Updates bootloader settings, adds file size check (#2029)

* pull fuse settings for bootloader jump

* fix 32a chips

* make automatic bootloader selection optional

* quantify bootloaders

* fixs #164, speeds up dfu reset

* fix for chips w/o usb

* missing an n

* fix bootloader sizes, use words for addresses

* fix bmini, pearl, and [[ issue, make things quiet

* ignore avr errors on arm for now

* update settings for the light

* document bootloader stuff

* add bootloader title

76 files changed, 484 insertions, 551 deletions

diff --git a/bootloader.mk b/bootloader.mk
new file mode 100644
index 0000000000..55352f3d42
--- /dev/null
+++ b/bootloader.mk
@@ -0,0 +1,62 @@
+# Copyright 2017 Jack Humbert
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# If it's possible that multiple bootloaders can be used for one project,
+# you can leave this unset, and the correct size will be selected
+# automatically.
+#
+# Sets the bootloader defined in the keyboard's/keymap's rules.mk
+# Current options:
+#   atmel-dfu
+#   lufa-dfu
+#   qmk-dfu
+#   halfkay
+#   caterina
+#   bootloadHID
+#
+# BOOTLOADER_SIZE can still be defined manually, but it's recommended
+# you add any possible configuration to this list
+
+ifeq ($(strip $(BOOTLOADER)), atmel-dfu)
+    OPT_DEFS += -DBOOTLOADER_ATMEL_DFU
+    OPT_DEFS += -DBOOTLOADER_DFU
+    BOOTLOADER_SIZE = 4096
+endif
+ifeq ($(strip $(BOOTLOADER)), lufa-dfu)
+    OPT_DEFS += -DBOOTLOADER_LUFA_DFU
+    OPT_DEFS += -DBOOTLOADER_DFU
+    BOOTLOADER_SIZE = 4096
+endif
+ifeq ($(strip $(BOOTLOADER)), qmk-dfu)
+    OPT_DEFS += -DBOOTLOADER_QMK_DFU
+    OPT_DEFS += -DBOOTLOADER_DFU
+    BOOTLOADER_SIZE = 4096
+endif
+ifeq ($(strip $(BOOTLOADER)), halfkay)
+    OPT_DEFS += -DBOOTLOADER_HALFKAY
+    BOOTLOADER_SIZE = 512
+endif
+ifeq ($(strip $(BOOTLOADER)), caterina)
+    OPT_DEFS += -DBOOTLOADER_CATERINA
+    BOOTLOADER_SIZE = 4096
+endif
+ifeq ($(strip $(BOOTLOADER)), bootloadHID)
+    OPT_DEFS += -DBOOTLOADER_BOOTLOADHID
+    BOOTLOADER_SIZE = 4096
+endif
+
+ifdef BOOTLOADER_SIZE
+    OPT_DEFS += -DBOOTLOADER_SIZE=$(strip $(BOOTLOADER_SIZE))
+endif
\ No newline at end of file
diff --git a/build_keyboard.mk b/build_keyboard.mk
index df025714db..cbdaaa0104 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -230,6 +230,7 @@ VPATH += $(USER_PATH)
 include common_features.mk
 include $(TMK_PATH)/protocol.mk
 include $(TMK_PATH)/common.mk
+include bootloader.mk
 
 SRC += $(TMK_COMMON_SRC)
 OPT_DEFS += $(TMK_COMMON_DEFS)
@@ -266,10 +267,10 @@ $(KEYBOARD_OUTPUT)_INC := $(PROJECT_INC) $(GFXINC)
 $(KEYBOARD_OUTPUT)_CONFIG := $(PROJECT_CONFIG)
 
 # Default target.
-all: build sizeafter
+all: build check-size
 
 # Change the build target to build a HEX file or a library.
-build: elf hex
+build: elf cphex
 #build: elf hex eep lss sym
 #build: lib
 
diff --git a/docs/flashing.md b/docs/flashing.md
index a61634d215..5b3c1a4447 100644
--- a/docs/flashing.md
+++ b/docs/flashing.md
@@ -1,12 +1,20 @@
-# Flashing Intrustructions
+# Flashing Intrustructions / Bootloader Information
 
 There are quite a few different types of bootloaders that keyboards use, and just about all of the use a different flashing method. Luckily, projects like the [QMK Toolbox](https://github.com/qmk/qmk_toolbox/releases) aim to be compatible with all the different types without having to think about it much, but this article will describe the different types of bootloaders, and available methods for flashing them.
 
+If you have a bootloader selected with the `BOOTLOADER` variable in your `rules.mk`, QMK will automatically calculate if your .hex file is the right size to be flashed to the device, and output the total size it bytes (along with the max). To run this process manually, compile with the target `check-size`, eg `make planck/rev4:default:check-size`.
+
 ## DFU
 
 Atmel's DFU bootloader comes on all atmega32u4 chips by default, and is used by many keyboards that have their own ICs on their PCBs (Older OLKB boards, Clueboards). Some keyboards may also use LUFA's DFU bootloader (or QMK's fork) (Newer OLKB boards) that adds in additional features specific to that hardware.
 
-These bootloaders are usually 4096 bytes for the atmega32u4 chip. 
+To ensure compatability with the DFU bootloader, make sure this block is present your `rules.mk` (optionally with `lufa-dfu` or `qmk-dfu` instead):
+
+    # Bootloader
+    #     This definition is optional, and if your keyboard supports multiple bootloaders of
+    #     different sizes, comment this out, and the correct address will be loaded 
+    #     automatically (+60). See bootloader.mk for all options.
+    BOOTLOADER = atmel-dfu
 
 Compatible flashers:
 
@@ -26,15 +34,32 @@ or:
 
     make <keyboard>:<keymap>:dfu
 
+### QMK DFU
+
+QMK has a fork of the LUFA DFU bootloader that allows for a simple matrix scan for exiting the bootloader and returning to the application, as well as flashing an LED/making a ticking noise with a speaker when things are happening. To enable these features, use this block in your `config.h` (The key that exits the bootloader needs to be hooked-up to the INPUT and OUTPUT defined here):
+
+    #define QMK_ESC_OUTPUT F1 // usually COL
+    #define QMK_ESC_INPUT D5 // usually ROW
+    #define QMK_LED E6
+    #define QMK_SPEAKER C6
+
+The Manufacturer and Product names are automatically pulled from your `config.h`, and "Bootloader" is added to the product.
+
+To generate this bootloader, use the `bootloader` target, eg `make planck/rev4:default:bootloader`.
+
+To generate a production-ready .hex file (containing the application and the bootloader), use the `production` target, eg `make planck/rev4:default:production`.
+
 ## Caterina
 
 Arduino boards and their clones use the [Caterina bootloader](https://github.com/arduino/Arduino/tree/master/hardware/arduino/avr/bootloaders/caterina) (any keyboard built with a Pro Micro, or clone), and uses the avr109 protocol to communicate through virtual serial. Bootloaders like [A-Star](https://www.pololu.com/docs/0J61/9) are based on Caterina.
 
-This block of code allows for Caterina compatibility in QMK:
+To ensure compatability with the Caterina bootloader, make sure this block is present your `rules.mk`:
 
-    #define CATERINA_BOOTLOADER
-
-These bootloaders are usually 4096 bytes for the atmega32u4 chip. 
+    # Bootloader
+    #     This definition is optional, and if your keyboard supports multiple bootloaders of
+    #     different sizes, comment this out, and the correct address will be loaded 
+    #     automatically (+60). See bootloader.mk for all options.
+    BOOTLOADER = caterina
 
 Compatible flashers:
 
@@ -57,7 +82,13 @@ or
 
 Halfkay is a super-slim protocol developed by PJRC that uses HID, and come on all Teensys (namely the 2.0).
 
