Initial firmware for Retro75 (#7294)

* Initial firmware for Retro75

* Update readme to match new template guidelines

11 files changed, 1487 insertions, 0 deletions

diff --git a/keyboards/retro_75/chconf.h b/keyboards/retro_75/chconf.h
new file mode 100644
index 000000000..99fa8ce39
--- /dev/null
+++ b/keyboards/retro_75/chconf.h
@@ -0,0 +1,524 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    templates/chconf.h
+ * @brief   Configuration file template.
+ * @details A copy of this file must be placed in each project directory, it
+ *          contains the application specific kernel settings.
+ *
+ * @addtogroup config
+ * @details Kernel related settings and hooks.
+ * @{
+ */
+
+#ifndef CHCONF_H
+#define CHCONF_H
+
+#define _CHIBIOS_RT_CONF_
+
+/*===========================================================================*/
+/**
+ * @name System timers settings
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   System time counter resolution.
+ * @note    Allowed values are 16 or 32 bits.
+ */
+#define CH_CFG_ST_RESOLUTION                32
+
+/**
+ * @brief   System tick frequency.
+ * @details Frequency of the system timer that drives the system ticks. This
+ *          setting also defines the system tick time unit.
+ */
+#define CH_CFG_ST_FREQUENCY                 10000
+
+/**
+ * @brief   Time delta constant for the tick-less mode.
+ * @note    If this value is zero then the system uses the classic
+ *          periodic tick. This value represents the minimum number
+ *          of ticks that is safe to specify in a timeout directive.
+ *          The value one is not valid, timeouts are rounded up to
+ *          this value.
+ */
+#define CH_CFG_ST_TIMEDELTA                 2
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Kernel parameters and options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Round robin interval.
+ * @details This constant is the number of system ticks allowed for the
+ *          threads before preemption occurs. Setting this value to zero
+ *          disables the preemption for threads with equal priority and the
+ *          round robin becomes cooperative. Note that higher priority
+ *          threads can still preempt, the kernel is always preemptive.
+ * @note    Disabling the round robin preemption makes the kernel more compact
+ *          and generally faster.
+ * @note    The round robin preemption is not supported in tickless mode and
+ *          must be set to zero in that case.
+ */
+#define CH_CFG_TIME_QUANTUM                 0
+
+/**
+ * @brief   Managed RAM size.
+ * @details Size of the RAM area to be managed by the OS. If set to zero
+ *          then the whole available RAM is used. The core memory is made
+ *          available to the heap allocator and/or can be used directly through
+ *          the simplified core memory allocator.
+ *
+ * @note    In order to let the OS manage the whole RAM the linker script must
+ *          provide the @p __heap_base__ and @p __heap_end__ symbols.
+ * @note    Requires @p CH_CFG_USE_MEMCORE.
+ */
+#define CH_CFG_MEMCORE_SIZE                 0
+
+/**
+ * @brief   Idle thread automatic spawn suppression.
+ * @details When this option is activated the function @p chSysInit()
+ *          does not spawn the idle thread. The application @p main()
+ *          function becomes the idle thread and must implement an
+ *          infinite loop.
+ */
+#define CH_CFG_NO_IDLE_THREAD               FALSE
+
+/* Use __WFI in the idle thread for waiting. Does lower the power
+ * consumption. */
+#define CORTEX_ENABLE_WFI_IDLE              TRUE
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Performance options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   OS optimization.
+ * @details If enabled then time efficient rather than space efficient code
+ *          is used when two possible implementations exist.
+ *
+ * @note    This is not related to the compiler optimization options.
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_OPTIMIZE_SPEED               FALSE
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Subsystem options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Time Measurement APIs.
+ * @details If enabled then the time measurement APIs are included in
+ *          the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_TM                       FALSE
+
+/**
+ * @brief   Threads registry APIs.
+ * @details If enabled then the registry APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_REGISTRY                 TRUE
+
+/**
+ * @brief   Threads synchronization APIs.
+ * @details If enabled then the @p chThdWait() function is included in
+ *          the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_WAITEXIT                 TRUE
+
+/**
+ * @brief   Semaphores APIs.
