diff --git a/ROM.h b/ROM.h
new file mode 100644
index 0000000..551e512
--- /dev/null
+++ b/ROM.h
@@ -0,0 +1,30 @@
+#ifndef ROM_H
+	#define ROM_H
+
+	#define CHECKSUMMED_SIZE 0x0B
+
+	#define PRODUCT_RNODE 0x03
+	#define MODEL_A4 0xA4
+	#define MODEL_A9 0xA9
+
+	#define ADDR_PRODUCT   0x00
+	#define ADDR_MODEL     0x01
+	#define ADDR_HW_REV    0x02
+	#define ADDR_SERIAL    0x03
+	#define ADDR_MADE	   0x07
+	#define ADDR_CHKSUM	   0x0B
+	#define ADDR_SIGNATURE 0x1B
+	#define ADDR_INFO_LOCK 0x9B
+
+	#define ADDR_CONF_SF   0x9C
+	#define ADDR_CONF_CR   0x9D
+	#define ADDR_CONF_TXP  0x9E
+	#define ADDR_CONF_BW   0x9F
+	#define ADDR_CONF_FREQ 0xA3
+	#define ADDR_CONF_OK   0xA7
+
+	#define INFO_LOCK_BYTE 0x73
+	#define CONF_OK_BYTE   0x73
+
+	#define EEPROM_RESERVED 200
+#endif
\ No newline at end of file