diff --git a/readme.md b/readme.md
index 5d255d7..b3ac6ff 100644
--- a/readme.md
+++ b/readme.md
@@ -156,7 +156,24 @@
 |0xFC		    | 31:0	 |  reg63	    |  reserved    |    |     R/W       |
 |  |  | | | ||
 
-## CMAC_1 Ethernet Interface Registers Base Address: 0x8101_0000
+## CMAC_1 Ethernet Core Registers Base Address: 0x8101_0000
+
+| Address<br>Offset		|  Bit   |  Register Name      |  Bit(s) Name   |Description          	        |  Read/Write |
+| :---  | :----: | :-------: 	|	:--------  |	:--------                       | :----:        |
+|0x00		    | 31:1<br>0	 |  reg0	    |  gt_reset_reg | Reserved<br>1 = Reset, self-clearing  |     R/W       |
+|  |  | | | ||
+|0x04		    | 31:0	 |  reg1	    |  reset_reg |   |     R/W       |
+|  |  | | | ||
+|0x0C		    | 31:1<br>0	 |  reg2	    |  configuration_tx_reg1 | Reserved1<br>0 = Disable, 1 = Enable  |     R/W       |
+|  |  | | | ||
+|0x14		    | 31:1<br>0	 |  reg4	    |  configuration_rx_reg1 | Reserved1<br>0 = Disable, 1 = Enable   |     R/W       |
+|  |  | | | ||
+|0x24		    | 31:16<br>15:8<br>7:0	 |  reg5	    | core_version_reg   | Reserved<br>Major Version<br>Minor Version  |     R/W       |
+|  |  | | | ||
+|0x90		    | 31:1<br>0	 |  reg6	    |  gt_loopback | Reserved<br> 0 = Normal,<br>Near End PMA Loopback  |     R/W       |
+|  |  | | | ||
+
+## CMAC_1 Ethernet Interface Registers Base Address: 0x8100_0000
 
 | Address<br>Offset		|  Bit   |  Register Name      |  Bit(s) Name   |Description          	        |  Read/Write |
 | :---  | :----: | :-------: 	|	:--------  |	:--------                       | :----:        |
@@ -193,7 +210,23 @@
 |0x58		    | 31:0	 |  reg22	    |  rx_fifo_overflow_cnt | ?????  |     R       |
 |  |  | | | ||
 
-## CMAC_4 Ethernet Interface Registers Base Address: 0x8201_0000
+## CMAC_4 Ethernet Core Registers Base Address: 0x8201_0000
+
+| Address<br>Offset		|  Bit   |  Register Name      |  Bit(s) Name   |Description          	        |  Read/Write |
+| :---  | :----: | :-------: 	|	:--------  |	:--------                       | :----:        |
+|0x00		    | 31:1<br>0	 |  reg0	    |  gt_reset_reg | Reserved<br>1 = Reset, self-clearing  |     R/W       |
+|  |  | | | ||
+|0x04		    | 31:0	 |  reg1	    |  reset_reg |   |     R/W       |
+|  |  | | | ||
+|0x0C		    | 31:1<br>0	 |  reg2	    |  configuration_tx_reg1 | Reserved1<br>0 = Disable, 1 = Enable  |     R/W       |
+|  |  | | | ||
+|0x14		    | 31:1<br>0	 |  reg4	    |  configuration_rx_reg1 | Reserved1<br>0 = Disable, 1 = Enable   |     R/W       |
+|  |  | | | ||
+|0x24		    | 31:16<br>15:8<br>7:0	 |  reg5	    | core_version_reg   | Reserved<br>Major Version<br>Minor Version  |     R/W       |
+|  |  | | | ||
+|0x90		    | 31:1<br>0	 |  reg6	    |  gt_loopback | Reserved<br> 0 = Normal,<br>Near End PMA Loopback  |     R/W       |
+|  |  | | | ||
+## CMAC_4 Ethernet Interface Registers Base Address: 0x8200_0000
 
 | Address<br>Offset		|  Bit   |  Register Name      |  Bit(s) Name   |Description          	        |  Read/Write |
 | :---  | :----: | :-------: 	|	:--------  |	:--------                       | :----:        |