+ * @details If enabled then the Semaphores APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_SEMAPHORES               TRUE
+
+/**
+ * @brief   Semaphores queuing mode.
+ * @details If enabled then the threads are enqueued on semaphores by
+ *          priority rather than in FIFO order.
+ *
+ * @note    The default is @p FALSE. Enable this if you have special
+ *          requirements.
+ * @note    Requires @p CH_CFG_USE_SEMAPHORES.
+ */
+#define CH_CFG_USE_SEMAPHORES_PRIORITY      FALSE
+
+/**
+ * @brief   Mutexes APIs.
+ * @details If enabled then the mutexes APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_MUTEXES                  TRUE
+
+/**
+ * @brief   Enables recursive behavior on mutexes.
+ * @note    Recursive mutexes are heavier and have an increased
+ *          memory footprint.
+ *
+ * @note    The default is @p FALSE.
+ * @note    Requires @p CH_CFG_USE_MUTEXES.
+ */
+#define CH_CFG_USE_MUTEXES_RECURSIVE        FALSE
+
+/**
+ * @brief   Conditional Variables APIs.
+ * @details If enabled then the conditional variables APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_MUTEXES.
+ */
+#define CH_CFG_USE_CONDVARS                 TRUE
+
+/**
+ * @brief   Conditional Variables APIs with timeout.
+ * @details If enabled then the conditional variables APIs with timeout
+ *          specification are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_CONDVARS.
+ */
+#define CH_CFG_USE_CONDVARS_TIMEOUT         FALSE
+
+/**
+ * @brief   Events Flags APIs.
+ * @details If enabled then the event flags APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_EVENTS                   TRUE
+
+/**
+ * @brief   Events Flags APIs with timeout.
+ * @details If enabled then the events APIs with timeout specification
+ *          are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_EVENTS.
+ */
+#define CH_CFG_USE_EVENTS_TIMEOUT           TRUE
+
+/**
+ * @brief   Synchronous Messages APIs.
+ * @details If enabled then the synchronous messages APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_MESSAGES                 TRUE
+
+/**
+ * @brief   Synchronous Messages queuing mode.
+ * @details If enabled then messages are served by priority rather than in
+ *          FIFO order.
+ *
+ * @note    The default is @p FALSE. Enable this if you have special
+ *          requirements.
+ * @note    Requires @p CH_CFG_USE_MESSAGES.
+ */
+#define CH_CFG_USE_MESSAGES_PRIORITY        FALSE
+
+/**
+ * @brief   Mailboxes APIs.
+ * @details If enabled then the asynchronous messages (mailboxes) APIs are
+ *          included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_SEMAPHORES.
+ */
+#define CH_CFG_USE_MAILBOXES                TRUE
+
+/**
+ * @brief   Core Memory Manager APIs.
+ * @details If enabled then the core memory manager APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_MEMCORE                  FALSE
+
+/**
+ * @brief   Heap Allocator APIs.
+ * @details If enabled then the memory heap allocator APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_MEMCORE and either @p CH_CFG_USE_MUTEXES or
+ *          @p CH_CFG_USE_SEMAPHORES.
+ * @note    Mutexes are recommended.
+ */
+#define CH_CFG_USE_HEAP                     FALSE
+
+/**
+ * @brief   Memory Pools Allocator APIs.
+ * @details If enabled then the memory pools allocator APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#define CH_CFG_USE_MEMPOOLS                 FALSE
+
+/**
+ * @brief   Dynamic Threads APIs.
+ * @details If enabled then the dynamic threads creation APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_WAITEXIT.
+ * @note    Requires @p CH_CFG_USE_HEAP and/or @p CH_CFG_USE_MEMPOOLS.
+ */
+#define CH_CFG_USE_DYNAMIC                  FALSE
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Debug options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Debug option, kernel statistics.
+ *
+ * @note    The default is @p FALSE.
+ */
+#define CH_DBG_STATISTICS                   FALSE
+
+/**
+ * @brief   Debug option, system state check.
+ * @details If enabled the correct call protocol for system APIs is checked
+ *          at runtime.
+ *
+ * @note    The default is @p FALSE.