-This bootloader is 512 bytes.
+To ensure compatability with the Halfkay bootloader, make sure this block is present your `rules.mk`:
+
+    # Bootloader
+    #     This definition is optional, and if your keyboard supports multiple bootloaders of
+    #     different sizes, comment this out, and the correct address will be loaded 
+    #     automatically (+60). See bootloader.mk for all options.
+    BOOTLOADER = halfkay
 
 Compatible flashers:
 
diff --git a/keyboards/atreus/rules.mk b/keyboards/atreus/rules.mk
index 0a254d0e79..2c8418beb7 100644
--- a/keyboards/atreus/rules.mk
+++ b/keyboards/atreus/rules.mk
@@ -5,7 +5,6 @@ ifdef TEENSY2
     ATREUS_UPLOAD_COMMAND = teensy_loader_cli -w -mmcu=$(MCU) $(TARGET).hex
 else
     OPT_DEFS += -DATREUS_ASTAR
-    OPT_DEFS += -DCATERINA_BOOTLOADER
     ATREUS_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                             avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 endif
@@ -27,7 +26,6 @@ MCU = atmega32u4
 #     software delays.
 F_CPU = 16000000
 
-
 #
 # LUFA specific
 #
@@ -47,19 +45,20 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+ifdef TEENSY2
+    BOOTLOADER = halfkay
+else
+    BOOTLOADER = caterina
+endif
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
 
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/atreus62/config.h b/keyboards/atreus62/config.h
index 90a4aa05a6..8d9248947c 100644
--- a/keyboards/atreus62/config.h
+++ b/keyboards/atreus62/config.h
@@ -38,8 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D2, D3, D1, D0, D4 }
 #define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3, B2, B6, B5, B4, E6, D7, C6 }
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION ROW2COL
 
diff --git a/keyboards/atreus62/rules.mk b/keyboards/atreus62/rules.mk
index ca399e9c56..66f6660c6e 100644
--- a/keyboards/atreus62/rules.mk
+++ b/keyboards/atreus62/rules.mk
@@ -35,18 +35,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/bfake/config.h b/keyboards/bfake/config.h
index c52d9175b8..c0e0face5a 100644
--- a/keyboards/bfake/config.h
+++ b/keyboards/bfake/config.h
@@ -41,7 +41,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/bfake/rules.mk b/keyboards/bfake/rules.mk
index d089858273..9165de4248 100644
--- a/keyboards/bfake/rules.mk
+++ b/keyboards/bfake/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/keyboards/bmini/config.h b/keyboards/bmini/config.h
index 90b315b7c5..b7a25e050e 100644
--- a/keyboards/bmini/config.h
+++ b/keyboards/bmini/config.h
@@ -34,7 +34,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/bmini/rules.mk b/keyboards/bmini/rules.mk
index 41a87973d4..73c361e2a8 100644
--- a/keyboards/bmini/rules.mk
+++ b/keyboards/bmini/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/keyboards/chimera_ortho/rules.mk b/keyboards/chimera_ortho/rules.mk
index 098bf28fa5..4f95949f9f 100644
--- a/keyboards/chimera_ortho/rules.mk
+++ b/keyboards/chimera_ortho/rules.mk
@@ -1,6 +1,5 @@
 
 OPT_DEFS += -DCHIMERA_ORTHO_PROMICRO
-OPT_DEFS += -DCATERINA_BOOTLOADER
 CHIMERA_ORTHO_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                          avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 
@@ -45,19 +44,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/converter/usb_usb/ble/rules.mk b/keyboards/converter/usb_usb/ble/rules.mk
index c951780e20..16090962d9 100644
--- a/keyboards/converter/usb_usb/ble/rules.mk
+++ b/keyboards/converter/usb_usb/ble/rules.mk
@@ -1,4 +1,3 @@
 BLUETOOTH = AdafruitBLE
 ADAFRUIT_BLE_ENABLE = yes
-OPT_DEFS +=  -DCATERINA_BOOTLOADER
 F_CPU = 8000000
diff --git a/keyboards/converter/usb_usb/rules.mk b/keyboards/converter/usb_usb/rules.mk
index b0e07c7649..7a8f24bb49 100644
--- a/keyboards/converter/usb_usb/rules.mk
+++ b/keyboards/converter/usb_usb/rules.mk
@@ -43,19 +43,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/deltasplit75/rules.mk b/keyboards/deltasplit75/rules.mk
index e345d61f56..2a13dbdfc6 100644
--- a/keyboards/deltasplit75/rules.mk
+++ b/keyboards/deltasplit75/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/deltasplit75/v2/config.h b/keyboards/deltasplit75/v2/config.h
index b677d09aa9..319a149fbc 100644
--- a/keyboards/deltasplit75/v2/config.h
+++ b/keyboards/deltasplit75/v2/config.h
@@ -37,8 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { F4, F5, F6, F7, B1, B3, B2 }
 #define MATRIX_COL_PINS { B6, B5, B4, E6, D7, C6, D4, D1}
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/dichotemy/rules.mk b/keyboards/dichotemy/rules.mk
index c8a316f843..4e9db86875 100644
--- a/keyboards/dichotemy/rules.mk
+++ b/keyboards/dichotemy/rules.mk
@@ -1,6 +1,5 @@
 
 OPT_DEFS += -DDICHOTEMY_PROMICRO
-OPT_DEFS += -DCATERINA_BOOTLOADER
 DICHOTEMY_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                          avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 
@@ -25,8 +24,6 @@ MCU = atmega32u4
 #     software delays.
 F_CPU = 16000000
 
-
-#
 # LUFA specific
 #
 # Target architecture (see library "Board Types" documentation).
@@ -45,19 +42,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/eco/config.h b/keyboards/eco/config.h
index 99b057496f..f6b78631ea 100644
--- a/keyboards/eco/config.h
+++ b/keyboards/eco/config.h
@@ -31,8 +31,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 4
 #define MATRIX_COLS 14
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/eco/rules.mk b/keyboards/eco/rules.mk
index 6f4b4fefc4..35ee906b1e 100644
--- a/keyboards/eco/rules.mk
+++ b/keyboards/eco/rules.mk
@@ -34,18 +34,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in 
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/ergodox_ez/rules.mk b/keyboards/ergodox_ez/rules.mk
index 3d6b18fea9..4d2c461085 100644
--- a/keyboards/ergodox_ez/rules.mk
+++ b/keyboards/ergodox_ez/rules.mk
@@ -54,18 +54,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = halfkay
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=512
-
 # If you have Left LEDs (see
 # https://geekhack.org/index.php?topic=22780.msg873819#msg873819 for
 # details), include the following define:
diff --git a/keyboards/gherkin/keymaps/mjt/config.h b/keyboards/gherkin/keymaps/mjt/config.h
index 9c9f038389..bb59ec213d 100644
--- a/keyboards/gherkin/keymaps/mjt/config.h
+++ b/keyboards/gherkin/keymaps/mjt/config.h
@@ -52,8 +52,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { F7, B1, B3, B2, B6 }
 #define MATRIX_COL_PINS { B4, E6, D7, F6, D4, D0 }
 
