Inital port of xd84 (#5164)

* Inital port of xd84

* Inital port of xd84 - review comments

13 files changed, 1002 insertions, 0 deletions

diff --git a/keyboards/xd84/config.h b/keyboards/xd84/config.h
new file mode 100644
index 0000000000..b2f850c184
--- /dev/null
+++ b/keyboards/xd84/config.h
@@ -0,0 +1,241 @@
+/* Copyright 2019
+ *
+ * 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/>.
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x4084
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    KPrepublic
+#define PRODUCT         XD84
+#define DESCRIPTION     KPrepublic XD84
+
+/* key matrix size */
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 15
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+*/
+//#define MATRIX_ROW_PINS { D0, D5 }
+//#define MATRIX_COL_PINS { F1, F0, B0 }
+//#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+//#define DIODE_DIRECTION COL2ROW
+
+// TODO: NOT WORKING - original kimera code seems to suggest B6 or C7 in backlight.c
+//                     however tracing seems to suggest this is not true (as C7 is RGB)
+#define BACKLIGHT_PIN B5
+#define BACKLIGHT_LEVELS 3
+// #define BACKLIGHT_BREATHING
+
+#define RGB_DI_PIN C7
+#define RGBLED_NUM 7
+#define RGBLIGHT_ANIMATIONS
+// #ifdef RGB_DI_PIN
+//   #define RGBLIGHT_HUE_STEP 8
+//   #define RGBLIGHT_SAT_STEP 8
+//   #define RGBLIGHT_VAL_STEP 8
+//   #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//   #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+// /*== all animations enable ==*/
+//   #define RGBLIGHT_ANIMATIONS
+// /*== or choose animations ==*/
+//   #define RGBLIGHT_EFFECT_BREATHING
+//   #define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//   #define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//   #define RGBLIGHT_EFFECT_SNAKE
+//   #define RGBLIGHT_EFFECT_KNIGHT
+//   #define RGBLIGHT_EFFECT_CHRISTMAS
+//   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//   #define RGBLIGHT_EFFECT_RGB_TEST
+//   #define RGBLIGHT_EFFECT_ALTERNATING
+// #endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCING_DELAY 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* number of backlight levels */
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ *
+ */
+
+/* key combination for magic key command */
+/* defined by default; to change, uncomment and set to the combination you want */
+// #define IS_COMMAND() (get_mods() == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
+
+/* control how magic key switches layers */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM false
+
+/* override magic key keymap */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM
+//#define MAGIC_KEY_HELP1          H
+//#define MAGIC_KEY_HELP2          SLASH
+//#define MAGIC_KEY_DEBUG          D
+//#define MAGIC_KEY_DEBUG_MATRIX   X
+//#define MAGIC_KEY_DEBUG_KBD      K
+//#define MAGIC_KEY_DEBUG_MOUSE    M
+//#define MAGIC_KEY_VERSION        V
+//#define MAGIC_KEY_STATUS         S
+//#define MAGIC_KEY_CONSOLE        C
+//#define MAGIC_KEY_LAYER0_ALT1    ESC
+//#define MAGIC_KEY_LAYER0_ALT2    GRAVE
+//#define MAGIC_KEY_LAYER0         0
+//#define MAGIC_KEY_LAYER1         1
+//#define MAGIC_KEY_LAYER2         2
+//#define MAGIC_KEY_LAYER3         3
+//#define MAGIC_KEY_LAYER4         4
+//#define MAGIC_KEY_LAYER5         5
+//#define MAGIC_KEY_LAYER6         6
+//#define MAGIC_KEY_LAYER7         7
+//#define MAGIC_KEY_LAYER8         8
+//#define MAGIC_KEY_LAYER9         9
+//#define MAGIC_KEY_BOOTLOADER     PAUSE
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_NKRO           N
+//#define MAGIC_KEY_SLEEP_LED      Z
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1
+
+/*
+ * HD44780 LCD Display Configuration
+ */
+/*
+#define LCD_LINES           2     //< number of visible lines of the display
+#define LCD_DISP_LENGTH    16     //< visibles characters per line of the display
+
+#define LCD_IO_MODE      1            //< 0: memory mapped mode, 1: IO port mode
+
+#if LCD_IO_MODE
+#define LCD_PORT         PORTB        //< port for the LCD lines
+#define LCD_DATA0_PORT   LCD_PORT     //< port for 4bit data bit 0
+#define LCD_DATA1_PORT   LCD_PORT     //< port for 4bit data bit 1
+#define LCD_DATA2_PORT   LCD_PORT     //< port for 4bit data bit 2
+#define LCD_DATA3_PORT   LCD_PORT     //< port for 4bit data bit 3
+#define LCD_DATA0_PIN    4            //< pin for 4bit data bit 0
+#define LCD_DATA1_PIN    5            //< pin for 4bit data bit 1
+#define LCD_DATA2_PIN    6            //< pin for 4bit data bit 2
