diff --git a/corne.c b/corne.c
new file mode 100644
index 0000000..f0d13d6
--- /dev/null
+++ b/corne.c
@@ -0,0 +1,278 @@
+/* Copyright 2022 splitkb.com <support@splitkb.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/>.
+ */
+
+#include "quantum.h"
+
+// The first four layers gets a name for readability, which is then used in the OLED below.
+enum layers {
+  _DEFAULT,
+  _LOWER,
+  _RAISE,
+  _ADJUST
+};
+
+#ifdef OLED_ENABLE
+// NOTE: Most of the OLED code was originally written by Soundmonster for the Corne,
+// and has been copied directly from `crkbd/soundmonster/keymap.c`
+
+oled_rotation_t oled_init_kb(oled_rotation_t rotation) {
+    return OLED_ROTATION_270;
+}
+
+static void render_space(void) {
+    oled_write_P(PSTR("     "), false);
+}
+
+static void render_mod_status_gui_alt(uint8_t modifiers) {
+    static const char PROGMEM gui_off_1[] = {0x85, 0x86, 0};
+    static const char PROGMEM gui_off_2[] = {0xa5, 0xa6, 0};
+    static const char PROGMEM gui_on_1[] = {0x8d, 0x8e, 0};
+    static const char PROGMEM gui_on_2[] = {0xad, 0xae, 0};
+
+    static const char PROGMEM alt_off_1[] = {0x87, 0x88, 0};
+    static const char PROGMEM alt_off_2[] = {0xa7, 0xa8, 0};
+    static const char PROGMEM alt_on_1[] = {0x8f, 0x90, 0};
+    static const char PROGMEM alt_on_2[] = {0xaf, 0xb0, 0};
+
+    // fillers between the modifier icons bleed into the icon frames
+    static const char PROGMEM off_off_1[] = {0xc5, 0};
+    static const char PROGMEM off_off_2[] = {0xc6, 0};
+    static const char PROGMEM on_off_1[] = {0xc7, 0};
+    static const char PROGMEM on_off_2[] = {0xc8, 0};
+    static const char PROGMEM off_on_1[] = {0xc9, 0};
+    static const char PROGMEM off_on_2[] = {0xca, 0};
+    static const char PROGMEM on_on_1[] = {0xcb, 0};
+    static const char PROGMEM on_on_2[] = {0xcc, 0};
+
+    if(modifiers & MOD_MASK_GUI) {
+        oled_write_P(gui_on_1, false);
+    } else {
+        oled_write_P(gui_off_1, false);
+    }
+
+    if ((modifiers & MOD_MASK_GUI) && (modifiers & MOD_MASK_ALT)) {
+        oled_write_P(on_on_1, false);
+    } else if(modifiers & MOD_MASK_GUI) {
+        oled_write_P(on_off_1, false);
+    } else if(modifiers & MOD_MASK_ALT) {
+        oled_write_P(off_on_1, false);
+    } else {
+        oled_write_P(off_off_1, false);
+    }
+
+    if(modifiers & MOD_MASK_ALT) {
+        oled_write_P(alt_on_1, false);
+    } else {
+        oled_write_P(alt_off_1, false);
+    }
+
+    if(modifiers & MOD_MASK_GUI) {
+        oled_write_P(gui_on_2, false);
+    } else {
+        oled_write_P(gui_off_2, false);
+    }
+
+    if ((modifiers & MOD_MASK_GUI) && (modifiers & MOD_MASK_ALT)) {
+        oled_write_P(on_on_2, false);
+    } else if(modifiers & MOD_MASK_GUI) {
+        oled_write_P(on_off_2, false);
+    } else if(modifiers & MOD_MASK_ALT) {
+        oled_write_P(off_on_2, false);
+    } else {
+        oled_write_P(off_off_2, false);
+    }
+
+    if(modifiers & MOD_MASK_ALT) {
+        oled_write_P(alt_on_2, false);
+    } else {
+        oled_write_P(alt_off_2, false);
+    }
+}
+
+static void render_mod_status_ctrl_shift(uint8_t modifiers) {
+    static const char PROGMEM ctrl_off_1[] = {0x89, 0x8a, 0};
+    static const char PROGMEM ctrl_off_2[] = {0xa9, 0xaa, 0};
+    static const char PROGMEM ctrl_on_1[] = {0x91, 0x92, 0};
+    static const char PROGMEM ctrl_on_2[] = {0xb1, 0xb2, 0};
+
+    static const char PROGMEM shift_off_1[] = {0x8b, 0x8c, 0};
