diff --git a/src/Arduboy2.h b/src/Arduboy2.h
index 032a089..e0a26b5 100644
--- a/src/Arduboy2.h
+++ b/src/Arduboy2.h
@@ -53,6 +53,8 @@
 #define SYS_FLAG_SHOW_LOGO_MASK _BV(SYS_FLAG_SHOW_LOGO)
 #define SYS_FLAG_SHOW_LOGO_LEDS 2  // Flash the RGB led during the boot logo
 #define SYS_FLAG_SHOW_LOGO_LEDS_MASK _BV(SYS_FLAG_SHOW_LOGO_LEDS)
+#define SYS_FLAG_POWERON_MENU 7  // Start with FX loader menu after power on
+#define SYS_FLAG_POWERON_MENU_MASK _BV(SYS_FLAG_POWERON_MENU)
 
 /** \brief
  * Start of EEPROM storage space for sketches.
diff --git a/src/Arduboy2Core.cpp b/src/Arduboy2Core.cpp
index 98bf257..0beb551 100644
--- a/src/Arduboy2Core.cpp
+++ b/src/Arduboy2Core.cpp
@@ -233,7 +233,7 @@ void Arduboy2Core::bootSPI()
 }
 
 // Write to the SPI bus (MOSI pin)
-void Arduboy2Core::SPItransfer(uint8_t data)
+uint8_t Arduboy2Core::SPItransfer(uint8_t data)
 {
   SPDR = data;
   /*
@@ -244,6 +244,7 @@ void Arduboy2Core::SPItransfer(uint8_t data)
    */
   asm volatile("nop");
   while (!(SPSR & _BV(SPIF))) { } // wait
+  return SPDR;
 }
 
 void Arduboy2Core::safeMode()
diff --git a/src/Arduboy2Core.h b/src/Arduboy2Core.h
index 698c7a3..ad9c6c2 100644
--- a/src/Arduboy2Core.h
+++ b/src/Arduboy2Core.h
@@ -400,7 +400,7 @@ class Arduboy2Core
      *
      * \see LCDDataMode() LCDCommandMode() sendLCDCommand()
      */
-    void static SPItransfer(uint8_t data);
+    uint8_t static SPItransfer(uint8_t data);
 
     /** \brief
      * Turn the display off.