diff --git a/board/sg-nfc-cmd.h b/board/sg-nfc-cmd.h
index c44586a..604783b 100644
--- a/board/sg-nfc-cmd.h
+++ b/board/sg-nfc-cmd.h
@@ -5,19 +5,21 @@
 #pragma pack(push, 1)
 
 enum {
-    SG_NFC_CMD_GET_FW_VERSION       = 0x30,
-    SG_NFC_CMD_GET_HW_VERSION       = 0x32,
-    SG_NFC_CMD_RADIO_ON             = 0x40,
-    SG_NFC_CMD_RADIO_OFF            = 0x41,
-    SG_NFC_CMD_POLL                 = 0x42,
-    SG_NFC_CMD_MIFARE_SELECT_TAG    = 0x43,
-    SG_NFC_CMD_MIFARE_SET_KEY_BANA  = 0x50,
-    SG_NFC_CMD_MIFARE_READ_BLOCK    = 0x52,
-    SG_NFC_CMD_MIFARE_SET_KEY_AIME  = 0x54,
-    SG_NFC_CMD_MIFARE_AUTHENTICATE  = 0x55, /* guess based on time sent */
-    SG_NFC_CMD_SEND_HEX_DATA        = 0x61,
-    SG_NFC_CMD_RESET                = 0x62,
-    SG_NFC_CMD_FELICA_ENCAP         = 0x71,
+    SG_NFC_CMD_GET_FW_VERSION        = 0x30,
+    SG_NFC_CMD_GET_HW_VERSION        = 0x32,
+    SG_NFC_CMD_RADIO_ON              = 0x40,
+    SG_NFC_CMD_RADIO_OFF             = 0x41,
+    SG_NFC_CMD_POLL                  = 0x42,
+    SG_NFC_CMD_MIFARE_SELECT_TAG     = 0x43,
+    SG_NFC_CMD_MIFARE_SET_KEY_A      = 0x50,
+    SG_NFC_CMD_MIFARE_AUTHENTICATE_A = 0x51,
+    SG_NFC_CMD_MIFARE_READ_BLOCK     = 0x52,
+    SG_NFC_CMD_MIFARE_SET_KEY_B      = 0x54,
+    SG_NFC_CMD_MIFARE_AUTHENTICATE_B = 0x55,
+    SG_NFC_CMD_TO_UPDATE_MODE        = 0x60,
+    SG_NFC_CMD_SEND_HEX_DATA         = 0x61,
+    SG_NFC_CMD_RESET                 = 0x62,
+    SG_NFC_CMD_FELICA_ENCAP          = 0x71,
 };
 
 struct sg_nfc_res_get_fw_version {
@@ -32,7 +34,7 @@ struct sg_nfc_res_get_hw_version {
 
 struct sg_nfc_req_mifare_set_key {
     struct sg_req_header req;
-    uint8_t key_a[6];
+    uint8_t key[6];
 };
 
 struct sg_nfc_req_mifare_50 {
diff --git a/board/sg-nfc.c b/board/sg-nfc.c
index 1f023be..19a6ad6 100644
--- a/board/sg-nfc.c
+++ b/board/sg-nfc.c
@@ -60,6 +60,11 @@ static HRESULT sg_nfc_cmd_felica_encap(
         const struct sg_nfc_req_felica_encap *req,
         struct sg_nfc_res_felica_encap *res);
 
+static HRESULT sg_nfc_cmd_send_hex_data(
+        struct sg_nfc *nfc,
+        const struct sg_req_header *req,
+        struct sg_res_header *res);
+
 static HRESULT sg_nfc_cmd_dummy(
         struct sg_nfc *nfc,
         const struct sg_req_header *req,
@@ -185,12 +190,15 @@ static HRESULT sg_nfc_dispatch(
                 &res->felica_encap);
 
     case SG_NFC_CMD_MIFARE_AUTHENTICATE:
+    case SG_NFC_CMD_SEND_HEX_DATA:
+        return sg_nfc_cmd_send_hex_data(nfc, &req->simple, &res->simple);
+
     case SG_NFC_CMD_MIFARE_SELECT_TAG:
     case SG_NFC_CMD_MIFARE_SET_KEY_AIME:
     case SG_NFC_CMD_MIFARE_SET_KEY_BANA:
     case SG_NFC_CMD_RADIO_ON:
     case SG_NFC_CMD_RADIO_OFF:
-    case SG_NFC_CMD_SEND_HEX_DATA: // TODO: implement?
+    case SG_NFC_CMD_TO_UPDATE_MODE:
         return sg_nfc_cmd_dummy(nfc, &req->simple, &res->simple);
 
     default:
@@ -442,6 +450,22 @@ static HRESULT sg_nfc_cmd_felica_encap(
     return S_OK;
 }
 
+static HRESULT sg_nfc_cmd_send_hex_data(
+        struct sg_nfc *nfc,
+        const struct sg_req_header *req,
+        struct sg_res_header *res)
+{
+    sg_res_init(res, req, 0);
+
+    /* Firmware checksum length? */
+    if (req->payload_len == 0x2b) {
+         /* The firmware is identical flag? */
+        res->status = 0x20;
+    }
+
+    return S_OK;
+}
+
 static HRESULT sg_nfc_cmd_dummy(
         struct sg_nfc *nfc,
         const struct sg_req_header *req,
diff --git a/dist/mu3/segatools.ini b/dist/mu3/segatools.ini
index 182e1d8..f24e510 100644
--- a/dist/mu3/segatools.ini
+++ b/dist/mu3/segatools.ini
@@ -190,7 +190,7 @@ leftSide=0x01   ; Mouse Left
 rightSide=0x02  ; Mouse Right
 
 right1=0x4A ; J
-right1=0x4B ; K
+right2=0x4B ; K
 right3=0x4C ; L
 
 leftMenu=0x55   ; U