diff --git a/platform/samd11/linker/samd11d14_bl.ld b/platform/samd11/linker/samd11d14_bl_2k.ld
similarity index 95%
rename from platform/samd11/linker/samd11d14_bl.ld
rename to platform/samd11/linker/samd11d14_bl_2k.ld
index a653082..41cd566 100644
--- a/platform/samd11/linker/samd11d14_bl.ld
+++ b/platform/samd11/linker/samd11d14_bl_2k.ld
@@ -28,8 +28,8 @@
 
 MEMORY
 {
-  flash (rx) : ORIGIN = 0x00001000, LENGTH = 0x3000
-  ram  (rwx) : ORIGIN = 0x20000000, LENGTH = 0x1000
+  flash (rx) : ORIGIN = 0x00000800, LENGTH = 14K
+  ram  (rwx) : ORIGIN = 0x20000000, LENGTH = 4K
 }
 
 __top_flash = ORIGIN(flash) + LENGTH(flash);
diff --git a/platform/samd11/linker/samd11d14_bl_4k.ld b/platform/samd11/linker/samd11d14_bl_4k.ld
new file mode 100644
index 0000000..8b735cb
--- /dev/null
+++ b/platform/samd11/linker/samd11d14_bl_4k.ld
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2016-2017, Alex Taradov <alex@taradov.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+MEMORY
+{
+  flash (rx) : ORIGIN = 0x00001000, LENGTH = 12K
+  ram  (rwx) : ORIGIN = 0x20000000, LENGTH = 4K
+}
+
+__top_flash = ORIGIN(flash) + LENGTH(flash);
+__top_ram = ORIGIN(ram) + LENGTH(ram);
+
+ENTRY(irq_handler_reset)
+
+SECTIONS
+{
+  .text : ALIGN(4)
+  {
+    FILL(0xff)
+    KEEP(*(.vectors))
+    *(.text*)
+    *(.rodata)
+    *(.rodata.*)
+    . = ALIGN(4);
+  } > flash
+
+  . = ALIGN(4);
+  _etext = .;
+
+  .uninit_RESERVED : ALIGN(4)
+  {
+    KEEP(*(.bss.$RESERVED*))
+  } > ram
+
+  .data : ALIGN(4)
+  {
+    FILL(0xff)
+    _data = .;
+    *(.ramfunc .ramfunc.*);
+    *(vtable)
+    *(.data*)
+    . = ALIGN(4);
+    _edata = .;
+  } > ram AT > flash
+
+  .bss : ALIGN(4)
+  {
+    _bss = .;
+    *(.bss*)
+    *(COMMON)
+    . = ALIGN(4);
+    _ebss = .;
+    PROVIDE(_end = .);
+  } > ram
+
+  PROVIDE(_stack_top = __top_ram - 0);
+}
diff --git a/platform/samd11/make/Makefile_bl_2k b/platform/samd11/make/Makefile_bl_2k
new file mode 100644
index 0000000..df8ea9f
--- /dev/null
+++ b/platform/samd11/make/Makefile_bl_2k
@@ -0,0 +1,88 @@
+##############################################################################
+BUILD = build
+BIN = free_dap_d11_bl_2k
+
+##############################################################################
+.PHONY: all directory clean size dfu
+
+CC = arm-none-eabi-gcc
+OBJCOPY = arm-none-eabi-objcopy
+SIZE = arm-none-eabi-size
+
+ifeq ($(OS), Windows_NT)
+  MKDIR = gmkdir
+else
+  MKDIR = mkdir
+endif
+
+CFLAGS += -W -Wall --std=gnu11 -Os
+CFLAGS += -fno-diagnostics-show-caret
+CFLAGS += -fdata-sections -ffunction-sections
+CFLAGS += -funsigned-char -funsigned-bitfields
+CFLAGS += -mcpu=cortex-m0plus -mthumb
+CFLAGS += -MD -MP -MT $(BUILD)/$(*F).o -MF $(BUILD)/$(@F).d
+CFLAGS += -flto
+
+LDFLAGS += -mcpu=cortex-m0plus -mthumb
+LDFLAGS += -Wl,--gc-sections
+LDFLAGS += -Wl,--script=../linker/samd11d14_bl_2k.ld
+LDFLAGS += -flto
+
+INCLUDES += \
+  -I../include \
+  -I../../.. \
+  -I..
+
+SRCS += \
+  ../../../dap.c \
+  ../main.c \
+  ../udc.c \
+  ../usb.c \
+  ../usb_descriptors.c \
+  ../startup_samd11.c
+
+DEFINES += \
+  -D__SAMD11C14A__ \
+  -DDONT_USE_CMSIS_INIT \
+  -DF_CPU=48000000
+
+CFLAGS += $(INCLUDES) $(DEFINES)
+
+OBJS = $(addprefix $(BUILD)/, $(notdir %/$(subst .c,.o, $(SRCS))))
+
+all: directory $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin size
+
+$(BUILD)/$(BIN).elf: $(OBJS)
+	@echo LD $@
+	@$(CC) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
+
+$(BUILD)/$(BIN).hex: $(BUILD)/$(BIN).elf
+	@echo OBJCOPY $@
+	@$(OBJCOPY) -O ihex $^ $@
+
+$(BUILD)/$(BIN).bin: $(BUILD)/$(BIN).elf
+	@echo OBJCOPY $@
+	@$(OBJCOPY) -O binary $^ $@
+
+%.o:
+	@echo CC $@
+	@$(CC) $(CFLAGS) $(filter %/$(subst .o,.c,$(notdir $@)), $(SRCS)) -c -o $@
+
+directory:
+	@$(MKDIR) -p $(BUILD)
+
+size: $(BUILD)/$(BIN).elf
+	@echo size:
+	@$(SIZE) -t $^
+
+clean:
+	@echo clean
+	@-rm -rf $(BUILD)
+
+dfu: $(BUILD)/$(BIN).bin
+	@echo DFU $^
+	@cp $(BUILD)/$(BIN).bin $(BUILD)/$(BIN).dfu
+	@dfu-suffix -a $(BUILD)/$(BIN).dfu -v ffff -p ffff -d ffff
+
+-include $(wildcard $(BUILD)/*.d)
+
diff --git a/platform/samd11/make/Makefile_bl b/platform/samd11/make/Makefile_bl_4k
similarity index 95%
rename from platform/samd11/make/Makefile_bl
rename to platform/samd11/make/Makefile_bl_4k
index 23d5d22..3d666b6 100644
--- a/platform/samd11/make/Makefile_bl
+++ b/platform/samd11/make/Makefile_bl_4k
@@ -1,6 +1,6 @@
 ##############################################################################
 BUILD = build
-BIN = free_dap_d11_bl
+BIN = free_dap_d11_bl_4k
 
 ##############################################################################
 .PHONY: all directory clean size
@@ -25,7 +25,7 @@ CFLAGS += -flto
 
 LDFLAGS += -mcpu=cortex-m0plus -mthumb
 LDFLAGS += -Wl,--gc-sections
-LDFLAGS += -Wl,--script=../linker/samd11d14_bl.ld
+LDFLAGS += -Wl,--script=../linker/samd11d14_bl_4k.ld
 LDFLAGS += -flto
 
 INCLUDES += \