+ */
+#define CH_DBG_SYSTEM_STATE_CHECK           FALSE
+
+/**
+ * @brief   Debug option, parameters checks.
+ * @details If enabled then the checks on the API functions input
+ *          parameters are activated.
+ *
+ * @note    The default is @p FALSE.
+ */
+#define CH_DBG_ENABLE_CHECKS                FALSE
+
+/**
+ * @brief   Debug option, consistency checks.
+ * @details If enabled then all the assertions in the kernel code are
+ *          activated. This includes consistency checks inside the kernel,
+ *          runtime anomalies and port-defined checks.
+ *
+ * @note    The default is @p FALSE.
+ */
+#define CH_DBG_ENABLE_ASSERTS               FALSE
+
+/**
+ * @brief   Debug option, trace buffer.
+ * @details If enabled then the trace buffer is activated.
+ *
+ * @note    The default is @p CH_DBG_TRACE_MASK_DISABLED.
+ */
+#define CH_DBG_TRACE_MASK                   CH_DBG_TRACE_MASK_DISABLED
+
+/**
+ * @brief   Trace buffer entries.
+ * @note    The trace buffer is only allocated if @p CH_DBG_TRACE_MASK is
+ *          different from @p CH_DBG_TRACE_MASK_DISABLED.
+ */
+#define CH_DBG_TRACE_BUFFER_SIZE            128
+
+/**
+ * @brief   Debug option, stack checks.
+ * @details If enabled then a runtime stack check is performed.
+ *
+ * @note    The default is @p FALSE.
+ * @note    The stack check is performed in a architecture/port dependent way.
+ *          It may not be implemented or some ports.
+ * @note    The default failure mode is to halt the system with the global
+ *          @p panic_msg variable set to @p NULL.
+ */
+#define CH_DBG_ENABLE_STACK_CHECK           FALSE
+
+/**
+ * @brief   Debug option, stacks initialization.
+ * @details If enabled then the threads working area is filled with a byte
+ *          value when a thread is created. This can be useful for the
+ *          runtime measurement of the used stack.
+ *
+ * @note    The default is @p FALSE.
+ */
+#define CH_DBG_FILL_THREADS                 FALSE
+
+/**
+ * @brief   Debug option, threads profiling.
+ * @details If enabled then a field is added to the @p thread_t structure that
+ *          counts the system ticks occurred while executing the thread.
+ *
+ * @note    The default is @p FALSE.
+ * @note    This debug option is not currently compatible with the
+ *          tickless mode.
+ */
+#define CH_DBG_THREADS_PROFILING            FALSE
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Kernel hooks
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Threads descriptor structure extension.
+ * @details User fields added to the end of the @p thread_t structure.
+ */
+#define CH_CFG_THREAD_EXTRA_FIELDS                                          \
+  /* Add threads custom fields here.*/
+
+/**
+ * @brief   Threads initialization hook.
+ * @details User initialization code added to the @p chThdInit() API.
+ *
+ * @note    It is invoked from within @p chThdInit() and implicitly from all
+ *          the threads creation APIs.
+ */
+#define CH_CFG_THREAD_INIT_HOOK(tp) {                                       \
+  /* Add threads initialization code here.*/                                \
+}
+
+/**
+ * @brief   Threads finalization hook.
+ * @details User finalization code added to the @p chThdExit() API.
+ */
+#define CH_CFG_THREAD_EXIT_HOOK(tp) {                                       \
+  /* Add threads finalization code here.*/                                  \
+}
+
+/**
+ * @brief   Context switch hook.
+ * @details This hook is invoked just before switching between threads.
+ */
+#define CH_CFG_CONTEXT_SWITCH_HOOK(ntp, otp) {                              \
+  /* Context switch code here.*/                                            \
+}
+
+/**
+ * @brief   ISR enter hook.
+ */
+#define CH_CFG_IRQ_PROLOGUE_HOOK() {                                        \
+  /* IRQ prologue code here.*/                                              \
+}
+
+/**
+ * @brief   ISR exit hook.