+    static const char PROGMEM shift_off_2[] = {0xab, 0xac, 0};
+    static const char PROGMEM shift_on_1[] = {0xcd, 0xce, 0};
+    static const char PROGMEM shift_on_2[] = {0xcf, 0xd0, 0};
+
+    // fillers between the modifier icons bleed into the icon frames
+    static const char PROGMEM off_off_1[] = {0xc5, 0};
+    static const char PROGMEM off_off_2[] = {0xc6, 0};
+    static const char PROGMEM on_off_1[] = {0xc7, 0};
+    static const char PROGMEM on_off_2[] = {0xc8, 0};
+    static const char PROGMEM off_on_1[] = {0xc9, 0};
+    static const char PROGMEM off_on_2[] = {0xca, 0};
+    static const char PROGMEM on_on_1[] = {0xcb, 0};
+    static const char PROGMEM on_on_2[] = {0xcc, 0};
+
+    if(modifiers & MOD_MASK_CTRL) {
+        oled_write_P(ctrl_on_1, false);
+    } else {
+        oled_write_P(ctrl_off_1, false);
+    }
+
+    if ((modifiers & MOD_MASK_CTRL) && (modifiers & MOD_MASK_SHIFT)) {
+        oled_write_P(on_on_1, false);
+    } else if(modifiers & MOD_MASK_CTRL) {
+        oled_write_P(on_off_1, false);
+    } else if(modifiers & MOD_MASK_SHIFT) {
+        oled_write_P(off_on_1, false);
+    } else {
+        oled_write_P(off_off_1, false);
+    }
+
+    if(modifiers & MOD_MASK_SHIFT) {
+        oled_write_P(shift_on_1, false);
+    } else {
+        oled_write_P(shift_off_1, false);
+    }
+
+    if(modifiers & MOD_MASK_CTRL) {
+        oled_write_P(ctrl_on_2, false);
+    } else {
+        oled_write_P(ctrl_off_2, false);
+    }
+
+    if ((modifiers & MOD_MASK_CTRL) && (modifiers & MOD_MASK_SHIFT)) {
+        oled_write_P(on_on_2, false);
+    } else if(modifiers & MOD_MASK_CTRL) {
+        oled_write_P(on_off_2, false);
+    } else if(modifiers & MOD_MASK_SHIFT) {
+        oled_write_P(off_on_2, false);
+    } else {
+        oled_write_P(off_off_2, false);
+    }
+
+    if(modifiers & MOD_MASK_SHIFT) {
+        oled_write_P(shift_on_2, false);
+    } else {
+        oled_write_P(shift_off_2, false);
+    }
+}
+
+static void render_logo(void) {
+    static const char PROGMEM aurora_logo[] = {
+        255,255,255,255,255,207,131,  3,131,  3,135,199,199,199,199,199,207,143, 15,207,143,199, 71, 71,  7, 15,255,255,255,255,255,255,255,127,127, 31, 15,159,192,204,239, 95, 95, 95, 95,103, 87,223,223,223,255,255,157,153,152,128,130, 15, 15,127,127,255,255,255,255,255,248,248,194,195,143,159,159, 60,120,120,112,208,216,248,127,127, 63,191,191, 63,159,143,211,130,244,251,255,255,255,255,255,255,255,255,255,255,255,255,255, 15,  1,128,252,254,254,254,254,222,215, 83, 83, 64,128,  3, 31,255,255,255,255,255,255,255,
+    };
+    oled_write_raw_P(aurora_logo, sizeof(aurora_logo));
+    oled_set_cursor(0, 4);
+}
+
+static void render_logo_text(void) {
+    oled_write_P(PSTR("Leo.J"), false);
+}
+
+static void render_kb_LED_state(void) {
+    // Host Keyboard LED Status
+    led_t led_usb_state = host_keyboard_led_state();
+    oled_write_P(led_usb_state.num_lock ? PSTR("N ") : PSTR("  "), false);
+    oled_write_P(led_usb_state.caps_lock ? PSTR("C ") : PSTR("  "), false);
+    oled_write_P(led_usb_state.scroll_lock ? PSTR("S ") : PSTR("  "), false);
+}
+
+static void render_layer_state(void) {
+    static const char PROGMEM default_layer[] = {
+        0x20, 0x94, 0x95, 0x96, 0x20,
+        0x20, 0xb4, 0xb5, 0xb6, 0x20,
+        0x20, 0xd4, 0xd5, 0xd6, 0x20, 0};
+    static const char PROGMEM raise_layer[] = {
