diff --git a/rtl/ethernet-udp/src/eth/mac/mac_top.v b/rtl/ethernet-udp/src/eth/mac/mac_top.v
index 64e0444..ca70805 100644
--- a/rtl/ethernet-udp/src/eth/mac/mac_top.v
+++ b/rtl/ethernet-udp/src/eth/mac/mac_top.v
@@ -1,8 +1,6 @@
-//////////////////////////////////////////////////////////////////////////////////////
-//Module Name : mac_top
-//Description :
-//
-//////////////////////////////////////////////////////////////////////////////////////
+// Top module for base ethernet operations
+// inheireted from Alinx
+
 `timescale 1 ns/1 ns
 module mac_top
        (
@@ -37,6 +35,7 @@ module mac_top
          input  [10:0]        udp_rec_ram_read_addr,
          output [15:0]        udp_rec_data_length,
          output               udp_rec_data_valid,
+         output [11:0]        udp_ram_data_count,
          
          output               arp_found,
          output               mac_not_exist
@@ -81,6 +80,7 @@ mac_tx_top mac_tx0
             .arp_rec_source_ip_addr      (arp_rec_source_ip_addr ),
             .arp_rec_source_mac_addr     (arp_rec_source_mac_addr ),
             .arp_request_req             (arp_request_req ),
+            .udp_ram_data_count          (udp_ram_data_count ),
             
             
             .ram_wr_data                 (ram_wr_data) ,
diff --git a/rtl/ethernet-udp/src/eth/mac/tx/mac_tx_top.v b/rtl/ethernet-udp/src/eth/mac/tx/mac_tx_top.v
index 0a230a5..f8de95a 100644
--- a/rtl/ethernet-udp/src/eth/mac/tx/mac_tx_top.v
+++ b/rtl/ethernet-udp/src/eth/mac/tx/mac_tx_top.v
@@ -31,8 +31,9 @@ module mac_tx_top
          (* MARK_DEBUG="true" *)input  [15:0]        udp_send_data_length,
          (* MARK_DEBUG="true" *)output               udp_tx_end,
          (* MARK_DEBUG="true" *)output               almost_full,
+         (* MARK_DEBUG="true" *)output [11:0]        udp_ram_data_count,
          
-         output               upper_data_req,
+         (* MARK_DEBUG="true" *)output               upper_data_req,
          input                icmp_tx_ready,
          input  [7:0]         icmp_tx_data,
          input                icmp_tx_end,
@@ -251,7 +252,8 @@ udp_tx udp0
          .udp_tx_ready                   (udp_tx_ready               ),
          .udp_tx_data                    (udp_tx_data                ),
          .udp_tx_end                     (udp_tx_end                 ),
-         .almost_full                    (almost_full                )        
+         .almost_full                    (almost_full                ),
+         .udp_ram_data_count             (udp_ram_data_count         )       
        ) ;
        
 endmodule
diff --git a/rtl/ethernet-udp/src/eth/mac/tx/udp_tx.v b/rtl/ethernet-udp/src/eth/mac/tx/udp_tx.v
index a6afa00..c111b11 100644
--- a/rtl/ethernet-udp/src/eth/mac/tx/udp_tx.v
+++ b/rtl/ethernet-udp/src/eth/mac/tx/udp_tx.v
@@ -27,13 +27,14 @@ module udp_tx
           output reg               udp_tx_ready,
           output reg [7:0]         udp_tx_data,
           output reg               udp_tx_end,
-          output                   almost_full
+          output                   almost_full,
+          output     [11:0]        udp_ram_data_count
          
        ) ;
        
 
 reg                       ram_rd_en ;
-wire [3:0]                usedw     ;
+(* MARK_DEBUG="true" *) wire [3:0]                usedw     ;
 reg  [3:0]                fifo_count ;
 
 reg  [7:0]                ram_rdata_d0  ;
@@ -62,7 +63,7 @@ parameter UDP_SEND          = 6'b010000 ;
 parameter UDP_END           = 6'b100000 ;
 
 
-reg [5:0]    state  ;
+(* MARK_DEBUG="true" *) reg [5:0]    state  ;
 reg [5:0]    next_state ;
 
 
@@ -222,7 +223,7 @@ udp_tx_data_fifo tx_data_fifo
     .full         (               ),                // output wire full
     .almost_full  (almost_full    ),  // output wire almost_full
     .empty        (               ),              // output wire empty
-    .data_count   (               )    // output wire [11 : 0] data_count
+    .data_count   (udp_ram_data_count )    // output wire [11 : 0] data_count
   );
 
 
@@ -356,7 +357,7 @@ udp_tx_data_fifo tx_data_fifo
   localparam GEN_CHECKSUM_END  = 6'b010000 ;
   localparam CHECKSUM_WAIT     = 6'b100000 ;
   
-  reg [5:0]    ck_state  ;
+  (* MARK_DEBUG="true" *) reg [5:0]    ck_state  ;
   reg [5:0]    ck_next_state ;
   
   always @(posedge clk or negedge rst_n)