+#define LCD_DATA3_PIN    7            //< pin for 4bit data bit 3
+#define LCD_RS_PORT      LCD_PORT     //< port for RS line
+#define LCD_RS_PIN       3            //< pin  for RS line
+#define LCD_RW_PORT      LCD_PORT     //< port for RW line
+#define LCD_RW_PIN       2            //< pin  for RW line
+#define LCD_E_PORT       LCD_PORT     //< port for Enable line
+#define LCD_E_PIN        1            //< pin  for Enable line
+#endif
+*/
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/xd84/custom_matrix_helper.c b/keyboards/xd84/custom_matrix_helper.c
new file mode 100644
index 0000000000..a6a0a041d9
--- /dev/null
+++ b/keyboards/xd84/custom_matrix_helper.c
@@ -0,0 +1,112 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "debounce.h"
+#include "quantum.h"
+
+//_____COMMON__________________________________________________________________
+// user-defined overridable functions
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+__attribute__((weak)) void matrix_init_user(void) {}
+__attribute__((weak)) void matrix_scan_user(void) {}
+
+
+//_____COULD BE COMMON_________________________________________________________
+/* matrix state(1:on, 0:off) */
+/*static*/ matrix_row_t raw_matrix[MATRIX_ROWS];
+/*static*/ matrix_row_t matrix[MATRIX_ROWS];
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header()  print("\nr/c 01234567\n")
+#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop(matrix[i])
+#    define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse16(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop16(matrix[i])
+#    define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse32(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop32(matrix[i])
+#    define ROW_SHIFTER  ((uint32_t)1)
+#endif
+
+__attribute__ ((weak))
+uint8_t matrix_rows(void) {
+  return MATRIX_ROWS;
+}
+
+__attribute__ ((weak))
+uint8_t matrix_cols(void) {
+  return MATRIX_COLS;
+}
+
+__attribute__ ((weak))
+matrix_row_t matrix_get_row(uint8_t row) {
+  return matrix[row];
+}
+
+__attribute__ ((weak))
+uint8_t matrix_key_count(void) {
+  uint8_t count = 0;
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    count += matrix_bitpop(i);
+  }
+  return count;
+}
+
+__attribute__ ((weak))
+void matrix_print(void) {
+  print_matrix_header();
+
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    phex(row); print(": ");
+    print_matrix_row(row);
+    print("\n");
+  }
+}
+
+
+//_____CUSTOM MATRIX 'LITE'____________________________________________________
+__attribute__ ((weak))
+void custom_matrix_init(void) {
+}
+
+__attribute__ ((weak))
+bool custom_matrix_scan(matrix_row_t current_matrix[]) {
+    bool changed = true;
+    return changed;
+}
+
+__attribute__ ((weak))
+void matrix_init(void) {
+
+  custom_matrix_init();
+
+  // initialize matrix state: all keys off
+  for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+    raw_matrix[i] = 0;
+    matrix[i] = 0;
+  }
+
+  debounce_init(MATRIX_ROWS);
+
+  matrix_init_quantum();
+}
+
+__attribute__ ((weak))
+uint8_t matrix_scan(void) {
+  bool changed = custom_matrix_scan(raw_matrix);
+
+  debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+  matrix_scan_quantum();
+  return 1;
+}
diff --git a/keyboards/xd84/dev.md b/keyboards/xd84/dev.md
new file mode 100644
index 0000000000..453edb3667
--- /dev/null
+++ b/keyboards/xd84/dev.md
@@ -0,0 +1,132 @@
+# XD84
+
+Development docs covering the following:
+- Kimera core
+- RGB
+- Backlight
+
+## Kimera core
+![Kimera core](https://gd2.alicdn.com/imgextra/i4/159916802/TB2qsIgdrJkpuFjy1zcXXa5FFXa_!!159916802.jpg)
+
+What little available info that was available for the qmk port
+- atmega32u4 16Mhz
+  - board seems to have a 6Mhz crystal 
+- 2x PCA9555 I2C IO expander
+
+Links:
+- [Schematic, BOM, Gerbers](/kairyu/kimera/blob/master/kimera_core)
+- [Original firmware](https://github.com/kairyu/tmk_keyboard_custom/tree/master/keyboard/kimera)
+
+```c
+/*
+Kimera_core_v1.0 Components
+
+             U1 (atmega32u4)
+           ,----------------.
+      TX --| TX0(PD3)   RAW |--
+      RX --| RX1(PD2)   GND |--
+         --| GND      RESET |-- RST
+         --| GND        VCC |--
+     SDA --| 2(PD1) (PF4)A3 |--
+     SCL --| 3(PD0) (PF5)A2 |--
+   (INT) --| 4(PD4) (PF6)A1 |--
+         --| 5(PC6) (PF7)A0 |--
+         --| 6(PD7) (PB1)15 |-- SCK
+    LED2 --| 7(PE6) (PB3)14 |-- MISO
+    LED1 --| 8(PB4) (PB2)16 |-- MOSI
+    LED3 --| 9(PB5) (PB6)10 |-- LED4
+          `----------------'
+
+         IC1 (PCA9555)                  IC2 (PCA9555)
+         ,----------.                   ,----------.