+ */
+#define CH_CFG_IRQ_EPILOGUE_HOOK() {                                        \
+  /* IRQ epilogue code here.*/                                              \
+}
+
+/**
+ * @brief   Idle thread enter hook.
+ * @note    This hook is invoked within a critical zone, no OS functions
+ *          should be invoked from here.
+ * @note    This macro can be used to activate a power saving mode.
+ */
+#define CH_CFG_IDLE_ENTER_HOOK() {                                          \
+  /* Idle-enter code here.*/                                                \
+}
+
+/**
+ * @brief   Idle thread leave hook.
+ * @note    This hook is invoked within a critical zone, no OS functions
+ *          should be invoked from here.
+ * @note    This macro can be used to deactivate a power saving mode.
+ */
+#define CH_CFG_IDLE_LEAVE_HOOK() {                                          \
+  /* Idle-leave code here.*/                                                \
+}
+
+/**
+ * @brief   Idle Loop hook.
+ * @details This hook is continuously invoked by the idle thread loop.
+ */
+#define CH_CFG_IDLE_LOOP_HOOK() {                                           \
+  /* Idle loop code here.*/                                                 \
+}
+
+/**
+ * @brief   System tick event hook.
+ * @details This hook is invoked in the system tick handler immediately
+ *          after processing the virtual timers queue.
+ */
+#define CH_CFG_SYSTEM_TICK_HOOK() {                                         \
+  /* System tick event code here.*/                                         \
+}
+
+/**
+ * @brief   System halt hook.
+ * @details This hook is invoked in case to a system halting error before
+ *          the system is halted.
+ */
+#define CH_CFG_SYSTEM_HALT_HOOK(reason) {                                   \
+  /* System halt code here.*/                                               \
+}
+
+/**
+ * @brief   Trace hook.
+ * @details This hook is invoked each time a new record is written in the
+ *          trace buffer.
+ */
+#define CH_CFG_TRACE_HOOK(tep) {                                            \
+  /* Trace code here.*/                                                     \
+}
+
+/** @} */
+
+/*===========================================================================*/
+/* Port-specific settings (override port settings defaulted in chcore.h).    */
+/*===========================================================================*/
+
+#endif  /* CHCONF_H */
+
+/** @} */
diff --git a/keyboards/retro_75/config.h b/keyboards/retro_75/config.h
new file mode 100644
index 000000000..a6b8ec672
--- /dev/null
+++ b/keyboards/retro_75/config.h
@@ -0,0 +1,249 @@
+/*
+Copyright 2019 zvecr<git@zvecr.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/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x5275
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    PheonixStarr
+#define PRODUCT         Retro75
+#define DESCRIPTION     A custom 75% keyboard
+
+/* key matrix size */
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 16
+
+/*
+ * 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 { A8, B15, B14, B13, B12, B8 }
+#define MATRIX_COL_PINS { A5, A4, A3, F0, C15, C14, C13, A6, B11, B10, B2, B1, B0, A7, A14, A15 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+//#define SOFT_SERIAL_PIN D0  // or D1, D2, D3, E6
+
+// #define BACKLIGHT_PIN B7
+// #define BACKLIGHT_BREATHING
+// #define BACKLIGHT_LEVELS 3
+
+#define RGB_DI_PIN A9
+// #ifdef RGB_DI_PIN
+#define RGBLED_NUM 18
+//   #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
+// /*== customize breathing effect ==*/
+//   /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//   #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+//   /*==== use exp() and sin() ====*/
+//   #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//   #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+// #endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* 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_MASK_SHIFT)
+
+/* 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_HELP           H
+//#define MAGIC_KEY_HELP_ALT       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         0
+//#define MAGIC_KEY_LAYER0_ALT     GRAVE
+//#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     B
+//#define MAGIC_KEY_BOOTLOADER_ALT ESC
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_EEPROM_CLEAR   BSPACE
+//#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/retro_75/halconf.h b/keyboards/retro_75/halconf.h
new file mode 100644
index 000000000..8b9724b1a
--- /dev/null
+++ b/keyboards/retro_75/halconf.h
@@ -0,0 +1,353 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    templates/halconf.h
+ * @brief   HAL configuration header.