-#define CATERINA_BOOTLOADER
-
 #define UNUSED_PINS
 
 /* COL2ROW or ROW2COL */
diff --git a/keyboards/gherkin/rules.mk b/keyboards/gherkin/rules.mk
index 6bb9edb35a..530898bd78 100644
--- a/keyboards/gherkin/rules.mk
+++ b/keyboards/gherkin/rules.mk
@@ -33,14 +33,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/handwired/MS_sculpt_mobile/rules.mk b/keyboards/handwired/MS_sculpt_mobile/rules.mk
index 53769f81f4..680c057d36 100644
--- a/keyboards/handwired/MS_sculpt_mobile/rules.mk
+++ b/keyboards/handwired/MS_sculpt_mobile/rules.mk
@@ -5,21 +5,29 @@ SRC=  babblePaste.c
 
 ifdef ASTAR
   CFLAGS=-D ASTAR
- OPT_DEFS += -DBOOTLOADER_SIZE=4096
  MCU = atmega32u4
- OPT_DEFS += -DCATERINA_BOOTLOADER
  SCULPT_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done ; \
 		 avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 
 else
  MCU = at90usb1286
- OPT_DEFS += -DBOOTLOADER_SIZE=2048
  SCULPT_UPLOAD_COMMAND = teensy_loader_cli -w -mmcu=$(MCU) $(TARGET).hex
 endif
 
 F_CPU = 16000000
 ARCH = AVR8
 F_USB = $(F_CPU)
+
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+ifdef ASTAR
+  BOOTLOADER = caterina
+else
+  BOOTLOADER = atmel-dfu
+endif
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
diff --git a/keyboards/handwired/reddot/rules.mk b/keyboards/handwired/reddot/rules.mk
index 4929968410..00ca06dd40 100755
--- a/keyboards/handwired/reddot/rules.mk
+++ b/keyboards/handwired/reddot/rules.mk
@@ -36,30 +36,25 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
-
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
 ifdef TEENSY2
+    BOOTLOADER = halfkay
     OPT_DEFS += -DATREUS_TEENSY2
     ATREUS_UPLOAD_COMMAND = teensy_loader_cli -w -mmcu=$(MCU) $(TARGET).hex
 else
+    BOOTLOADER = caterina
     OPT_DEFS += -DATREUS_ASTAR
-    OPT_DEFS += -DCATERINA_BOOTLOADER
     ATREUS_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                             avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 endif
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
 
-# MCU name
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 
 # Build Options
 #   change yes to no to disable
diff --git a/keyboards/handwired/space_oddity/config.h b/keyboards/handwired/space_oddity/config.h
index 88cc5ad00e..9c9361ced7 100644
--- a/keyboards/handwired/space_oddity/config.h
+++ b/keyboards/handwired/space_oddity/config.h
@@ -11,8 +11,6 @@
 #define PRODUCT         Space Odyssey
 #define DESCRIPTION     Keyboard
 
-#define CATERINA_BOOTLOADER
-
 #define MOUSEKEY_INTERVAL 16
 #define MOUSEKEY_DELAY 0
 #define MOUSEKEY_TIME_TO_MAX 60
diff --git a/keyboards/handwired/space_oddity/rules.mk b/keyboards/handwired/space_oddity/rules.mk
index 170c64a30e..4dc93fad9e 100644
--- a/keyboards/handwired/space_oddity/rules.mk
+++ b/keyboards/handwired/space_oddity/rules.mk
@@ -33,14 +33,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/handwired/traveller/rules.mk b/keyboards/handwired/traveller/rules.mk
index 62f94b9452..8568def354 100644
--- a/keyboards/handwired/traveller/rules.mk
+++ b/keyboards/handwired/traveller/rules.mk
@@ -37,15 +37,23 @@ ARCH = AVR8
 F_USB = $(F_CPU)
 
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
 ifdef TEENSY2
+    BOOTLOADER = halfkay
     OPT_DEFS += -DATREUS_TEENSY2
     ATREUS_UPLOAD_COMMAND = teensy_loader_cli -w -mmcu=$(MCU) $(TARGET).hex
 else
+    BOOTLOADER = caterina
     OPT_DEFS += -DATREUS_ASTAR
-    OPT_DEFS += -DCATERINA_BOOTLOADER
     ATREUS_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                             avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 endif
+
+
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
diff --git a/keyboards/handwired/woodpad/config.h b/keyboards/handwired/woodpad/config.h
index 39a466850e..b2eb7020fc 100644
--- a/keyboards/handwired/woodpad/config.h
+++ b/keyboards/handwired/woodpad/config.h
@@ -53,8 +53,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define BACKLIGHT_BREATHING
 // #define BACKLIGHT_LEVELS 3
 
-#define CATERINA_BOOTLOADER
-
 /* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
 #define DEBOUNCING_DELAY 5
 
diff --git a/keyboards/handwired/woodpad/rules.mk b/keyboards/handwired/woodpad/rules.mk
index 7612f4b49c..11f096581e 100644
--- a/keyboards/handwired/woodpad/rules.mk
+++ b/keyboards/handwired/woodpad/rules.mk
@@ -35,19 +35,16 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
 
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/iris/rev1/config.h b/keyboards/iris/rev1/config.h
index 10f435a4fc..c9bc625289 100644
--- a/keyboards/iris/rev1/config.h
+++ b/keyboards/iris/rev1/config.h
@@ -37,8 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D7, E6, B4, B5, D4 }
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, F4 }
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/iris/rev2/config.h b/keyboards/iris/rev2/config.h
index 4ba21a58a6..290fba4502 100644
--- a/keyboards/iris/rev2/config.h
+++ b/keyboards/iris/rev2/config.h
@@ -37,8 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D7, E6, B4, D2, D4 }
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/iris/rules.mk b/keyboards/iris/rules.mk
index 0280e9d1a6..db4bf3a1e4 100644
--- a/keyboards/iris/rules.mk
+++ b/keyboards/iris/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/jj40/config.h b/keyboards/jj40/config.h
index 42a37c957f..02339a33f7 100644
--- a/keyboards/jj40/config.h
+++ b/keyboards/jj40/config.h
@@ -38,7 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define TAPPING_TOGGLE 3
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/jj40/program b/keyboards/jj40/program
deleted file mode 100755
index 81552c2723..0000000000
--- a/keyboards/jj40/program
+++ /dev/null
@@ -1,74 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-from __future__ import print_function
-
-import os
-import sys
-import time
-import usb
-
-if len(sys.argv) < 2:
-    print('Usage: %s <firmware.hex>' % sys.argv[0])
-    sys.exit(1)
-
-print('Searching for jj40... ', end='')
-
-dev = usb.core.find(idVendor=0x20A0, idProduct=0x422D)
-if dev is None:
-    raise ValueError('Device not found')
-
-print('Found', end='\n\n')
-
-print('Device Information:')
-print('  idVendor: %d (0x%04x)' % (dev.idVendor, dev.idVendor))
-print('  idProduct: %d (0x%04x)' % (dev.idProduct, dev.idProduct))
-print('Manufacturer: %s' % (dev.iManufacturer))
-print('Serial: %s' % (dev.iSerialNumber))
-print('Product: %s' % (dev.iProduct), end='\n\n')
-
-print('Transferring control to bootloader... ', end='')
-
-dev.set_configuration()
-
-request_type = usb.util.build_request_type(
-        usb.util.CTRL_OUT,
-        usb.util.CTRL_TYPE_CLASS,
-        usb.util.CTRL_RECIPIENT_DEVICE)
-
-USBRQ_HID_SET_REPORT = 0x09
-HID_REPORT_OPTION = 0x0301
-
-
-try:
-    dev.ctrl_transfer(
-            request_type,
-            USBRQ_HID_SET_REPORT,
-            HID_REPORT_OPTION,
-            0,
-            [0, 0, 0xFF] + [0] * 5
-            )
-except usb.core.USBError:
-    # for some reason I keep getting USBError, but it works!
-    pass
-
-# wait a bit until bootloader starts up
-time.sleep(2)
-
-print('OK')
-print('Programming...')
-if os.system('bootloadHID -r "%s"' % sys.argv[1]) == 0:
-    print('\nDone!')
diff --git a/keyboards/jj40/rules.mk b/keyboards/jj40/rules.mk
index c39ebf2225..c6279a2a51 100644
--- a/keyboards/jj40/rules.mk
+++ b/keyboards/jj40/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
 # build options
 BOOTMAGIC_ENABLE = no
 MOUSEKEY_ENABLE = no
@@ -39,11 +45,10 @@ KEY_LOCK_ENABLE = yes
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
 SRC = matrix.c i2c.c
 