+   SDA --| SDA  P00 |-- P1        SDA --| SDA  P00 |-- P17
+   SCL --| SCL  P01 |-- P2        SCL --| SCL  P01 |-- P18
+   INT --| INT  P02 |-- P3        INT --| INT  P02 |-- P19
+         |      P03 |-- P4              |      P03 |-- P20
+   GND --| A0   P04 |-- P5        VCC --| A0   P04 |-- P21
+   SJ1 --| A1   P05 |-- P6        SJ1 --| A1   P05 |-- P22
+   SJ2 --| A2   P06 |-- P7        SJ2 --| A2   P06 |-- P23
+         |      P07 |-- P8              |      P07 |-- P24
+         |          |                   |          |
+         |      P10 |-- P9              |      P10 |-- P25
+         |      P11 |-- P10             |      P11 |-- P26
+         |      P12 |-- P11             |      P12 |-- P27
+         |      P13 |-- P12             |      P13 |-- P28
+         |      P14 |-- P13             |      P14 |-- P29
+         |      P15 |-- P14             |      P15 |-- P30
+         |      P16 |-- P15             |      P16 |-- P31
+         |      P17 |-- P16             |      P17 |-- P32
+         `----------'                   `----------'
+*/
+
+```
+
+### Bootloader
+Default bootloader is `atmel-dfu`.
+Reboot to bootloader via magnetic switch next to icsp header.
+Flash using regular dfu methods.
+
+### XD84 pin mappings
+Taken from [kimera-config.json](https://github.com/kairyu/tkg/blob/master/keyboard/config/kimera-config.json)
+
+	"row_mapping": [ 1, 2, 3, 4, 5, 6 ],
+	"col_mapping": [ 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 ],
+
+# RGB
+- PIN C7
+- Number of RGB LED 7
+
+# Backlight
+    TODO - not working
+
+## Assumptions
+### Pin/Port mappings
+- All cols are on the same IC
+- All rows are on the same IC and port
+- Pins mapped sequentially
+- Each port only does row or column not a mixture of both
+  - No need to have complex port config
+  - 
+
+| ROW index | Kimera Pin | PCA9555           |
+| ----------|------------|-------------------|
+| 0         | 1          | IC1 Port 0  pin 0 |
+| 1         | 2          | IC1 Port 0  pin 1 |
+| 2         | 3          | IC1 Port 0  pin 2 |
+| 3         | 4          | IC1 Port 0  pin 3 |
+| 4         | 5          | IC1 Port 0  pin 4 |
+| 5         | 6          | IC1 Port 0  pin 5 |
+
+- Safe enough to assume `row_index == pin`
+
+
+| COL index | Kimera Pin | PCA9555           |
+| ----------|------------|-------------------|
+| 0         | 17         | IC2 Port 0  pin 0 |
+| 1         | 18         | IC2 Port 0  pin 1 |
+| 2         | 19         | IC2 Port 0  pin 2 |
+| 3         | 20         | IC2 Port 0  pin 3 |
+| 4         | 21         | IC2 Port 0  pin 4 |
+| 5         | 22         | IC2 Port 0  pin 5 |
+| 6         | 23         | IC2 Port 0  pin 6 |
+| 7         | 24         | IC2 Port 0  pin 7 |
+| 8         | 25         | IC2 Port 1  pin 0 |
+| 9         | 26         | IC2 Port 1  pin 1 |
+| 10        | 27         | IC2 Port 1  pin 2 |
+| 11        | 28         | IC2 Port 1  pin 3 |
+| 12        | 29         | IC2 Port 1  pin 4 |
+| 13        | 30         | IC2 Port 1  pin 5 |
+| 14        | 31         | IC2 Port 1  pin 6 |
+
+- Safe enough to assume here col_index does not need to be converted to pin
+- Reading both ports one after the other gives us the same sequential behavior
+  - maps to the usual practice of reading matrix columns
+  - while this technically gives 16 column reads, the 16th column can never be set so is safely ignored
+
+## Notes
+[pca9555 datasheet](https://www.ti.com/lit/ds/symlink/pca9555.pdf)
+
+- Other Kimera based boards with non sequential pin mappings, pins mapped across ICs, or mixed row/col configs will need more complicated `pin -> i2c_addr,port,pin` logic as well as rather more complex pin functions.
+
+## Return to stock firmware
+Not tested but original firmware seems to be available in the [kairyu/tkg-firmware](https://github.com/kairyu/tkg-firmware/blob/master/kimera-core.hex) repo.
