sub_800BF4C

include/librfu.h

@@ -147,3 +147,5 @@ void rfu_REQ_stopMode(void);
 void rfu_waitREQComplete(void);
 u32 rfu_REQBN_softReset_and_checkID(void);
 void rfu_REQ_sendData(u8);
+void rfu_setMSCCallback(void (*func)(u16));
+void rfu_setREQCallback(void (*func)(u16, u16));

include/link_rfu.h

@@ -15,6 +15,9 @@ struct UnkRfuStruct_1 {
     u8 unk_08;
     u8 filler_09[4];
     u8 unk_0d;
+    u8 filler_0e[0x32];
+    void (*unk_40)(u8);
+    void (*unk_44)(void);
 };
 
 // Exported RAM declarations