diff --git a/rtl837x_regs.h b/rtl837x_regs.h
new file mode 100644
index 0000000..ec51e14
--- /dev/null
+++ b/rtl837x_regs.h
@@ -0,0 +1,19 @@
+#ifndef _RTL837X_REGS_H_
+#define _RTL837X_REGS_H_
+
+#define RTL837X_REG_HW_CONF 0x6040
+// Bits 4 & 5: CLOCK DIVIDER from 125MHz for Timer
+
+#define RTL837X_REG_LED_MODE 0x6520
+// Defines the LED Mode for steering the Port LEDS and the System LED
+// BIT 17 set: LED solid on
+// Bytes 0/1 hold the LED mode, e.g. serial, RTL8231?
+#define RTL837X_REG_SMI_CTRL 0x6454
+#define RTL837X_REG_RESET 0x0024
+#define RTL837X_REG_SEC_COUNTER 0x06f4
+#define RTL837X_REG_SDS_MODES 0x7b20
+#define RTL837X_REG_LINKS 0x63f0
+
+// Blink rate is defined by setAsicRegBits(0x6520,0xe00000,rate);
+
+#endif