 # programming options
-PROGRAM_CMD = ./keyboards/jj40/program $(TARGET).hex
+PROGRAM_CMD = ./util/atmega32a_program.py $(TARGET).hex
diff --git a/keyboards/lets_split/rev1/config.h b/keyboards/lets_split/rev1/config.h
index 7c128421dd..73f90e715d 100644
--- a/keyboards/lets_split/rev1/config.h
+++ b/keyboards/lets_split/rev1/config.h
@@ -39,9 +39,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3 }
 // #define MATRIX_COL_PINS { B3, B1, F7, F6, F5, F4 } //uncomment this line and comment line above if you need to reverse left-to-right key order
 
-
-#define CATERINA_BOOTLOADER
-
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/lets_split/rev2/config.h b/keyboards/lets_split/rev2/config.h
index 1f0603d501..1c48f38e05 100644
--- a/keyboards/lets_split/rev2/config.h
+++ b/keyboards/lets_split/rev2/config.h
@@ -39,8 +39,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }
 // #define MATRIX_COL_PINS { B6, B2, B3, B1, F7, F6 } //uncomment this line and comment line above if you need to reverse left-to-right key order
 
-#define CATERINA_BOOTLOADER
-
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/lets_split/rules.mk b/keyboards/lets_split/rules.mk
index 1bbc0367fa..f9dc127bc6 100644
--- a/keyboards/lets_split/rules.mk
+++ b/keyboards/lets_split/rules.mk
@@ -40,18 +40,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/lets_split/sockets/config.h b/keyboards/lets_split/sockets/config.h
index 0543e8930d..70ebcb8c23 100644
--- a/keyboards/lets_split/sockets/config.h
+++ b/keyboards/lets_split/sockets/config.h
@@ -39,8 +39,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { F4, F7, D7, B3, B2, B6}
 // #define MATRIX_COL_PINS { B6, B2, B3, C6, F7, F4 } //uncomment this line and comment line above if you need to reverse left-to-right key order
 
-#define CATERINA_BOOTLOADER
-
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/levinson/rev1/config.h b/keyboards/levinson/rev1/config.h
index 7c8b9b0b92..ddccbc47a9 100644
--- a/keyboards/levinson/rev1/config.h
+++ b/keyboards/levinson/rev1/config.h
@@ -38,8 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, F4 }
 
-#define CATERINA_BOOTLOADER
-
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/levinson/rev2/config.h b/keyboards/levinson/rev2/config.h
index 27d451a3b2..51ae5cd3c7 100644
--- a/keyboards/levinson/rev2/config.h
+++ b/keyboards/levinson/rev2/config.h
@@ -38,9 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D4, D7, E6, B4 }
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }
 
-
-#define CATERINA_BOOTLOADER
-
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/levinson/rules.mk b/keyboards/levinson/rules.mk
index 0ca19e9a00..8e67497f4b 100644
--- a/keyboards/levinson/rules.mk
+++ b/keyboards/levinson/rules.mk
@@ -40,18 +40,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/mechmini/config.h b/keyboards/mechmini/config.h
index 96f4bb51e4..e7004608e1 100644
--- a/keyboards/mechmini/config.h
+++ b/keyboards/mechmini/config.h
@@ -35,7 +35,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_DI_PIN E2
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/mechmini/rules.mk b/keyboards/mechmini/rules.mk
index d089858273..ed55ae1c43 100644
--- a/keyboards/mechmini/rules.mk
+++ b/keyboards/mechmini/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = atmel-dfu
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/keyboards/minidox/rev1/config.h b/keyboards/minidox/rev1/config.h
index 9799c41994..b7272bdb05 100644
--- a/keyboards/minidox/rev1/config.h
+++ b/keyboards/minidox/rev1/config.h
@@ -26,8 +26,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { B2, B6, B4, B5 }
 #define MATRIX_COL_PINS { F4, D3, D2, D1, D4 }
 
-#define CATERINA_BOOTLOADER
-
 #define USE_SERIAL
 
 //#define EE_HANDS
diff --git a/keyboards/minidox/rules.mk b/keyboards/minidox/rules.mk
index 0f9d303105..0c3a03bd73 100644
--- a/keyboards/minidox/rules.mk
+++ b/keyboards/minidox/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/mitosis/rules.mk b/keyboards/mitosis/rules.mk
index 903edb1092..0db144ed32 100644
--- a/keyboards/mitosis/rules.mk
+++ b/keyboards/mitosis/rules.mk
@@ -1,6 +1,5 @@
 
 OPT_DEFS += -DMITOSIS_PROMICRO
-OPT_DEFS += -DCATERINA_BOOTLOADER
 MITOSIS_UPLOAD_COMMAND = while [ ! -r $(USB) ]; do sleep 1; done; \
                          avrdude -p $(MCU) -c avr109 -U flash:w:$(TARGET).hex -P $(USB)
 
@@ -25,7 +24,6 @@ MCU = atmega32u4
 #     software delays.
 F_CPU = 16000000
 
-
 #
 # LUFA specific
 #
@@ -45,19 +43,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-
 # Build Options
 #   comment out to disable the options.
 #
diff --git a/keyboards/mt40/config.h b/keyboards/mt40/config.h
index 394cc78981..6c82b2c74f 100644
--- a/keyboards/mt40/config.h
+++ b/keyboards/mt40/config.h
@@ -44,7 +44,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_VAL_STEP 18
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 #define TAPPING_TERM 200
 