+ * @details HAL configuration file, this file allows to enable or disable the
+ *          various device drivers from your application. You may also use
+ *          this file in order to override the device drivers default settings.
+ *
+ * @addtogroup HAL_CONF
+ * @{
+ */
+
+#ifndef _HALCONF_H_
+#define _HALCONF_H_
+
+#include "mcuconf.h"
+
+/**
+ * @brief   Enables the PAL subsystem.
+ */
+#if !defined(HAL_USE_PAL) || defined(__DOXYGEN__)
+#define HAL_USE_PAL                 TRUE
+#endif
+
+/**
+ * @brief   Enables the ADC subsystem.
+ */
+#if !defined(HAL_USE_ADC) || defined(__DOXYGEN__)
+#define HAL_USE_ADC                 FALSE
+#endif
+
+/**
+ * @brief   Enables the CAN subsystem.
+ */
+#if !defined(HAL_USE_CAN) || defined(__DOXYGEN__)
+#define HAL_USE_CAN                 FALSE
+#endif
+
+/**
+ * @brief   Enables the DAC subsystem.
+ */
+#if !defined(HAL_USE_DAC) || defined(__DOXYGEN__)
+#define HAL_USE_DAC                 FALSE
+#endif
+
+/**
+ * @brief   Enables the EXT subsystem.
+ */
+#if !defined(HAL_USE_EXT) || defined(__DOXYGEN__)
+#define HAL_USE_EXT                 FALSE
+#endif
+
+/**
+ * @brief   Enables the GPT subsystem.
+ */
+#if !defined(HAL_USE_GPT) || defined(__DOXYGEN__)
+#define HAL_USE_GPT                 FALSE
+#endif
+
+/**
+ * @brief   Enables the I2C subsystem.
+ */
+#if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
+#define HAL_USE_I2C                 FALSE
+#endif
+
+/**
+ * @brief   Enables the I2S subsystem.
+ */
+#if !defined(HAL_USE_I2S) || defined(__DOXYGEN__)
+#define HAL_USE_I2S                 FALSE
+#endif
+
+/**
+ * @brief   Enables the ICU subsystem.
+ */
+#if !defined(HAL_USE_ICU) || defined(__DOXYGEN__)
+#define HAL_USE_ICU                 FALSE
+#endif
+
+/**
+ * @brief   Enables the MAC subsystem.
+ */
+#if !defined(HAL_USE_MAC) || defined(__DOXYGEN__)
+#define HAL_USE_MAC                 FALSE
+#endif
+
+/**
+ * @brief   Enables the MMC_SPI subsystem.
+ */
+#if !defined(HAL_USE_MMC_SPI) || defined(__DOXYGEN__)
+#define HAL_USE_MMC_SPI             FALSE
+#endif
+
+/**
+ * @brief   Enables the PWM subsystem.
+ */
+#if !defined(HAL_USE_PWM) || defined(__DOXYGEN__)
+#define HAL_USE_PWM                 FALSE
+#endif
+
+/**
+ * @brief   Enables the RTC subsystem.
+ */
+#if !defined(HAL_USE_RTC) || defined(__DOXYGEN__)
+#define HAL_USE_RTC                 FALSE
+#endif
+
+/**
+ * @brief   Enables the SDC subsystem.
+ */
+#if !defined(HAL_USE_SDC) || defined(__DOXYGEN__)
+#define HAL_USE_SDC                 FALSE
+#endif
+
+/**
+ * @brief   Enables the SERIAL subsystem.
+ */
+#if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
+#define HAL_USE_SERIAL              FALSE
+#endif
+
+/**
+ * @brief   Enables the SERIAL over USB subsystem.
+ */
+#if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__)
+#define HAL_USE_SERIAL_USB          FALSE
+#endif
+
+/**
+ * @brief   Enables the SPI subsystem.
+ */
+#if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
+#define HAL_USE_SPI                 FALSE
+#endif
+
+/**
+ * @brief   Enables the UART subsystem.
+ */
+#if !defined(HAL_USE_UART) || defined(__DOXYGEN__)
+#define HAL_USE_UART                FALSE
+#endif
+
+/**
+ * @brief   Enables the USB subsystem.
