
-    ram_bg_data_miso => ram_diag_bg_miso
+    ram_bg_data_miso => ram_diag_bg_miso,
+    reg_tx_seq_mosi  => reg_diag_tx_seq_mosi,
+    reg_tx_seq_miso  => reg_diag_tx_seq_miso
   );
 
 
@@ -199,7 +206,8 @@ BEGIN
     g_nof_streams  => g_nof_streams,
     g_data_w       => 32, --g_data_w, --FIXME
     g_buf_nof_data => 1024,
-    g_buf_use_sync => FALSE -- sync by reading last address of data buffer
+    g_buf_use_sync => FALSE, -- sync by reading last address of data buffer
+    g_use_rx_seq   => TRUE
   )
   PORT MAP (
     mm_rst            => mm_rst,
@@ -211,6 +219,8 @@ BEGIN
     ram_data_buf_miso => ram_diag_data_buf_miso,
     reg_data_buf_mosi => reg_diag_data_buf_mosi,
     reg_data_buf_miso => reg_diag_data_buf_miso,
+    reg_rx_seq_mosi   => reg_diag_rx_seq_mosi,
+    reg_rx_seq_miso   => reg_diag_rx_seq_miso,
 
     in_sync           => diag_data_buf_snk_in_arr(0).sync,
     in_sosi_arr       => diag_data_buf_snk_in_arr
diff --git a/boards/uniboard1/designs/unb1_test/src/vhdl/udp_stream.vhd b/boards/uniboard1/designs/unb1_test/src/vhdl/udp_stream.vhd
index 2599ffe18131ddd8d75bae516c838caa42ef9725..8fa43e8152a31f0286a55360d09ab6aff35bda33 100644
--- a/boards/uniboard1/designs/unb1_test/src/vhdl/udp_stream.vhd
+++ b/boards/uniboard1/designs/unb1_test/src/vhdl/udp_stream.vhd
@@ -63,6 +63,8 @@ ENTITY udp_stream IS
     reg_diag_bg_miso               : OUT t_mem_miso;
     ram_diag_bg_mosi               : IN  t_mem_mosi := c_mem_mosi_rst;  -- BG buffer RAM (one per stream)
     ram_diag_bg_miso               : OUT t_mem_miso;
+    reg_diag_tx_seq_mosi           : IN  t_mem_mosi := c_mem_mosi_rst;
+    reg_diag_tx_seq_miso           : OUT t_mem_miso;
 
     -- dp_offload_tx
     reg_dp_offload_tx_mosi         : IN  t_mem_mosi := c_mem_mosi_rst;
@@ -90,7 +92,9 @@ ENTITY udp_stream IS
     reg_diag_data_buf_mosi         : IN  t_mem_mosi := c_mem_mosi_rst;
     reg_diag_data_buf_miso         : OUT t_mem_miso;
     ram_diag_data_buf_mosi         : IN  t_mem_mosi := c_mem_mosi_rst;
-    ram_diag_data_buf_miso         : OUT t_mem_miso
+    ram_diag_data_buf_miso         : OUT t_mem_miso;
+    reg_diag_rx_seq_mosi           : IN  t_mem_mosi := c_mem_mosi_rst;
+    reg_diag_rx_seq_miso           : OUT t_mem_miso
   );
 END udp_stream;
 
@@ -157,8 +161,9 @@ BEGIN
     g_buf_dat_w          => g_data_w,
     g_buf_addr_w         => ceil_log2(TO_UINT(c_bg_ctrl.samples_per_packet)),
     g_file_index_arr     => array_init(0, g_nof_streams),
-    g_file_name_prefix   => "../../counter_data_" & NATURAL'IMAGE(g_data_w),
-    g_diag_block_gen_rst => c_bg_ctrl
+    g_file_name_prefix   => "hex/counter_data_" & NATURAL'IMAGE(g_data_w),
+    g_diag_block_gen_rst => c_bg_ctrl,
+    g_use_tx_seq         => TRUE
   )
   PORT MAP (
     mm_rst           => mm_rst,
@@ -173,7 +178,9 @@ BEGIN
     reg_bg_ctrl_mosi => reg_diag_bg_mosi,
     reg_bg_ctrl_miso => reg_diag_bg_miso,
     ram_bg_data_mosi => ram_diag_bg_mosi,
-    ram_bg_data_miso => ram_diag_bg_miso
+    ram_bg_data_miso => ram_diag_bg_miso,
+    reg_tx_seq_mosi  => reg_diag_tx_seq_mosi,
+    reg_tx_seq_miso  => reg_diag_tx_seq_miso
   );
 
   gen_dp_fifo_sc : FOR i IN 0 TO g_nof_streams-1 GENERATE
@@ -321,7 +328,8 @@ BEGIN
     g_nof_streams  => g_nof_streams,
     g_data_w       => 32, --g_data_w, --FIXME
     g_buf_nof_data => 1024,
-    g_buf_use_sync => FALSE -- sync by reading last address of data buffer
+    g_buf_use_sync => FALSE, -- sync by reading last address of data buffer
+    g_use_rx_seq   => TRUE
   )
   PORT MAP (
     mm_rst            => mm_rst,
@@ -333,6 +341,8 @@ BEGIN
     ram_data_buf_miso => ram_diag_data_buf_miso,
     reg_data_buf_mosi => reg_diag_data_buf_mosi,
     reg_data_buf_miso => reg_diag_data_buf_miso,
+    reg_rx_seq_mosi   => reg_diag_rx_seq_mosi,
+    reg_rx_seq_miso   => reg_diag_rx_seq_miso,
 
     in_sync           => diag_data_buf_snk_in_arr(0).sync,
     in_sosi_arr       => diag_data_buf_snk_in_arr