diff --git a/keyboards/mt40/program b/keyboards/mt40/program
deleted file mode 100755
index e8786f566d..0000000000
--- a/keyboards/mt40/program
+++ /dev/null
@@ -1,74 +0,0 @@
-#!/usr/bin/env python2.7
-# Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-from __future__ import print_function
-
-import os
-import sys
-import time
-import usb
-
-if len(sys.argv) < 2:
-    print('Usage: %s <firmware.hex>' % sys.argv[0])
-    sys.exit(1)
-
-print('Searching for planck clone keyboard... ', end='')
-
-dev = usb.core.find(idVendor=0x20A0, idProduct=0x422D)
-if dev is None:
-    raise ValueError('Device not found')
-
-print('Found', end='\n\n')
-
-print('Device Information:')
-print('  idVendor: %d (0x%04x)' % (dev.idVendor, dev.idVendor))
-print('  idProduct: %d (0x%04x)' % (dev.idProduct, dev.idProduct))
-print('Manufacturer: %s' % (dev.iManufacturer))
-print('Serial: %s' % (dev.iSerialNumber))
-print('Product: %s' % (dev.iProduct), end='\n\n')
-
-print('Transferring control to bootloader... ', end='')
-
-dev.set_configuration()
-
-request_type = usb.util.build_request_type(
-        usb.util.CTRL_OUT,
-        usb.util.CTRL_TYPE_CLASS,
-        usb.util.CTRL_RECIPIENT_DEVICE)
-
-USBRQ_HID_SET_REPORT = 0x09
-HID_REPORT_OPTION = 0x0301
-
-
-try:
-    dev.ctrl_transfer(
-            request_type,
-            USBRQ_HID_SET_REPORT,
-            HID_REPORT_OPTION,
-            0,
-            [0, 0, 0xFF] + [0] * 5
-            )
-except usb.core.USBError:
-    # for some reason I keep getting USBError, but it works!
-    pass
-
-# wait a bit until bootloader starts up
-time.sleep(2)
-
-print('OK')
-print('Programming...')
-if os.system('bootloadHID -r "%s"' % sys.argv[1]) == 0:
-    print('\nDone!')
diff --git a/keyboards/mt40/rules.mk b/keyboards/mt40/rules.mk
index 10023da0ee..9d230d2388 100644
--- a/keyboards/mt40/rules.mk
+++ b/keyboards/mt40/rules.mk
@@ -9,6 +9,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
 # build options
 BOOTMAGIC_ENABLE ?= yes # Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE ?= no   # Mouse keys(+4700)
@@ -26,11 +32,10 @@ RGBLIGHT_CUSTOM_DRIVER = yes
 TAP_DANCE_ENABLE = no
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
 SRC = matrix.c i2c.c
 
 # programming options
-PROGRAM_CMD = ./keyboards/mt40/program $(TARGET).hex
+PROGRAM_CMD = ./util/atmega32a_program.py $(TARGET).hex
diff --git a/keyboards/nyquist/rev1/config.h b/keyboards/nyquist/rev1/config.h
index 3615768871..4430f254cb 100644
--- a/keyboards/nyquist/rev1/config.h
+++ b/keyboards/nyquist/rev1/config.h
@@ -37,8 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D4, D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/nyquist/rules.mk b/keyboards/nyquist/rules.mk
index f2bc59cc5d..971cd188a8 100644
--- a/keyboards/nyquist/rules.mk
+++ b/keyboards/nyquist/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/orthodox/rev1/config.h b/keyboards/orthodox/rev1/config.h
index 26715f4096..d6564f281c 100644
--- a/keyboards/orthodox/rev1/config.h
+++ b/keyboards/orthodox/rev1/config.h
@@ -51,8 +51,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { D2, F5, F6, F7, B6, B5, B4, D7, D6 }
 /*/
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/orthodox/rules.mk b/keyboards/orthodox/rules.mk
index 48d6551bc7..d7ea0d49dc 100644
--- a/keyboards/orthodox/rules.mk
+++ b/keyboards/orthodox/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/pearl/config.h b/keyboards/pearl/config.h
index 99a93ee798..47a732f768 100644
--- a/keyboards/pearl/config.h
+++ b/keyboards/pearl/config.h
@@ -27,7 +27,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DESCRIPTION  40% keyboard
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 #define RGBLIGHT_ANIMATIONS
 #define RGBLED_NUM 12
diff --git a/keyboards/pearl/rules.mk b/keyboards/pearl/rules.mk
index d089858273..9165de4248 100644
--- a/keyboards/pearl/rules.mk
+++ b/keyboards/pearl/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = bootloadHID
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/keyboards/planck/light/rules.mk b/keyboards/planck/light/rules.mk
index 02c39c43a0..1225a5d28d 100644
--- a/keyboards/planck/light/rules.mk
+++ b/keyboards/planck/light/rules.mk
@@ -4,6 +4,4 @@ MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
 NKRO_ENABLE = yes            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
 
-OPT_DEFS += -DBOOTLOADER_SIZE=8192
-
 MCU = at90usb1286
\ No newline at end of file
diff --git a/keyboards/planck/rev3/rules.mk b/keyboards/planck/rev3/rules.mk
index 9ecde59583..e51af55c66 100644
--- a/keyboards/planck/rev3/rules.mk
+++ b/keyboards/planck/rev3/rules.mk
@@ -1,10 +1 @@
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 AUDIO_ENABLE = no           # Audio output on port C6
diff --git a/keyboards/planck/rev4/rules.mk b/keyboards/planck/rev4/rules.mk
index 0001fb50f7..7e64e7edc4 100644
--- a/keyboards/planck/rev4/rules.mk
+++ b/keyboards/planck/rev4/rules.mk
@@ -1,9 +1 @@
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 AUDIO_ENABLE = yes           # Audio output on port C6
diff --git a/keyboards/planck/rev5/rules.mk b/keyboards/planck/rev5/rules.mk
index 29eae4b495..3b22e0a01b 100644
--- a/keyboards/planck/rev5/rules.mk
+++ b/keyboards/planck/rev5/rules.mk
@@ -1,9 +1 @@
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 AUDIO_ENABLE = yes           # Audio output on port C6
\ No newline at end of file
diff --git a/keyboards/planck/rules.mk b/keyboards/planck/rules.mk
index 1fed5fa58a..439f7db645 100644
--- a/keyboards/planck/rules.mk
+++ b/keyboards/planck/rules.mk
@@ -34,6 +34,23 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+ifeq ($(strip $(KEYBOARD)), planck/rev3)
+    BOOTLOADER = atmel-dfu
+endif
+ifeq ($(strip $(KEYBOARD)), planck/rev4)
+    BOOTLOADER = atmel-dfu
+endif
+ifeq ($(strip $(KEYBOARD)), planck/rev5)
+    BOOTLOADER = qmk-dfu
+endif
+ifeq ($(strip $(KEYBOARD)), planck/light)
+    BOOTLOADER = qmk-dfu
+endif
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
@@ -46,9 +63,9 @@ MOUSEKEY_ENABLE = no       # Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = yes         # Console for debug(+400)
 COMMAND_ENABLE = no        # Commands for debug and configuration
-NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
-MIDI_ENABLE = no            # MIDI controls
+MIDI_ENABLE = yes            # MIDI controls
 AUDIO_ENABLE = yes           # Audio output on port C6
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
diff --git a/keyboards/preonic/rules.mk b/keyboards/preonic/rules.mk
index acef4d9713..60087e9785 100644
--- a/keyboards/preonic/rules.mk
+++ b/keyboards/preonic/rules.mk
@@ -36,18 +36,20 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+ifeq ($(strip $(KEYBOARD)), preonic/rev1)
+    BOOTLOADER = atmel-dfu
+endif
+ifeq ($(strip $(KEYBOARD)), preonic/rev2)
+    BOOTLOADER = qmk-dfu
+endif
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in 
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/ps2avrGB/config.h b/keyboards/ps2avrGB/config.h
index 57ec985193..f62de1653a 100644
--- a/keyboards/ps2avrGB/config.h
+++ b/keyboards/ps2avrGB/config.h
@@ -27,7 +27,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/ps2avrGB/rules.mk b/keyboards/ps2avrGB/rules.mk
index 9e76993c4a..c7c12dcf17 100644
--- a/keyboards/ps2avrGB/rules.mk
+++ b/keyboards/ps2avrGB/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = atmel-dfu
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/keyboards/viterbi/rev1/config.h b/keyboards/viterbi/rev1/config.h
index 68ca5f3626..3400ea31a1 100644
--- a/keyboards/viterbi/rev1/config.h
+++ b/keyboards/viterbi/rev1/config.h
@@ -37,8 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS { D4, D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { F5, F6, F7, B1, B3, B2, B6 }
 