+        0x20, 0x97, 0x98, 0x99, 0x20,
+        0x20, 0xb7, 0xb8, 0xb9, 0x20,
+        0x20, 0xd7, 0xd8, 0xd9, 0x20, 0};
+    static const char PROGMEM lower_layer[] = {
+        0x20, 0x9a, 0x9b, 0x9c, 0x20,
+        0x20, 0xba, 0xbb, 0xbc, 0x20,
+        0x20, 0xda, 0xdb, 0xdc, 0x20, 0};
+    static const char PROGMEM adjust_layer[] = {
+        0x20, 0x9d, 0x9e, 0x9f, 0x20,
+        0x20, 0xbd, 0xbe, 0xbf, 0x20,
+        0x20, 0xdd, 0xde, 0xdf, 0x20, 0};
+
+    switch (get_highest_layer(layer_state | default_layer_state)) {
+        case _LOWER:
+            oled_write_P(lower_layer, false);
+            break;
+        case _RAISE:
+            oled_write_P(raise_layer, false);
+            break;
+        case _ADJUST:
+            oled_write_P(adjust_layer, false);
+            break;
+        default:
+            oled_write_P(default_layer, false);
+    }
+}
+
+
+bool oled_task_kb(void) {
+    if (!oled_task_user()) {
+        return false;
+    }
+    if (is_keyboard_master()) {
+        // Renders the current keyboard state (layers and mods)
+        render_logo();
+        render_logo_text();
+        render_space();
+        render_layer_state();
+        render_space();
+        render_mod_status_gui_alt(get_mods()|get_oneshot_mods());
+        render_mod_status_ctrl_shift(get_mods()|get_oneshot_mods());
+        render_kb_LED_state();
+    } else {
+        // clang-format off
+        static const char PROGMEM aurora_art[] = {
+        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,240,240,240, 96,224, 96, 96, 96,112, 96, 96,224,224,  0,  0,  0,  0,  0,  0,  0,  0,
+        0,  0,  0,  0,  0,  0,  0,160,224,240, 48, 31, 27, 27,  0,  1,128,248,192,224,248,128,  0, 37,124,224,224,192,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  3,  3, 13, 12,240,240, 80,144, 33, 35, 35, 35,225, 16,  0, 12,  7, 13,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,248,159,243,243,243,255, 18,  0,  0,  6, 31,254,240,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,255, 72,255,255,191, 63,  0,  0,  0,  0,  0,255,255,224,  0,  0,  0,  0,  0,  0,  0,
+        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,128,255,214,247,255,255,254,  0,  0,  0,  0,  0,255,255,255,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 31, 45, 41, 97,192,224,255,237,255,255,  0,  0,  0,  0,  0, 15,255,  7,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,192,255,251,169,173, 45, 47, 60, 48,240,208,208,220, 95,254,  0,  0,  0,  0,  0,  0,  0,  0, 28, 30,215,255,255,255,251,255,255,191,247,230, 99, 67, 67, 67, 67, 67, 83, 99,119,127,127, 99, 98, 99, 62, 28, 28, 28,  0,
+        0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+            };
+        // clang-format on
+        oled_write_raw_P(aurora_art, sizeof(aurora_art));
+    }
+    return false;
+}
+#endif
+
+#ifdef ENCODER_ENABLE
+bool encoder_update_kb(uint8_t index, bool clockwise) {
+    if (!encoder_update_user(index, clockwise)) {
+        return false;
+    }
+    // 0 is left-half encoder,
+    // 1 is right-half encoder
+    if (index == 0) {
+        // Volume control
+        if (clockwise) {
+            tap_code(KC_VOLU);
+        } else {
+            tap_code(KC_VOLD);
+        }
+    } else if (index == 1) {
+        // Page up/Page down
+        if (clockwise) {
+            tap_code(KC_PGDN);
+        } else {
+            tap_code(KC_PGUP);
+        }
+    }
+    return true;
+}
+#endif