diff --git a/keyboards/xd84/info.json b/keyboards/xd84/info.json
new file mode 100644
index 0000000000..b701db1b79
--- /dev/null
+++ b/keyboards/xd84/info.json
@@ -0,0 +1,18 @@
+{
+  "keyboard_name": "XD84",
+  "url": "",
+  "maintainer": "qmk",
+  "width": 16,
+  "height": 6,
+  "layouts": {  
+    "LAYOUT_75_ansi": {
+      "key_count": 84,
+      "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":1, "y":0}, {"label":"F2", "x":2, "y":0}, {"label":"F3", "x":3, "y":0}, {"label":"F4", "x":4, "y":0}, {"label":"F5", "x":5, "y":0}, {"label":"F6", "x":6, "y":0}, {"label":"F7", "x":7, "y":0}, {"label":"F8", "x":8, "y":0}, {"label":"F9", "x":9, "y":0}, {"label":"F10", "x":10, "y":0}, {"label":"F11", "x":11, "y":0}, {"label":"F12", "x":12, "y":0}, {"label":"PrtSc", "x":13, "y":0}, {"label":"Pause", "x":14, "y":0}, {"label":"Delete", "x":15, "y":0}, {"label":"~", "x":0, "y":1}, {"label":"1", "x":1, "y":1}, {"label":"2", "x":2, "y":1}, {"label":"3", "x":3, "y":1}, {"label":"4", "x":4, "y":1}, {"label":"5", "x":5, "y":1}, {"label":"6", "x":6, "y":1}, {"label":"7", "x":7, "y":1}, {"label":"8", "x":8, "y":1}, {"label":"9", "x":9, "y":1}, {"label":"0", "x":10, "y":1}, {"label":"_", "x":11, "y":1}, {"label":"+", "x":12, "y":1}, {"label":"delete", "x":13, "y":1, "w":2}, {"label":"Home", "x":15, "y":1}, {"label":"Tab", "x":0, "y":2, "w":1.5}, {"label":"Q", "x":1.5, "y":2}, {"label":"W", "x":2.5, "y":2}, {"label":"E", "x":3.5, "y":2}, {"label":"R", "x":4.5, "y":2}, {"label":"T", "x":5.5, "y":2}, {"label":"Y", "x":6.5, "y":2}, {"label":"U", "x":7.5, "y":2}, {"label":"I", "x":8.5, "y":2}, {"label":"O", "x":9.5, "y":2}, {"label":"P", "x":10.5, "y":2}, {"label":"{", "x":11.5, "y":2}, {"label":"}", "x":12.5, "y":2}, {"label":"|", "x":13.5, "y":2, "w":1.5}, {"label":"Page Up", "x":15, "y":2}, {"label":"Caps Lock", "x":0, "y":3, "w":1.75}, {"label":"A", "x":1.75, "y":3}, {"label":"S", "x":2.75, "y":3}, {"label":"D", "x":3.75, "y":3}, {"label":"F", "x":4.75, "y":3}, {"label":"G", "x":5.75, "y":3}, {"label":"H", "x":6.75, "y":3}, {"label":"J", "x":7.75, "y":3}, {"label":"K", "x":8.75, "y":3}, {"label":"L", "x":9.75, "y":3}, {"label":":", "x":10.75, "y":3}, {"label":"\"", "x":11.75, "y":3}, {"label":"Enter", "x":12.75, "y":3, "w":2.25}, {"label":"Page Down", "x":15, "y":3}, {"label":"Shift", "x":0, "y":4, "w":2.25}, {"label":"Z", "x":2.25, "y":4}, {"label":"X", "x":3.25, "y":4}, {"label":"C", "x":4.25, "y":4}, {"label":"V", "x":5.25, "y":4}, {"label":"B", "x":6.25, "y":4}, {"label":"N", "x":7.25, "y":4}, {"label":"M", "x":8.25, "y":4}, {"label":"<", "x":9.25, "y":4}, {"label":">", "x":10.25, "y":4}, {"label":"?", "x":11.25, "y":4}, {"label":"Shift", "x":12.25, "y":4, "w":1.75}, {"label":"\u2191", "x":14, "y":4}, {"label":"End", "x":15, "y":4}, {"label":"Ctrl", "x":0, "y":5, "w":1.25}, {"label":"Win", "x":1.25, "y":5, "w":1.25}, {"label":"Alt", "x":2.5, "y":5, "w":1.25}, {"x":3.75, "y":5, "w":6.25}, {"label":"Alt", "x":10, "y":5}, {"label":"Fn", "x":11, "y":5}, {"label":"Ctrl", "x":12, "y":5}, {"label":"\u2190", "x":13, "y":5}, {"label":"\u2193", "x":14, "y":5}, {"label":"\u2192", "x":15, "y":5}]
+    },
+
+    "LAYOUT_75_iso": {
+      "key_count": 85,
+      "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":1, "y":0}, {"label":"F2", "x":2, "y":0}, {"label":"F3", "x":3, "y":0}, {"label":"F4", "x":4, "y":0}, {"label":"F5", "x":5, "y":0}, {"label":"F6", "x":6, "y":0}, {"label":"F7", "x":7, "y":0}, {"label":"F8", "x":8, "y":0}, {"label":"F9", "x":9, "y":0}, {"label":"F10", "x":10, "y":0}, {"label":"F11", "x":11, "y":0}, {"label":"F12", "x":12, "y":0}, {"label":"PrtSc", "x":13, "y":0}, {"label":"Pause", "x":14, "y":0}, {"label":"Delete", "x":15, "y":0}, {"label":"~", "x":0, "y":1}, {"label":"1", "x":1, "y":1}, {"label":"2", "x":2, "y":1}, {"label":"3", "x":3, "y":1}, {"label":"4", "x":4, "y":1}, {"label":"5", "x":5, "y":1}, {"label":"6", "x":6, "y":1}, {"label":"7", "x":7, "y":1}, {"label":"8", "x":8, "y":1}, {"label":"9", "x":9, "y":1}, {"label":"0", "x":10, "y":1}, {"label":"_", "x":11, "y":1}, {"label":"+", "x":12, "y":1}, {"label":"delete", "x":13, "y":1, "w":2}, {"label":"Home", "x":15, "y":1}, {"label":"Tab", "x":0, "y":2, "w":1.5}, {"label":"Q", "x":1.5, "y":2}, {"label":"W", "x":2.5, "y":2}, {"label":"E", "x":3.5, "y":2}, {"label":"R", "x":4.5, "y":2}, {"label":"T", "x":5.5, "y":2}, {"label":"Y", "x":6.5, "y":2}, {"label":"U", "x":7.5, "y":2}, {"label":"I", "x":8.5, "y":2}, {"label":"O", "x":9.5, "y":2}, {"label":"P", "x":10.5, "y":2}, {"label":"{", "x":11.5, "y":2}, {"label":"}", "x":12.5, "y":2}, {"label":"Enter", "x":13.75, "y":2, "w":1.25, "h":2}, {"label":"Page