diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e8dc37..15ca6c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,4 +9,6 @@ add_subdirectory(submodules/wch-ch56x-lib)
 
 add_subdirectory(hydradancer)
 
-
+if (DEFINED BUILD_LEGACY)
+add_subdirectory(legacy)
+endif()
diff --git a/README.md b/README.md
index 3220707..249bbe6 100644
--- a/README.md
+++ b/README.md
@@ -102,8 +102,8 @@ Previous results for Hydradancer used priming, which made it faster. The new ver
 
 There are two configurations for Hydradancer:
 
-* the dual-HydraUSB3 : you will need the firmware compiled from `hydradancer/firmware_control_board` and `hydradancer/firmware_emulation_board`.
 * the Hydradancer dongle : only the firmware from `hydradancer/firmware_hydradancer` is needed.
+* (unmaintained) the dual-HydraUSB3 : you will need the firmware compiled from `hydradancer/firmware_control_board` and `hydradancer/firmware_emulation_board`.
 
 To build and flash the firmware, see [the build tutorial](BUILD.md). If you don't want to build the firmwares yourself, you can skip the building part by using the [latest release](https://github.com/HydraDancer/hydradancer_fw/releases/latest).
 
@@ -111,6 +111,8 @@ To build and flash the firmware, see [the build tutorial](BUILD.md). If you don'
 
 First, clone Facedancer. While we hope to merge the Hydradancer backend for Facedancer into the [main repository](https://github.com/greatscottgadgets/Facedancer) along with some bug fixes we may have found, the Hydradancer backend is currently in our fork.
 
+For the unmaintained dual-HydraUSB3 firmware, you will need v1.0.0 of our Facedancer fork.
+
 ```shell
 git clone https://github.com/HydraDancer/Facedancer
 ```
diff --git a/hydradancer/CMakeLists.txt b/hydradancer/CMakeLists.txt
index aa87e97..c4a95d8 100644
--- a/hydradancer/CMakeLists.txt
+++ b/hydradancer/CMakeLists.txt
@@ -1,6 +1,3 @@
-
-add_subdirectory(firmware_control_board)
-add_subdirectory(firmware_emulation_board)
 add_subdirectory(firmware_hydradancer)
 
 if (DEFINED BUILD_TESTS)
diff --git a/legacy/CMakeLists.txt b/legacy/CMakeLists.txt
new file mode 100644
index 0000000..734bbf4
--- /dev/null
+++ b/legacy/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_subdirectory(firmware_control_board)
+add_subdirectory(firmware_emulation_board)
diff --git a/hydradancer/firmware_control_board/.gitignore b/legacy/firmware_control_board/.gitignore
similarity index 100%
rename from hydradancer/firmware_control_board/.gitignore
rename to legacy/firmware_control_board/.gitignore
diff --git a/hydradancer/firmware_control_board/.ld b/legacy/firmware_control_board/.ld
similarity index 100%
rename from hydradancer/firmware_control_board/.ld
rename to legacy/firmware_control_board/.ld
diff --git a/hydradancer/firmware_control_board/CMakeLists.txt b/legacy/firmware_control_board/CMakeLists.txt
similarity index 100%
rename from hydradancer/firmware_control_board/CMakeLists.txt
rename to legacy/firmware_control_board/CMakeLists.txt
diff --git a/hydradancer/firmware_control_board/User/definitions.h b/legacy/firmware_control_board/User/definitions.h
similarity index 100%
rename from hydradancer/firmware_control_board/User/definitions.h
rename to legacy/firmware_control_board/User/definitions.h
diff --git a/hydradancer/firmware_control_board/User/main.c b/legacy/firmware_control_board/User/main.c
similarity index 100%
rename from hydradancer/firmware_control_board/User/main.c
rename to legacy/firmware_control_board/User/main.c
diff --git a/hydradancer/firmware_control_board/User/usb2_device_descriptors.h b/legacy/firmware_control_board/User/usb2_device_descriptors.h
similarity index 100%
rename from hydradancer/firmware_control_board/User/usb2_device_descriptors.h
rename to legacy/firmware_control_board/User/usb2_device_descriptors.h
diff --git a/hydradancer/firmware_control_board/User/usb3_device_descriptors.h b/legacy/firmware_control_board/User/usb3_device_descriptors.h
similarity index 100%
rename from hydradancer/firmware_control_board/User/usb3_device_descriptors.h
rename to legacy/firmware_control_board/User/usb3_device_descriptors.h
diff --git a/hydradancer/firmware_control_board/User/usb_device.h b/legacy/firmware_control_board/User/usb_device.h
similarity index 100%
rename from hydradancer/firmware_control_board/User/usb_device.h
rename to legacy/firmware_control_board/User/usb_device.h
diff --git a/hydradancer/firmware_control_board/User/usb_handlers.h b/legacy/firmware_control_board/User/usb_handlers.h
similarity index 100%
rename from hydradancer/firmware_control_board/User/usb_handlers.h
rename to legacy/firmware_control_board/User/usb_handlers.h
diff --git a/hydradancer/firmware_control_board/format.sh b/legacy/firmware_control_board/format.sh
similarity index 100%
rename from hydradancer/firmware_control_board/format.sh
rename to legacy/firmware_control_board/format.sh
diff --git a/hydradancer/firmware_emulation_board/.gitignore b/legacy/firmware_emulation_board/.gitignore
similarity index 100%
rename from hydradancer/firmware_emulation_board/.gitignore
rename to legacy/firmware_emulation_board/.gitignore
diff --git a/hydradancer/firmware_emulation_board/.ld b/legacy/firmware_emulation_board/.ld
similarity index 100%
rename from hydradancer/firmware_emulation_board/.ld
rename to legacy/firmware_emulation_board/.ld
diff --git a/hydradancer/firmware_emulation_board/CMakeLists.txt b/legacy/firmware_emulation_board/CMakeLists.txt
similarity index 100%
rename from hydradancer/firmware_emulation_board/CMakeLists.txt
rename to legacy/firmware_emulation_board/CMakeLists.txt
diff --git a/hydradancer/firmware_emulation_board/User/definitions.h b/legacy/firmware_emulation_board/User/definitions.h
similarity index 100%
rename from hydradancer/firmware_emulation_board/User/definitions.h
rename to legacy/firmware_emulation_board/User/definitions.h
diff --git a/hydradancer/firmware_emulation_board/User/main.c b/legacy/firmware_emulation_board/User/main.c
similarity index 100%
rename from hydradancer/firmware_emulation_board/User/main.c
rename to legacy/firmware_emulation_board/User/main.c
diff --git a/hydradancer/firmware_emulation_board/User/usb_device.h b/legacy/firmware_emulation_board/User/usb_device.h
similarity index 100%
rename from hydradancer/firmware_emulation_board/User/usb_device.h
rename to legacy/firmware_emulation_board/User/usb_device.h
diff --git a/hydradancer/firmware_emulation_board/User/usb_handlers.h b/legacy/firmware_emulation_board/User/usb_handlers.h
similarity index 100%
rename from hydradancer/firmware_emulation_board/User/usb_handlers.h
rename to legacy/firmware_emulation_board/User/usb_handlers.h
diff --git a/hydradancer/firmware_emulation_board/format.sh b/legacy/firmware_emulation_board/format.sh
similarity index 100%
rename from hydradancer/firmware_emulation_board/format.sh
rename to legacy/firmware_emulation_board/format.sh