-#define CATERINA_BOOTLOADER
-
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
diff --git a/keyboards/viterbi/rules.mk b/keyboards/viterbi/rules.mk
index 8a1b94013e..1f77c63741 100644
--- a/keyboards/viterbi/rules.mk
+++ b/keyboards/viterbi/rules.mk
@@ -39,18 +39,15 @@ ARCH = AVR8
 #     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
 F_USB = $(F_CPU)
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 
-
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
diff --git a/keyboards/ymd96/config.h b/keyboards/ymd96/config.h
index cdc403d5e2..e0a2aa1383 100644
--- a/keyboards/ymd96/config.h
+++ b/keyboards/ymd96/config.h
@@ -35,7 +35,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_ANIMATIONS
 
 #define NO_UART 1
-#define BOOTLOADHID_BOOTLOADER 1
 
 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
diff --git a/keyboards/ymd96/rules.mk b/keyboards/ymd96/rules.mk
index 9e76993c4a..c7c12dcf17 100644
--- a/keyboards/ymd96/rules.mk
+++ b/keyboards/ymd96/rules.mk
@@ -24,6 +24,12 @@ NO_SUSPEND_POWER_DOWN = yes
 # processor frequency
 F_CPU = 12000000
 
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = atmel-dfu
+
 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -35,7 +41,6 @@ RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 
 OPT_DEFS = -DDEBUG_LEVEL=0
-OPT_DEFS += -DBOOTLOADER_SIZE=2048
 
 # custom matrix setup
 CUSTOM_MATRIX = yes
diff --git a/layouts/community/ergodox/jackhumbert/keymap.c b/layouts/community/ergodox/jackhumbert/keymap.c
index 6a00ffa293..634e4a0cee 100644
--- a/layouts/community/ergodox/jackhumbert/keymap.c
+++ b/layouts/community/ergodox/jackhumbert/keymap.c
@@ -19,7 +19,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
                                                               KC_HOME,
                                                KC_SPC,KC_SPC,KC_END,
         // right hand
-             KC_NO,     M(1),   KC_7,   KC_8,   KC_9,   KC_0,             KC_NO,
+             KC_NO,     M(1),   RESET,   KC_8,   KC_9,   KC_0,             KC_NO,
              KC_NO,     RGB_TOG,   RGB_MOD,   RGB_HUI,   RGB_HUD,   KC_P,             KC_BSPC,
                         RGB_SAI,   RGB_SAD,   RGB_VAI,   RGB_VAD,   KC_SCLN,          KC_QUOT,
              KC_NO,     KC_N,   KC_M,   KC_COMM,KC_DOT, KC_SLSH,          KC_ENT,
diff --git a/message.mk b/message.mk
index 0548fe174c..7c832b2927 100644
--- a/message.mk
+++ b/message.mk
@@ -43,9 +43,9 @@ MSG_SIZE_BEFORE = Size before:
 MSG_SIZE_AFTER = Size after:
 MSG_COFF = Converting to AVR COFF:
 MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
-MSG_FLASH = Creating load file for Flash:
+MSG_FLASH = Creating load file for flashing:
 MSG_EEPROM = Creating load file for EEPROM:
-MSG_BIN = Creating binary load file for Flash:
+MSG_BIN = Creating binary load file for flashing:
 MSG_EXTENDED_LISTING = Creating Extended Listing:
 MSG_SYMBOL_TABLE = Creating Symbol Table:
 MSG_LINKING = Linking:
@@ -76,3 +76,7 @@ define GENERATE_MSG_MAKE_TEST
 endef
 MSG_MAKE_TEST = $(eval $(call GENERATE_MSG_MAKE_TEST))$(MSG_MAKE_TEST_ACTUAL)
 MSG_TEST = Testing $(BOLD)$(TEST_NAME)$(NO_COLOR)
+MSG_CHECK_FILESIZE = Checking file size of $(TARGET).hex
+MSG_FILE_TOO_BIG = $(ERROR_COLOR)Your file is too big!$(NO_COLOR) $(CURRENT_SIZE)/$(MAX_SIZE)\n
+MSG_FILE_TOO_SMALL = Your file is too small! $(CURRENT_SIZE)/$(MAX_SIZE)\n
+MSG_FILE_JUST_RIGHT = File size is fine - $(CURRENT_SIZE)/$(MAX_SIZE)\n
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 0992015966..9232cf4411 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -143,7 +143,8 @@ void reset_keyboard(void) {
 #else
   wait_ms(250);
 #endif
-#ifdef CATERINA_BOOTLOADER
+// this is also done later in bootloader.c - not sure if it's neccesary here
+#ifdef BOOTLOADER_CATERINA
   *(uint16_t *)0x0800 = 0x7777; // these two are a-star-specific
 #endif
   bootloader_jump();
diff --git a/tmk_core/avr.mk b/tmk_core/avr.mk
index 94e9a7bdbb..c083f6b72d 100644
--- a/tmk_core/avr.mk
+++ b/tmk_core/avr.mk
@@ -121,22 +121,22 @@ qmk: $(BUILD_DIR)/$(TARGET).hex
 	printf "@ $(TARGET).json\n@=info.json\n" | zipnote -w $(TARGET).qmk
 
 # Program the device.
-program: $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).eep
+program: $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).eep check-size
 	$(PROGRAM_CMD)
 
-teensy: $(BUILD_DIR)/$(TARGET).hex
+teensy: $(BUILD_DIR)/$(TARGET).hex check-size
 	$(TEENSY_LOADER_CLI) -mmcu=$(MCU) -w -v $(BUILD_DIR)/$(TARGET).hex
 	
 BATCHISP ?= batchisp 
 
-flip: $(BUILD_DIR)/$(TARGET).hex
+flip: $(BUILD_DIR)/$(TARGET).hex check-size
 	$(BATCHISP) -hardware usb -device $(MCU) -operation erase f
 	$(BATCHISP) -hardware usb -device $(MCU) -operation loadbuffer $(BUILD_DIR)/$(TARGET).hex program
 	$(BATCHISP) -hardware usb -device $(MCU) -operation start reset 0
 	
 DFU_PROGRAMMER ?= dfu-programmer
 
-dfu: $(BUILD_DIR)/$(TARGET).hex sizeafter
+dfu: $(BUILD_DIR)/$(TARGET).hex check-size
 	until $(DFU_PROGRAMMER) $(MCU) get bootloader-version; do\
 		echo "Error: Bootloader not found. Trying again in 5s." ;\
 		sleep 5 ;\
@@ -168,7 +168,7 @@ dfu-ee: $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).eep
 	fi
 	$(DFU_PROGRAMMER) $(MCU) reset
 
-avrdude: $(BUILD_DIR)/$(TARGET).hex
+avrdude: $(BUILD_DIR)/$(TARGET).hex check-size
 	if grep -q -s Microsoft /proc/version; then \
 		echo 'ERROR: AVR flashing cannot be automated within the Windows Subsystem for Linux (WSL) currently. Instead, take the .hex file generated and flash it using AVRDUDE, AVRDUDESS, or XLoader.'; \
 	else \
diff --git a/tmk_core/common/avr/bootloader.c b/tmk_core/common/avr/bootloader.c
index 34db8d0b0a..ee150817c3 100644
--- a/tmk_core/common/avr/bootloader.c
+++ b/tmk_core/common/avr/bootloader.c
@@ -6,6 +6,7 @@
 #include <avr/wdt.h>
 #include <util/delay.h>
 #include "bootloader.h"
+#include <avr/boot.h>
 