+ */
+#if !defined(HAL_USE_USB) || defined(__DOXYGEN__)
+#define HAL_USE_USB                 TRUE
+#endif
+
+/**
+ * @brief   Enables the WDG subsystem.
+ */
+#if !defined(HAL_USE_WDG) || defined(__DOXYGEN__)
+#define HAL_USE_WDG                 FALSE
+#endif
+
+/*===========================================================================*/
+/* ADC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
+#define ADC_USE_WAIT                TRUE
+#endif
+
+/**
+ * @brief   Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define ADC_USE_MUTUAL_EXCLUSION    TRUE
+#endif
+
+/*===========================================================================*/
+/* CAN driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Sleep mode related APIs inclusion switch.
+ */
+#if !defined(CAN_USE_SLEEP_MODE) || defined(__DOXYGEN__)
+#define CAN_USE_SLEEP_MODE          TRUE
+#endif
+
+/*===========================================================================*/
+/* I2C driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables the mutual exclusion APIs on the I2C bus.
+ */
+#if !defined(I2C_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define I2C_USE_MUTUAL_EXCLUSION    TRUE
+#endif
+
+/*===========================================================================*/
+/* MAC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables an event sources for incoming packets.
+ */
+#if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__)
+#define MAC_USE_ZERO_COPY           FALSE
+#endif
+
+/**
+ * @brief   Enables an event sources for incoming packets.
+ */
+#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__)
+#define MAC_USE_EVENTS              TRUE
+#endif
+
+/*===========================================================================*/
+/* MMC_SPI driver related settings.                                          */
+/*===========================================================================*/
+
+/**
+ * @brief   Delays insertions.
+ * @details If enabled this options inserts delays into the MMC waiting
+ *          routines releasing some extra CPU time for the threads with
+ *          lower priority, this may slow down the driver a bit however.
+ *          This option is recommended also if the SPI driver does not
+ *          use a DMA channel and heavily loads the CPU.
+ */
+#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__)
+#define MMC_NICE_WAITING            TRUE
+#endif
+
+/*===========================================================================*/
+/* SDC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Number of initialization attempts before rejecting the card.
+ * @note    Attempts are performed at 10mS intervals.
+ */
+#if !defined(SDC_INIT_RETRY) || defined(__DOXYGEN__)
+#define SDC_INIT_RETRY              100
+#endif
+
+/**
+ * @brief   Include support for MMC cards.
+ * @note    MMC support is not yet implemented so this option must be kept
+ *          at @p FALSE.
+ */
+#if !defined(SDC_MMC_SUPPORT) || defined(__DOXYGEN__)
+#define SDC_MMC_SUPPORT             FALSE
+#endif
+
+/**
+ * @brief   Delays insertions.
+ * @details If enabled this options inserts delays into the MMC waiting
+ *          routines releasing some extra CPU time for the threads with
+ *          lower priority, this may slow down the driver a bit however.
+ */
+#if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__)
+#define SDC_NICE_WAITING            TRUE
+#endif
+
+/*===========================================================================*/
+/* SERIAL driver related settings.                                           */
+/*===========================================================================*/
+
+/**
+ * @brief   Default bit rate.
+ * @details Configuration parameter, this is the baud rate selected for the
+ *          default configuration.
+ */
+#if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__)
+#define SERIAL_DEFAULT_BITRATE      38400
+#endif
+
+/**
+ * @brief   Serial buffers size.
+ * @details Configuration parameter, you can change the depth of the queue
+ *          buffers depending on the requirements of your application.
+ * @note    The default is 64 bytes for both the transmission and receive
+ *          buffers.
+ */
+#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#define SERIAL_BUFFERS_SIZE         16
+#endif
+
+/*===========================================================================*/
+/* SERIAL_USB driver related setting.                                        */
+/*===========================================================================*/
+
+/**
+ * @brief   Serial over USB buffers size.
+ * @details Configuration parameter, the buffer size must be a multiple of
+ *          the USB data endpoint maximum packet size.
+ * @note    The default is 64 bytes for both the transmission and receive
+ *          buffers.