Up", "x":15, "y":2}, {"label":"Caps Lock", "x":0, "y":3, "w":1.75}, {"label":"A", "x":1.75, "y":3}, {"label":"S", "x":2.75, "y":3}, {"label":"D", "x":3.75, "y":3}, {"label":"F", "x":4.75, "y":3}, {"label":"G", "x":5.75, "y":3}, {"label":"H", "x":6.75, "y":3}, {"label":"J", "x":7.75, "y":3}, {"label":"K", "x":8.75, "y":3}, {"label":"L", "x":9.75, "y":3}, {"label":":", "x":10.75, "y":3}, {"label":"@", "x":11.75, "y":3}, {"label":"~", "x":12.75, "y":3}, {"label":"Page Down", "x":15, "y":3}, {"label":"Shift", "x":0, "y":4, "w":1.25}, {"x":1.25, "y":4}, {"label":"Z", "x":2.25, "y":4}, {"label":"X", "x":3.25, "y":4}, {"label":"C", "x":4.25, "y":4}, {"label":"V", "x":5.25, "y":4}, {"label":"B", "x":6.25, "y":4}, {"label":"N", "x":7.25, "y":4}, {"label":"M", "x":8.25, "y":4}, {"label":"<", "x":9.25, "y":4}, {"label":">", "x":10.25, "y":4}, {"label":"?", "x":11.25, "y":4}, {"label":"Shift", "x":12.25, "y":4, "w":1.75}, {"label":"\u2191", "x":14, "y":4}, {"label":"End", "x":15, "y":4}, {"label":"Ctrl", "x":0, "y":5, "w":1.25}, {"label":"Win", "x":1.25, "y":5, "w":1.25}, {"label":"Alt", "x":2.5, "y":5, "w":1.25}, {"x":3.75, "y":5, "w":6.25}, {"label":"Alt", "x":10, "y":5}, {"label":"Fn", "x":11, "y":5}, {"label":"Ctrl", "x":12, "y":5}, {"label":"\u2190", "x":13, "y":5}, {"label":"\u2193", "x":14, "y":5}, {"label":"\u2192", "x":15, "y":5}]
+    }
+  }
+}
\ No newline at end of file
diff --git a/keyboards/xd84/keymaps/default/keymap.c b/keyboards/xd84/keymaps/default/keymap.c
new file mode 100644
index 0000000000..4b9cf9fd24
--- /dev/null
+++ b/keyboards/xd84/keymaps/default/keymap.c
@@ -0,0 +1,38 @@
+#include QMK_KEYBOARD_H
+
+#define L1_RGUI LM(1, MOD_RGUI)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT_75_ansi(
+/* ┌─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┐ */
+    KC_ESC,   KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_F13,  KC_PAUS,  KC_DEL,
+/* ├─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┴─────────┼─────────┤ */
+	  KC_GRV,   KC_1,     KC_2,     KC_3,     KC_4,     KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     KC_MINS,  KC_EQL,   KC_BSPC,            KC_HOME,
+/* ├─────────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬──────────────┼─────────┤ */
+	  KC_TAB, 	     KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,     KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_LBRC,  KC_RBRC,  KC_BSLS,       KC_PGUP,
+/* ├──────────────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──────────────├─────────┤ */
+	  KC_CAPS,          KC_A,     KC_S,     KC_D,     KC_F,     KC_G,     KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,  KC_ENT,               KC_PGDN,
+/* ├─────────────────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───────────┬─────────┼─────────┤ */
+	  KC_LSFT,              KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,     KC_N,     KC_M,     KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,          KC_UP,    KC_END,
+/* ├───────────┬─────────┴─┬───────┴───┬─────┴─────────┴─────────┴─────────┴─────────┴─────────┴───────┬─┴───────┬─┴───────┬─┴───────┬─────────┼─────────┼─────────┤ */
+	  KC_LCTL,    KC_LGUI,    KC_LALT,    KC_SPC,                                                         KC_RALT,  L1_RGUI,  KC_RCTL,  KC_LEFT,  KC_DOWN,  KC_RGHT
+/* └───────────┴───────────┴───────────┴───────────────────────────────────────────────────────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┘ */
+  ),
+
+  [1] = LAYOUT_75_ansi(
+/* ┌─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┐ */
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+/* ├─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┴─────────┼─────────┤ */
+	  _______,  RGB_TOG,  RGB_MOD,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,            _______,
+/* ├─────────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬──────────────┼─────────┤ */
+	  _______, 	     _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,       _______,
+/* ├──────────────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──────────────├─────────┤ */
+	  _______,          _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,              _______,
