diff --git a/top/x400/doc/X4XX_FPGA_left.htm b/top/x400/doc/X4XX_FPGA_left.htm
index d643a73..050be6b 100644
--- a/top/x400/doc/X4XX_FPGA_left.htm
+++ b/top/x400/doc/X4XX_FPGA_left.htm
@@ -159,7 +159,7 @@
       <div class="sh" id="div_AXI_HPM0_REGMAP|COMMON">        
         <p><span class="register" id="a_AXI_HPM0_REGMAP|RPU" onclick="a('AXI_HPM0_REGMAP|RPU');">RPU</span></p>        
         <p><span class="register" id="a_AXI_HPM0_REGMAP|JTAG_ENGINE" onclick="a('AXI_HPM0_REGMAP|JTAG_ENGINE');">JTAG_ENGINE</span></p>        
-        <p><span class="register" id="a_AXI_HPM0_REGMAP|WR" onclick="a('AXI_HPM0_REGMAP|WR');">WR</span></p>        
+        <p><span class="register" id="a_AXI_HPM0_REGMAP|RESERVED" onclick="a('AXI_HPM0_REGMAP|RESERVED');">RESERVED</span></p>        
         <p><span class="register" id="a_AXI_HPM0_REGMAP|MPM_ENDPOINT" onclick="a('AXI_HPM0_REGMAP|MPM_ENDPOINT');">MPM_ENDPOINT</span></p>        
         <p><span class="register" id="a_AXI_HPM0_REGMAP|CORE_REGS" onclick="a('AXI_HPM0_REGMAP|CORE_REGS');">CORE_REGS</span></p>        
         <p><span class="register" id="a_AXI_HPM0_REGMAP|INT_ETH_DMA" onclick="a('AXI_HPM0_REGMAP|INT_ETH_DMA');">INT_ETH_DMA</span></p>        
diff --git a/top/x400/doc/X4XX_FPGA_right.htm b/top/x400/doc/X4XX_FPGA_right.htm
index 4a4cacf..88c73f6 100644
--- a/top/x400/doc/X4XX_FPGA_right.htm
+++ b/top/x400/doc/X4XX_FPGA_right.htm
@@ -984,12 +984,12 @@ Total Offset =</td></tr>
 </div>
 
             <div class="register">
-              <a name="AXI_HPM0_REGMAP|WR"></a>
+              <a name="AXI_HPM0_REGMAP|RESERVED"></a>
             
-<h3 class="register">Offset 0x100003F000: WR Window (R|W)</h3>
+<h3 class="register">Offset 0x100003F000: RESERVED Window (R|W)</h3>
 
-                 <a class="sh_addrs" href="javascript:sa('AXI_HPM0_REGMAP|WR_in')">(<span id="show_AXI_HPM0_REGMAP|WR_in">show</span> extended info)</a>
-                 <div class="sh_addrs" id="div_AXI_HPM0_REGMAP|WR_in">
+                 <a class="sh_addrs" href="javascript:sa('AXI_HPM0_REGMAP|RESERVED_in')">(<span id="show_AXI_HPM0_REGMAP|RESERVED_in">show</span> extended info)</a>
+                 <div class="sh_addrs" id="div_AXI_HPM0_REGMAP|RESERVED_in">
                  
                 <table class="extended_info">
                 
@@ -1006,7 +1006,7 @@ Total Offset =</td></tr>
 <td class="outercell" rowspan="1">
 
 <table border="0" cellspacing="0" cellpadding="0">
-  <tr><td class="offset_info" align="right">WR</td></tr>
+  <tr><td class="offset_info" align="right">RESERVED</td></tr>
   <tr><td class="offset_info" align="right">&nbsp;&nbsp;offset=0x100003F000</td></tr>
   <tr><td class="offset_info" align="right">&nbsp;&nbsp;size=0x1000 (4 Kbytes)</td></tr>
 </table>
@@ -1039,7 +1039,7 @@ Total Offset =</td></tr>
 <div class="info">
 
 <div class="xmlpmd">
-<p>NOT IMPLEMENTED YET! Register space reserved for White Rabbit.</p></div>
+<p>Register space reserved for future use.</p></div>
 
 </div>
 
diff --git a/top/x400/ip/x4xx_ps_rfdc_bd/regmap/common_regs.v b/top/x400/ip/x4xx_ps_rfdc_bd/regmap/common_regs.v
index 4541543..00c7187 100644
--- a/top/x400/ip/x4xx_ps_rfdc_bd/regmap/common_regs.v
+++ b/top/x400/ip/x4xx_ps_rfdc_bd/regmap/common_regs.v
@@ -83,8 +83,8 @@
 //    <window name="JTAG_ENGINE"  offset="0x1000000000" size="0x1000">
 //      <info>Register space for the JTAG engine for MB CPLD programming.</info>
 //    </window>
-//    <window name="WR"           offset="0x100003F000" size="0x1000">
-//      <info>NOT IMPLEMENTED YET! Register space reserved for White Rabbit.</info>
+//    <window name="RESERVED"     offset="0x100003F000" size="0x1000">
+//      <info>Register space reserved for future use.</info>
 //    </window>
 //    <window name="MPM_ENDPOINT" offset="0x1000080000" size="0x20000"
 //                                targetregmap="PL_CPLD_REGMAP">