diff --git a/Code/picocalc_keyboard/keyboard.h b/Code/picocalc_keyboard/keyboard.h
index 59d5836..69e5653 100644
--- a/Code/picocalc_keyboard/keyboard.h
+++ b/Code/picocalc_keyboard/keyboard.h
@@ -58,10 +58,6 @@ enum key_state
 #define KEY_F9 0x89
 #define KEY_F10 0x90
 
-#define BOOTMODE_DEFAULT  0x00 // normal boot mode
-#define BOOTMODE_SDCARD   0x01 // sdcard multiboot: loads .bin to FLASH+200K
-#define BOOTMODE_FWUPDATE 0x02 // enter BOOTSEL to upload .uf2 firmware
-
 typedef void (*key_callback)(char, enum key_state);
 typedef void (*lock_callback)(bool, bool);
 
@@ -70,7 +66,6 @@ void keyboard_set_key_callback(key_callback callback);
 void keyboard_set_lock_callback(lock_callback callback);
 bool keyboard_get_capslock(void);
 bool keyboard_get_numlock(void);
-uint8_t keyboard_get_bootmode(void);
 void keyboard_init(void);
 
 #define NUM_OF_COLS 8
diff --git a/Code/picocalc_keyboard/keyboard.ino b/Code/picocalc_keyboard/keyboard.ino
index 1dd194e..a7d57ff 100644
--- a/Code/picocalc_keyboard/keyboard.ino
+++ b/Code/picocalc_keyboard/keyboard.ino
@@ -78,8 +78,6 @@ static struct {
 
     bool numlock_changed;
     bool numlock;
-
-    uint8_t bootmode;
 } self;
 
 void output_string(char*str){
@@ -425,11 +423,6 @@ bool keyboard_get_numlock(void)
   return self.numlock;
 }
 
-uint8_t keyboard_get_bootmode(void)
-{
-  return self.bootmode;
-}
-
 void keyboard_init(void)
 {
   struct port_config port_init;
@@ -438,8 +431,6 @@ void keyboard_init(void)
   for (int i = 0; i < MOD_LAST; ++i)
     self.mods[i] = false;
 
-  self.bootmode = BOOTMODE_DEFAULT;
-
   // Rows
   port_init.direction = PORT_PIN_DIR_INPUT;
   port_init.input_pull = PORT_PIN_PULL_UP;
@@ -458,13 +449,5 @@ void keyboard_init(void)
   port_init.input_pull = PORT_PIN_PULL_UP;
   for(uint32_t i = 0; i < NUM_OF_BTNS; ++i)
     port_pin_set_config(btn_pins[i], &port_init);
-
-  //B12=left,B11=down [FWUPDATE],B10=up [SDCARD-MULTIBOOT],B9=right
-  if (port_pin_get_input_level(btn_pins[10]) == 0) {
-    self.bootmode = BOOTMODE_FWUPDATE;
-  }
-  if (port_pin_get_input_level(btn_pins[9]) == 0) {
-    self.bootmode = BOOTMODE_SDCARD;
-  }
 #endif
 }
diff --git a/Code/picocalc_keyboard/picocalc_keyboard.ino b/Code/picocalc_keyboard/picocalc_keyboard.ino
index 7a87f68..d1cb4a8 100644
--- a/Code/picocalc_keyboard/picocalc_keyboard.ino
+++ b/Code/picocalc_keyboard/picocalc_keyboard.ino
@@ -168,11 +168,6 @@ void receiveEvent(int howMany) {
       write_buffer[1] = js_bits;
       write_buffer_len = 2;
     }break;
-    case REG_ID_BOOT:{
-      write_buffer[0] = reg;
-      write_buffer[1] = keyboard_get_bootmode();
-      write_buffer_len = 2;
-    }break;
     default: {
       write_buffer[0] = 0;
       write_buffer[1] = 0;
diff --git a/Code/picocalc_keyboard/reg.h b/Code/picocalc_keyboard/reg.h
index 9a5371f..35f76b9 100644
--- a/Code/picocalc_keyboard/reg.h
+++ b/Code/picocalc_keyboard/reg.h
@@ -19,7 +19,6 @@ enum reg_id
   REG_ID_BAT = 0x0b,// battery
   REG_ID_C64_MTX = 0x0c,// read c64 matrix
   REG_ID_C64_JS = 0x0d, // joystick io bits
-  REG_ID_BOOT = 0x0e, // boot mode (see keyboard.h)
   REG_ID_LAST,
 };
 
diff --git a/Code/picocalc_keyboard/reg.ino b/Code/picocalc_keyboard/reg.ino
index 24015e5..c176ded 100644
--- a/Code/picocalc_keyboard/reg.ino
+++ b/Code/picocalc_keyboard/reg.ino
@@ -1,5 +1,4 @@
 #include "reg.h"
-#include "keyboard.h"
 
 static uint8_t regs[REG_ID_LAST];
 
@@ -43,5 +42,4 @@ void reg_init(void)
   regs[REG_ID_BKL] = 255;//100%duty
   regs[REG_ID_BK2] = 0;
   regs[REG_ID_BAT] = 0; //default .no battery ,no charging
-  regs[REG_ID_BOOT] = BOOTMODE_DEFAULT;
 }