+/* ├─────────────────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───────────┬─────────┼─────────┤ */
+	  _______,              _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,          _______,  _______,
+/* ├───────────┬─────────┴─┬───────┴───┬─────┴─────────┴─────────┴─────────┴─────────┴─────────┴───────┬─┴───────┬─┴───────┬─┴───────┬─────────┼─────────┼─────────┤ */
+	  _______,    _______,    _______,    _______,                                                        _______,  _______,  _______,  _______,  _______,  _______
+/* └───────────┴───────────┴───────────┴───────────────────────────────────────────────────────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┘ */
+  )
+};
diff --git a/keyboards/xd84/keymaps/default_iso/keymap.c b/keyboards/xd84/keymaps/default_iso/keymap.c
new file mode 100644
index 0000000000..18a0f06a82
--- /dev/null
+++ b/keyboards/xd84/keymaps/default_iso/keymap.c
@@ -0,0 +1,38 @@
+#include QMK_KEYBOARD_H
+
+#define L1_RGUI LM(1, MOD_RGUI)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT_75_iso(
+/* ┌─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┐ */
+    KC_ESC,   KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_PSCR,  KC_PAUS,  KC_DEL,
+/* ├─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┴─────────┼─────────┤ */
+	  KC_GRV,   KC_1,     KC_2,     KC_3,     KC_4,     KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     KC_MINS,  KC_EQL,   KC_BSPC,            KC_HOME,
+/* ├─────────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬──────────────┼─────────┤ */
+	  KC_TAB, 	     KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,     KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_LBRC,  KC_RBRC,                 KC_PGUP,
+/* ├──────────────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬           ├─────────┤ */
+	  KC_CAPS,          KC_A,     KC_S,     KC_D,     KC_F,     KC_G,     KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,  KC_NUHS,  KC_ENT,     KC_PGDN,
+/* ├───────────┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴─────────┴─┬─────────┼─────────┤ */
+	  KC_LSFT,    KC_NUBS,  KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,     KC_N,     KC_M,     KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,          KC_UP,    KC_END,
+/* ├───────────┼─────────┴─┬───────┴───┬─────┴─────────┴─────────┴─────────┴─────────┴─────────┴───────┬─┴───────┬─┴───────┬─┴───────┬─────────┼─────────┼─────────┤ */
+	  KC_LCTL,    KC_LGUI,    KC_LALT,    KC_SPC,                                                         KC_RALT,  L1_RGUI,  KC_RCTL,  KC_LEFT,  KC_DOWN,  KC_RGHT
+/* └───────────┴───────────┴───────────┴───────────────────────────────────────────────────────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┘ */
+  ),
+
+  [1] = LAYOUT_75_iso(
+/* ┌─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┐ */
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+/* ├─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┴─────────┼─────────┤ */
+	  _______,  RGB_TOG,  RGB_MOD,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,            _______,
+/* ├─────────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬────┴────┬──────────────┼─────────┤ */
+	  _______, 	     _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,                 _______,
+/* ├──────────────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬──────┴──┬           ├─────────┤ */
+	  _______,          _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,    _______,
+/* ├───────────┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴───┬─────┴─────────┴─┬─────────┼─────────┤ */
+	  _______,    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,          _______,  _______,
+/* ├───────────┼─────────┴─┬───────┴───┬─────┴─────────┴─────────┴─────────┴─────────┴─────────┴───────┬─┴───────┬─┴───────┬─┴───────┬─────────┼─────────┼─────────┤ */
+	  _______,    _______,    _______,    _______,                                                        _______,  _______,  _______,  _______,  _______,  _______
+/* └───────────┴───────────┴───────────┴───────────────────────────────────────────────────────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┘ */
+  )
+};
diff --git a/keyboards/xd84/matrix.c b/keyboards/xd84/matrix.c
new file mode 100644
index 0000000000..a359050477
--- /dev/null
+++ b/keyboards/xd84/matrix.c
@@ -0,0 +1,94 @@
+/* Copyright 2019
+ *