 #ifdef PROTOCOL_LUFA
 #include <LUFA/Drivers/USB/USB.h>
@@ -56,14 +57,17 @@
  *          |  Bootloader   | 512B                   |  Bootloader   | 1KB
  * 0x7FFF   +---------------+               0x1FFFF  +---------------+
  */
-#ifndef BOOTLOADER_SIZE
-#warning To use bootloader_jump() you need to define BOOTLOADER_SIZE in config.h.
-#define BOOTLOADER_SIZE     4096
-#endif
 
-#define FLASH_SIZE          (FLASHEND + 1L)
-#define BOOTLOADER_START    (FLASH_SIZE - BOOTLOADER_SIZE)
+#define FLASH_SIZE (FLASHEND + 1L)
+
+#if !defined(BOOTLOADER_SIZE)
+    uint16_t bootloader_start;
+#endif
 
+#define BOOT_SIZE_256  0b110
+#define BOOT_SIZE_512  0b100
+#define BOOT_SIZE_1024 0b010
+#define BOOT_SIZE_2048 0b000
 
 /*
  * Entering the Bootloader via Software
@@ -74,34 +78,62 @@ uint32_t reset_key  __attribute__ ((section (".noinit")));
 
 /* initialize MCU status by watchdog reset */
 void bootloader_jump(void) {
-    #ifndef CATERINA_BOOTLOADER
-
-        #ifdef PROTOCOL_LUFA
-            USB_Disable();
-            cli();
-            _delay_ms(2000);
-        #endif
-
-        #ifdef PROTOCOL_PJRC
-            cli();
-            UDCON = 1;
-            USBCON = (1<<FRZCLK);
-            UCSR1B = 0;
-            _delay_ms(5);
-        #endif
-
-        #ifdef BOOTLOADHID_BOOTLOADER
-            // force bootloadHID to stay in bootloader mode, so that it waits
-            // for a new firmware to be flashed
-            eeprom_write_byte((uint8_t *)1, 0x00);
-        #endif
 
-        // watchdog reset
-        reset_key = BOOTLOADER_RESET_KEY;
-        wdt_enable(WDTO_250MS);
-        for (;;);
+    #if !defined(BOOTLOADER_SIZE)
+        uint8_t high_fuse = boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS);
+
+        if (high_fuse & BOOT_SIZE_256) { 
+            bootloader_start = (FLASH_SIZE - 512) >> 1;
+        } else if (high_fuse & BOOT_SIZE_512) {
+            bootloader_start = (FLASH_SIZE - 1024) >> 1;
+        } else if (high_fuse & BOOT_SIZE_1024) {
+            bootloader_start = (FLASH_SIZE - 2048) >> 1;
+        } else {
+            bootloader_start = (FLASH_SIZE - 4096) >> 1;
+        }
+    #endif
 
-    #else
+    // Something like this might work, but it compiled larger than the block above
+    // bootloader_start = FLASH_SIZE - (256 << (~high_fuse & 0b110 >> 1));
+
+
+    #if defined(BOOTLOADER_HALFKAY)
+        //  http://www.pjrc.com/teensy/jump_to_bootloader.html
+        cli();
+        // disable watchdog, if enabled (it's not)
+        // disable all peripherals
+        // a shutdown call might make sense here
+        UDCON = 1;
+        USBCON = (1<<FRZCLK);  // disable USB
+        UCSR1B = 0;
+        _delay_ms(5);
+        #if defined(__AVR_AT90USB162__)                // Teensy 1.0
+            EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
+            TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
+            DDRB = 0; DDRC = 0; DDRD = 0;
+            PORTB = 0; PORTC = 0; PORTD = 0;
+            asm volatile("jmp 0x3E00");
+        #elif defined(__AVR_ATmega32U4__)              // Teensy 2.0
+            EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+            TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
+            DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
+            PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+            asm volatile("jmp 0x7E00");
+        #elif defined(__AVR_AT90USB646__)              // Teensy++ 1.0
+            EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+            TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+            DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+            PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+            asm volatile("jmp 0xFC00");
+        #elif defined(__AVR_AT90USB1286__)             // Teensy++ 2.0
+            EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+            TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+            DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+            PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+            asm volatile("jmp 0x1FC00");
+        #endif 
+
+    #elif defined(BOOTLOADER_CATERINA)
         // this block may be optional
         // TODO: figure it out
 
@@ -118,83 +150,65 @@ void bootloader_jump(void) {
 
         while(1) {} // wait for watchdog timer to trigger
 
+    #else // Assume remaining boards are DFU, even if the flag isn't set
+
+        #ifndef __AVR_ATmega32A__ // no USB - maybe BOOTLOADER_BOOTLOADHID instead though?
+            UDCON = 1;
+            USBCON = (1<<FRZCLK);  // disable USB
+            UCSR1B = 0;
+            _delay_ms(5); // 5 seems to work fine
+        #endif
+
+        #ifdef BOOTLOADER_BOOTLOADHID
+            // force bootloadHID to stay in bootloader mode, so that it waits
+            // for a new firmware to be flashed
+            eeprom_write_byte((uint8_t *)1, 0x00);
+        #endif
+
+        // watchdog reset
+        reset_key = BOOTLOADER_RESET_KEY;
+        wdt_enable(WDTO_250MS);
+        for (;;);
     #endif
+
 }
 
 #ifdef __AVR_ATmega32A__
-// MCUSR is actually called MCUCSR in ATmega32A
-#define MCUSR MCUCSR
+    // MCUSR is actually called MCUCSR in ATmega32A
+    #define MCUSR MCUCSR
 #endif
 
 /* this runs before main() */
 void bootloader_jump_after_watchdog_reset(void) __attribute__ ((used, naked, section (".init3")));
 void bootloader_jump_after_watchdog_reset(void)
 {
-    if ((MCUSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) {
-        reset_key = 0;
+    #ifndef BOOTLOADER_HALFKAY
+        if ((MCUSR & (1<<WDRF)) && reset_key == BOOTLOADER_RESET_KEY) {
+            reset_key = 0;
+
+            // My custom USBasploader requires this to come up.
+            MCUSR = 0;
 
-        // My custom USBasploader requires this to come up.
-        MCUSR = 0;
+            // Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog.
+            MCUSR &= ~(1<<WDRF);
+            wdt_disable();
 
-        // Seems like Teensy halfkay loader requires clearing WDRF and disabling watchdog.
-        MCUSR &= ~(1<<WDRF);
-        wdt_disable();
 
-        // This is compled into 'icall', address should be in word unit, not byte.
-        ((void (*)(void))(BOOTLOADER_START/2))();
-    }
+            // This is compled into 'icall', address should be in word unit, not byte.
+            #ifdef BOOTLOADER_SIZE
+                ((void (*)(void))( (FLASH_SIZE - BOOTLOADER_SIZE) >> 1))();
+            #else
+                asm("ijmp" :: "z" (bootloader_start));
+            #endif
+        }
+    #endif
 }
 