+ */
+#if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#define SERIAL_USB_BUFFERS_SIZE     1
+#endif
+
+/*===========================================================================*/
+/* SPI driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_USE_WAIT) || defined(__DOXYGEN__)
+#define SPI_USE_WAIT                TRUE
+#endif
+
+/**
+ * @brief   Enables the @p spiAcquireBus() and @p spiReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define SPI_USE_MUTUAL_EXCLUSION    TRUE
+#endif
+
+/*===========================================================================*/
+/* USB driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(USB_USE_WAIT) || defined(__DOXYGEN__)
+#define USB_USE_WAIT                TRUE
+#endif
+
+#endif /* _HALCONF_H_ */
+
+/** @} */
diff --git a/keyboards/retro_75/info.json b/keyboards/retro_75/info.json
new file mode 100644
index 000000000..6a6253c37
--- /dev/null
+++ b/keyboards/retro_75/info.json
@@ -0,0 +1,15 @@
+{
+    "keyboard_name": "Retro75", 
+    "url": "", 
+    "maintainer": "zvecr", 
+    "width": 16, 
+    "height": 6.25, 
+    "layouts": {
+        "LAYOUT": {
+            "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":1.5, "y":0}, {"label":"F2", "x":2.5, "y":0}, {"label":"F3", "x":3.5, "y":0}, {"label":"F4", "x":4.5, "y":0}, {"label":"F5", "x":6, "y":0}, {"label":"F6", "x":7, "y":0}, {"label":"F7", "x":8, "y":0}, {"label":"F8", "x":9, "y":0}, {"label":"F9", "x":10.5, "y":0}, {"label":"F10", "x":11.5, "y":0}, {"label":"F11", "x":12.5, "y":0}, {"label":"F12", "x":13.5, "y":0}, {"label":"Prt Sc", "x":15, "y":0}, {"label":"~", "x":0, "y":1.25}, {"label":"!", "x":1, "y":1.25}, {"label":"@", "x":2, "y":1.25}, {"label":"#", "x":3, "y":1.25}, {"label":"$", "x":4, "y":1.25}, {"label":"%", "x":5, "y":1.25}, {"label":"^", "x":6, "y":1.25}, {"label":"&", "x":7, "y":1.25}, {"label":"*", "x":8, "y":1.25}, {"label":"(", "x":9, "y":1.25}, {"label":")", "x":10, "y":1.25}, {"label":"_", "x":11, "y":1.25}, {"label":"+", "x":12, "y":1.25}, {"x":13, "y":1.25, "w":2}, {"label":"Delete", "x":15, "y":1.25}, {"label":"Tab", "x":0, "y":2.25, "w":1.5}, {"label":"Q", "x":1.5, "y":2.25}, {"label":"W", "x":2.5, "y":2.25}, {"label":"E", "x":3.5, "y":2.25}, {"label":"R", "x":4.5, "y":2.25}, {"label":"T", "x":5.5, "y":2.25}, {"label":"Y", "x":6.5, "y":2.25}, {"label":"U", "x":7.5, "y":2.25}, {"label":"I", "x":8.5, "y":2.25}, {"label":"O", "x":9.5, "y":2.25}, {"label":"P", "x":10.5, "y":2.25}, {"label":"{", "x":11.5, "y":2.25}, {"label":"}", "x":12.5, "y":2.25}, {"label":"|", "x":13.5, "y":2.25, "w":1.5}, {"label":"Page Up", "x":15, "y":2.25}, {"label":"Caps