+ * 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 <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <string.h>
+#include "matrix.h"
+#include "pca9555.h"
+#include "quantum.h"
+
+#include "debug.h"
+
+// PCA9555 slave addresses
+#define IC1 0x20
+#define IC2 0x21
+
+//_____Utility funcs___________________________________________________________
+
+static void init_pins(void) {
+  // init all cols high - IC2 all input
+  pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT);//same as initial state
+  pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT);//same as initial state
+
+  // init all rows - IC1 port0 input
+  pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT);//same as initial state
+}
+
+static void select_row(uint8_t row) {
+  // For the XD84 all rows are on the same IC and port
+  // so its safe enough to assume here row == pin
+  uint8_t pin = row;
+  uint8_t mask = 1 << pin;
+
+  pca9555_set_output(IC1, PCA9555_PORT0, ALL_HIGH & (~mask));
+  pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
+}
+
+static uint16_t read_cols(void) {
+  uint16_t state_1 = pca9555_readPins(IC2, PCA9555_PORT0);
+  uint16_t state_2 = pca9555_readPins(IC2, PCA9555_PORT1);
+
+  // For the XD84 all cols are on the same IC and mapped sequentially
+  // while this technically gives 16 column reads,
+  // the 16th column can never be set so is safely ignored
+  return ~((state_2 << 8) | state_1);
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+  // Store last value of row prior to reading
+  matrix_row_t last_row_value = current_matrix[current_row];
+
+  // Clear data in matrix row
+  current_matrix[current_row] = 0;
+
+  // Select row and wait for row selecton to stabilize
+  select_row(current_row);
+  wait_us(30);
+
+  current_matrix[current_row] = read_cols();
+
+  // No need to Unselect row as the next `select_row` will blank everything
+
+  return (last_row_value != current_matrix[current_row]);
+}
+
+//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________
+
+void custom_matrix_init(void) {
+  pca9555_init(IC1);
+  pca9555_init(IC2);
+
+  init_pins();
+}
+
+bool custom_matrix_scan(matrix_row_t current_matrix[]) {
+  bool changed = false;
+  for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+    changed |= read_cols_on_row(current_matrix, current_row);
+  }
+  return changed;
+}
\ No newline at end of file
diff --git a/keyboards/xd84/pca9555.c b/keyboards/xd84/pca9555.c
new file mode 100644
index 0000000000..df4631e9d7
--- /dev/null
+++ b/keyboards/xd84/pca9555.c
@@ -0,0 +1,63 @@
+#include "i2c_master.h"
+#include "pca9555.h"
+
+#include "debug.h"
+
+#define SLAVE_TO_ADDR(n)   (n<<1)
+#define TIMEOUT 100
+
+enum {
+  CMD_INPUT_0 = 0,
+  CMD_INPUT_1,
+  CMD_OUTPUT_0,
+  CMD_OUTPUT_1,
+  CMD_INVERSION_0,
+  CMD_INVERSION_1,
+  CMD_CONFIG_0,
+  CMD_CONFIG_1
+};
+
+void pca9555_init(uint8_t slave_addr) {
+  static uint8_t s_init = 0;
+  if (!s_init) {
+    i2c_init();
+
+    s_init=1;
+  }
+
+  // TODO: could check device connected
+  //i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE);
+  //i2c_stop();
+}
+
+void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) {
+  uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+  uint8_t cmd = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0;
+
+  i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+  if (ret != I2C_STATUS_SUCCESS) {
+    print("pca9555_set_config::FAILED\n");
+  }
+}
+
+void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) {
+  uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+  uint8_t cmd = port ? CMD_CONFIG_1 : CMD_CONFIG_0;
+
+  i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+  if (ret != I2C_STATUS_SUCCESS) {
+    print("pca9555_set_output::FAILED\n");
+  }
+}
+
+uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
+  uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+  uint8_t cmd = port ? CMD_INPUT_1 : CMD_INPUT_0;
+
+  uint8_t data = 0;
+  i2c_status_t ret = i2c_readReg(addr, cmd, &data, sizeof(data), TIMEOUT);
+  if (ret != I2C_STATUS_SUCCESS) {
+    print("pca9555_readPins::FAILED\n");
+  }
+  return data;
+}
diff --git a/keyboards/xd84/pca9555.h b/keyboards/xd84/pca9555.h
new file mode 100644
index 0000000000..6aaee8a6f8
--- /dev/null
+++ b/keyboards/xd84/pca9555.h
@@ -0,0 +1,55 @@
+/* Copyright 2019
+ *
+ * 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/>.
+ */
+#pragma once
+
+/*
+            PCA9555
+         ,----------.