 
 #if 0
-/* Jumping To The Bootloader
- * http://www.pjrc.com/teensy/jump_to_bootloader.html
- *
- * This method doen't work when using LUFA. idk why.
- * - needs to initialize more regisers or interrupt setting?
- */
-void bootloader_jump(void) {
-#ifdef PROTOCOL_LUFA
-    USB_Disable();
-    cli();
-    _delay_ms(2000);
-#endif
-
-#ifdef PROTOCOL_PJRC
-    cli();
-    UDCON = 1;
-    USBCON = (1<<FRZCLK);
-    UCSR1B = 0;
-    _delay_ms(5);
-#endif
-
-    /*
-     * Initialize
-     */
-#if defined(__AVR_AT90USB162__)
-    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
-    TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
-    DDRB = 0; DDRC = 0; DDRD = 0;
-    PORTB = 0; PORTC = 0; PORTD = 0;
-#elif defined(__AVR_ATmega32U4__)
-    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
-    TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
-    DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
-    PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
-#elif defined(__AVR_AT90USB646__)
-    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
-    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
-    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
-    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
-#elif defined(__AVR_AT90USB1286__)
-    EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
-    TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
-    DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
-    PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
-#endif
-
     /*
-     * USBaspLoader
+     * USBaspLoader - I'm not sure if this is used at all in any projects
+     *                would love to support it if it is -Jack
      */
 #if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__)
     // This makes custom USBasploader come up.
diff --git a/tmk_core/common/avr/bootloader_size.c b/tmk_core/common/avr/bootloader_size.c
new file mode 100644
index 0000000000..0d8d534f84
--- /dev/null
+++ b/tmk_core/common/avr/bootloader_size.c
@@ -0,0 +1,20 @@
+// Copyright 2017 Jack Humbert
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <avr/io.h>
+#include <avr/boot.h>
+
+// this is not valid C - it's for computing the size available on the chip
+AVR_SIZE: FLASHEND + 1 - BOOTLOADER_SIZE
\ No newline at end of file
diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk
index 53e79ef47a..920a7f6add 100644
--- a/tmk_core/rules.mk
+++ b/tmk_core/rules.mk
@@ -216,6 +216,9 @@ MOVE_DEP = mv -f $(patsubst %.o,%.td,$@) $(patsubst %.o,%.d,$@)
 
 elf: $(BUILD_DIR)/$(TARGET).elf
 hex: $(BUILD_DIR)/$(TARGET).hex
+cphex: hex
+	$(SILENT) || printf "Copying $(TARGET).hex to qmk_firmware folder" | $(AWK_CMD)
+	$(COPY) $(BUILD_DIR)/$(TARGET).hex $(TARGET).hex && $(PRINT_OK)
 eep: $(BUILD_DIR)/$(TARGET).eep
 lss: $(BUILD_DIR)/$(TARGET).lss
 sym: $(BUILD_DIR)/$(TARGET).sym
@@ -223,19 +226,17 @@ LIBNAME=lib$(TARGET).a
 lib: $(LIBNAME)
 
 # Display size of file.
-HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
+HEXSIZE = $(SIZE) --target=$(FORMAT) $(BUILD_DIR)/$(TARGET).hex
 #ELFSIZE = $(SIZE) --mcu=$(MCU) --format=avr $(TARGET).elf
 ELFSIZE = $(SIZE) $(BUILD_DIR)/$(TARGET).elf
 
 sizebefore:
-	@if test -f $(TARGET).hex; then $(SECHO) $(MSG_SIZE_BEFORE); $(SILENT) || $(HEXSIZE); \
+	@if test -f $(BUILD_DIR)/$(TARGET).hex; then $(SECHO) $(MSG_SIZE_BEFORE); $(SILENT) || $(HEXSIZE); \
 	2>/dev/null; $(SECHO); fi
 
 sizeafter: $(BUILD_DIR)/$(TARGET).hex
-	@if test -f $(TARGET).hex; then $(SECHO); $(SECHO) $(MSG_SIZE_AFTER); $(SILENT) || $(HEXSIZE); \
+	@if test -f $(BUILD_DIR)/$(TARGET).hex; then $(SECHO); $(SECHO) $(MSG_SIZE_AFTER); $(SILENT) || $(HEXSIZE); \
 	2>/dev/null; $(SECHO); fi
-	# test file sizes eventually
-	# @if [[ $($(SIZE) --target=$(FORMAT) $(TARGET).hex | $(AWK) 'NR==2 {print "0x"$5}') -gt 0x200 ]]; then $(SECHO) "File is too big!"; fi
 
 # Display compiler version information.
 gccversion :
@@ -249,8 +250,6 @@ gccversion :
 	@if $(AUTOGEN); then \
 		$(SILENT) || printf "Copying $(TARGET).hex to keymaps/$(KEYMAP)/$(TARGET).hex\n"; \
 		$(COPY) $@ $(KEYMAP_PATH)/$(TARGET).hex; \
-	else \
-		$(COPY) $@ $(TARGET).hex; \
 	fi
 
 %.eep: %.elf
@@ -371,6 +370,14 @@ show_path:
 	@echo SRC=$(SRC)
 	@echo OBJ=$(OBJ)
 
+check-size:
+	$(eval MAX_SIZE=$(shell n=`avr-gcc -E -mmcu=$(MCU) $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | grep -oP "(?<=AVR_SIZE: ).+"`; echo $$(($$n)) || echo 0))
+	$(eval CURRENT_SIZE=$(shell if [ -f $(BUILD_DIR)/$(TARGET).hex ]; then $(SIZE) --target=$(FORMAT) $(BUILD_DIR)/$(TARGET).hex | $(AWK) 'NR==2 {print $$4}'; else printf 0; fi))
+	if [ $(MAX_SIZE) -gt 0 ] && [ $(CURRENT_SIZE) -gt 0 ]; then \
+		$(SILENT) || printf "$(MSG_CHECK_FILESIZE)" | $(AWK_CMD); \
+		if [ $(CURRENT_SIZE) -gt $(MAX_SIZE) ]; then $(PRINT_WARNING_PLAIN); $(SILENT) || printf " * $(MSG_FILE_TOO_BIG)" ; else $(PRINT_OK); $(SILENT) || printf " * $(MSG_FILE_JUST_RIGHT)";  fi \
+	fi
+
 # Create build directory
 $(shell mkdir -p $(BUILD_DIR) 2>/dev/null)
 
@@ -385,4 +392,4 @@ $(eval $(foreach OUTPUT,$(OUTPUTS),$(shell mkdir -p $(OUTPUT) 2>/dev/null)))
 .PHONY : all finish sizebefore sizeafter qmkversion \
 gccversion build elf hex eep lss sym coff extcoff \
 clean clean_list debug gdb-config show_path \
-program teensy dfu flip dfu-ee flip-ee dfu-start 
+program teensy dfu flip dfu-ee flip-ee dfu-start
\ No newline at end of file
diff --git a/users/drashna/drashna.c b/users/drashna/drashna.c
index 31f58a430c..1bf029163c 100644
--- a/users/drashna/drashna.c
+++ b/users/drashna/drashna.c
@@ -428,7 +428,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   case KC_MAKE:
     if (!record->event.pressed) {
       SEND_STRING("make " QMK_KEYBOARD ":" QMK_KEYMAP);
-#ifndef CATERINA_BOOTLOADER
+#ifndef BOOTLOADER_CATERINA
       SEND_STRING(":teensy ");
 #else
       SEND_STRING(" ");
diff --git a/users/drashna/template.c b/users/drashna/template.c
index 027c780e95..f377d64f7a 100644
--- a/users/drashna/template.c
+++ b/users/drashna/template.c
@@ -43,7 +43,7 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   case KC_MAKE:
     if (!record->event.pressed) {
       SEND_STRING("make " QMK_KEYBOARD ":" QMK_KEYMAP);
-#ifndef CATERINA_BOOTLOADER
+#ifndef BOOTLOADER_CATERINA
       SEND_STRING(":teensy ");
 #else
       SEND_STRING(" ");