diff --git a/Makefile b/Makefile
index 0eb0db9..45ee728 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 MCU=atmega32u4
 F_CPU=16000000
 
+MODEL?=LEO
 LAYOUT?=qwerty
 
 USB=/dev/ttyACM0
@@ -25,7 +26,7 @@ $(LAYOUT).hex: $(LAYOUT).elf
 	avr-objcopy --output-target=ihex $(LAYOUT).elf $(LAYOUT).hex
 
 $(LAYOUT).s: $(LAYOUT).scm menelaus.scm keycodes.scm
-	microscheme -m LEO $(LAYOUT).scm
+	microscheme -m $(MODEL) $(LAYOUT).scm
 
 %.elf: %.s usb_keyboard.s
 	avr-gcc -mmcu=$(MCU) -o $(LAYOUT).elf $(LAYOUT).s usb_keyboard.s
diff --git a/keyboardio-dvorak.scm b/keyboardio-dvorak.scm
new file mode 100644
index 0000000..ab86066
--- /dev/null
+++ b/keyboardio-dvorak.scm
@@ -0,0 +1,78 @@
+;;; This is the soft dvorak Kebyoardio layout.
+
+;; It is written with the assumption that the host OS is set to dvorak mode, so
+;; it sends keycodes with the assumption that the OS will apply the dvorak
+;; mapping; for instance it sends [ as -, which the OS then turns back into [.
+
+;; Currently requires this branch of microscheme:
+;; https://github.com/ryansuchocki/microscheme/pull/36
+
+(include "keycodes.scm")
+
+;; What are the rows and columns we care about?
+(define rows (list 0 1 2 3))
+(define columns (list 0 1 2 3 4 5 6 7 8 9 10 11))
+
+;; Which GPIO pins are responsible for each row or column?
+;; These are the pins used by the Keyboardio Atreus.
+(define row-pins (vector 0 1 2 3))
+(define column-pins (vector 4 5 6 7 8 9 10 11 12 13 14 15))
+
+;; We have to declare this up front and set it later because of circularity.
+(define layers #f)
+(define current-layer #f)
+(define momentary-layer #f)
+
+(define (fn on?) (set! momentary-layer (and on? (vector-ref layers 1))))
+
+(define (set-layer n)
+  (lambda (_) (set! current-layer (vector-ref layers n))))
+
+;;;; Layers
+
+(define base-layer
+ (vector key-q key-w key-e key-r key-t 0
+         0 key-y key-u key-i key-o key-p
+
+         key-a key-s key-d key-f key-g 0
+         0 key-h key-j key-k key-l key-semicolon
+
+         key-z key-x key-c key-v key-b key-backtick
+         key-backslash key-n key-m key-comma key-period key-slash
+
+         key-esc key-tab mod-super mod-shift key-backspace mod-ctrl
+         mod-alt key-space fn key-quote key-left-bracket key-enter))
+
+(define fn-layer
+  (vector (sft key-1) (sft key-2) key-up (sft key-4) (sft key-5) 0
+          0 key-page-up key-7 key-8 key-9 key-backspace
+
+          (sft key-9) key-left key-down key-right (sft key-0) 0
+          0 key-page-down key-4 key-5 key-6 0
+
+          key-dash key-equal (sft key-3) (sft key-dash) (sft key-equal) (sft key-6)
+          (sft key-7) (sft key-8) key-1 key-2 key-3 (sft key-right-bracket)
+
+          ;; set-layer 2 takes us to l2-layer below; doesn't need to be held
+          (set-layer 2) key-insert mod-super mod-shift key-backspace mod-ctrl
+          mod-alt key-space fn key-e key-0 key-right-bracket))
+
+(define l2-layer
+  (vector key-insert key-home key-up key-end key-page-up 0
+          0 key-up key-f7 key-f8 key-f9 key-f10
+
+          key-delete key-left key-down key-right key-page-down 0
+          0 key-down key-f4 key-f5 key-f6 key-f11
+
+          ;; the B key enters the bootloader
+          0 key-vol-up 0 0 reset 0
+          0 0 key-f1 key-f2 key-f3 key-f12
+
+          (set-layer 0) key-vol-down mod-super mod-shift key-backspace mod-ctrl
+          ;; tapping the fn key brings us back to the base layer
+          0 0 (set-layer 0) key-printscreen key-scroll-lock key-pause))
+
+(set! layers (vector base-layer fn-layer l2-layer))
+(set! current-layer (vector-ref layers 0))
+
+(include "menelaus.scm")