+   SDA --| SDA  P00 |-- P1
+   SCL --| SCL  P01 |-- P2
+   INT --| INT  P02 |-- P3
+         |      P03 |-- P4
+   A0  --| A0   P04 |-- P5
+   A1  --| A1   P05 |-- P6
+   A2  --| A2   P06 |-- P7
+         |      P07 |-- P8
+         |          |      
+         |      P10 |-- P10
+         |      P11 |-- P11
+         |      P12 |-- P12
+         |      P13 |-- P13
+         |      P14 |-- P14
+         |      P15 |-- P15
+         |      P16 |-- P16
+         |      P17 |-- P17
+         `----------'      
+*/
+
+#define PCA9555_PORT0 0
+#define PCA9555_PORT1 1
+
+#define ALL_OUTPUT 0
+#define ALL_INPUT 0xFF
+#define ALL_LOW 0
+#define ALL_HIGH 0xFF
+
+void pca9555_init(uint8_t slave_addr);
+
+void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf);
+
+void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf);
+
+uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port);
\ No newline at end of file
diff --git a/keyboards/xd84/readme.md b/keyboards/xd84/readme.md
new file mode 100644
index 0000000000..38b4efcba2
--- /dev/null
+++ b/keyboards/xd84/readme.md
@@ -0,0 +1,23 @@
+# XD84
+
+![XD84](https://cdn.shopify.com/s/files/1/2711/4238/products/HTB17eeJSXXXXXbIXFXXq6xXFXXXp_1024x1024.jpg?v=1515505994)
+
+Compact With 84 Keys & RGB LED Underglow
+- Designed by Xiudi
+- Up to 87 keys
+  - iso and ansi support
+- Uses Kimera core
+
+Keyboard Maintainer: QMK Community  
+Hardware Supported: XD84  
+Hardware Availability: [KPrepublic](https://kprepublic.com/products/xd84-xiudi-70-custom-keyboard-pcb)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make xd84:default
+
+Install examples:
+
+    make xd84:default:dfu
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/xd84/rules.mk b/keyboards/xd84/rules.mk
new file mode 100644
index 0000000000..0806d092ff
--- /dev/null
+++ b/keyboards/xd84/rules.mk
@@ -0,0 +1,86 @@
+# MCU name
+MCU = atmega32u4
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the
+#     processor frequency in Hz. You can then use this symbol in your source code to
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#
+#     This will be an integer division of F_USB below, as it is sourced by
+#     F_USB after it has run through any CPU prescalers. Note that this value
+#     does not *change* the processor frequency - it should merely be updated to
+#     reflect the processor speed set externally so that the code can use accurate
+#     software delays.
+F_CPU = 16000000
+
+
+#
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+# Input clock frequency.
+#     This will define a symbol, F_USB, in all source code files equal to the
+#     input clock frequency (before any prescaling is performed) in Hz. This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)
+
+# Interrupt driven control endpoint task(+60)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   atmega32a    bootloadHID
+BOOTLOADER = atmel-dfu
+
+
+# If you don't know the bootloader type, then you can specify the
+# Boot Section Size in *bytes* by uncommenting out the OPT_DEFS line
+#   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
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no        # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = no         # Console for debug(+400)
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support (+2400 to 4200, depending on config)
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no 		# Enable support for HD44780 based LCDs (+400)
+
+# custom matrix setup
+CUSTOM_MATRIX = yes
+SRC = i2c_master.c custom_matrix_helper.c pca9555.c matrix.c
+
+LAYOUTS = 75_ansi 75_iso
\ No newline at end of file
diff --git a/keyboards/xd84/xd84.c b/keyboards/xd84/xd84.c
new file mode 100644
index 0000000000..f7048f3252
--- /dev/null
+++ b/keyboards/xd84/xd84.c
@@ -0,0 +1,43 @@
+/* Copyright 2019
+ *
+ * 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 "xd84.h"
+
+void matrix_init_kb(void) {
+	// put your keyboard start-up code here
+	// runs once when the firmware starts up
+
+	matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+	// put your looping keyboard code here
+	// runs every cycle (a lot)
+
+	matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+	// put your per-action keyboard code here
+	// runs for every action, just before processing by the firmware
+
+	return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+	led_set_user(usb_led);
+}
diff --git a/keyboards/xd84/xd84.h b/keyboards/xd84/xd84.h
new file mode 100644
index 0000000000..d59956f691
--- /dev/null
+++ b/keyboards/xd84/xd84.h
@@ -0,0 +1,59 @@
+/* Copyright 2019
+ *
+ * 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/>.
+ */
+#pragma once
+
+#include "quantum.h"
+#define ____ KC_NO
+
+/* This a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT_75_ansi( \
+    K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115, K116, \
+    K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214,       K216, \
+    K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K313, K314,       K316, \
+    K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412,       K414,       K416, \
+    K501,       K503, K504, K505, K506, K507, K508, K509, K510, K511, K512, K513,       K515, K516, \
+    K601, K602, K603,                       K607,               K611, K612, K613, K614, K615, K616  \
+) { \
+    { K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K116 }, \
+    { K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214, K216 }, \
+    { K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K313, K314, K316 }, \
+    { K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, ____, K414, K416 }, \
+    { K501, ____, K503, K504, K505, K506, K507, K508, K509, K510, K511, K512, K513, K515, K516 }, \
+    { K601, K602, K603, ____, ____, K607, K115, ____, K613, ____, K611, K612, K614, K615, K616 }  \
+}
+
+#define LAYOUT_75_iso( \
+    K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115, K116, \
+    K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214,       K216, \
+    K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K313,             K316, \
+    K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412,       K414, K415, K416, \
+    K501, K502, K503, K504, K505, K506, K507, K508, K509, K510, K511, K512, K513,       K515, K516, \
+    K601, K602, K603,                       K607,               K611, K612, K613, K614, K615, K616  \
+) { \
+    { K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K116 }, \
+    { K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K214, K216 }, \
+    { K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K313, ____, K316 }, \
+    { K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, K414, K415, K416 }, \
+    { K501, K502, K503, K504, K505, K506, K507, K508, K509, K510, K511, K512, K513, K515, K516 }, \
+    { K601, K602, K603, ____, ____, K607, K115, ____, K613, ____, K611, K612, K614, K615, K616 }  \
+}