Lock", "x":0, "y":3.25, "w":1.75}, {"label":"A", "x":1.75, "y":3.25}, {"label":"S", "x":2.75, "y":3.25}, {"label":"D", "x":3.75, "y":3.25}, {"label":"F", "x":4.75, "y":3.25}, {"label":"G", "x":5.75, "y":3.25}, {"label":"H", "x":6.75, "y":3.25}, {"label":"J", "x":7.75, "y":3.25}, {"label":"K", "x":8.75, "y":3.25}, {"label":"L", "x":9.75, "y":3.25}, {"label":":", "x":10.75, "y":3.25}, {"label":"\"", "x":11.75, "y":3.25}, {"label":"Enter", "x":12.75, "y":3.25, "w":2.25}, {"label":"Page Down", "x":15, "y":3.25}, {"label":"Shift", "x":0, "y":4.25, "w":2.25}, {"label":"Z", "x":2.25, "y":4.25}, {"label":"X", "x":3.25, "y":4.25}, {"label":"C", "x":4.25, "y":4.25}, {"label":"V", "x":5.25, "y":4.25}, {"label":"B", "x":6.25, "y":4.25}, {"label":"N", "x":7.25, "y":4.25}, {"label":"M", "x":8.25, "y":4.25}, {"label":"<", "x":9.25, "y":4.25}, {"label":">", "x":10.25, "y":4.25}, {"label":"?", "x":11.25, "y":4.25}, {"label":"Shift", "x":12.25, "y":4.25, "w":1.75}, {"label":"\u2191", "x":14, "y":4.25}, {"label":"Fn", "x":15, "y":4.25}, {"label":"Ctrl", "x":0, "y":5.25, "w":1.5}, {"label":"Alt", "x":2.25, "y":5.25, "w":1.5}, {"x":3.75, "y":5.25, "w":7}, {"label":"Alt", "x":10.75, "y":5.25, "w":1.5}, {"label":"\u2190", "x":13, "y":5.25}, {"label":"\u2193", "x":14, "y":5.25}, {"label":"\u2192", "x":15, "y":5.25}]
+        },
+        "LAYOUT_split_bs": {
+            "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":1.5, "y":0}, {"label":"F2", "x":2.5, "y":0}, {"label":"F3", "x":3.5, "y":0}, {"label":"F4", "x":4.5, "y":0}, {"label":"F5", "x":6, "y":0}, {"label":"F6", "x":7, "y":0}, {"label":"F7", "x":8, "y":0}, {"label":"F8", "x":9, "y":0}, {"label":"F9", "x":10.5, "y":0}, {"label":"F10", "x":11.5, "y":0}, {"label":"F11", "x":12.5, "y":0}, {"label":"F12", "x":13.5, "y":0}, {"label":"Prt Sc", "x":15, "y":0}, {"label":"~", "x":0, "y":1.25}, {"label":"!", "x":1, "y":1.25}, {"label":"@", "x":2, "y":1.25}, {"label":"#", "x":3, "y":1.25}, {"label":"$", "x":4, "y":1.25}, {"label":"%", "x":5, "y":1.25}, {"label":"^", "x":6, "y":1.25}, {"label":"&", "x":7, "y":1.25}, {"label":"*", "x":8, "y":1.25}, {"label":"(", "x":9, "y":1.25}, {"label":")", "x":10, "y":1.25}, {"label":"_", "x":11, "y":1.25}, {"label":"+", "x":12, "y":1.25}, {"x":13, "y":1.25}, {"x":14, "y":1.25}, {"label":"Delete", "x":15, "y":1.25}, {"label":"Tab", "x":0, "y":2.25, "w":1.5}, {"label":"Q", "x":1.5, "y":2.25}, {"label":"W", "x":2.5, "y":2.25}, {"label":"E", "x":3.5, "y":2.25}, {"label":"R", "x":4.5, "y":2.25}, {"label":"T", "x":5.5, "y":2.25}, {"label":"Y", "x":6.5, "y":2.25}, {"label":"U", "x":7.5, "y":2.25}, {"label":"I", "x":8.5, "y":2.25}, {"label":"O", "x":9.5, "y":2.25}, {"label":"P", "x":10.5, "y":2.25}, {"label":"{", "x":11.5, "y":2.25}, {"label":"}", "x":12.5, "y":2.25}, {"label":"|", "x":13.5, "y":2.25, "w":1.5}, {"label":"Page Up", "x":15, "y":2.25}, {"label":"Caps Lock", "x":0, "y":3.25, "w":1.75}, {"label":"A", "x":1.75, "y":3.25}, {"label":"S", "x":2.75, "y":3.25}, {"label":"D", "x":3.75, "y":3.25}, {"label":"F", "x":4.75, "y":3.25}, {"label":"G", "x":5.75, "y":3.25}, {"label":"H", "x":6.75, "y":3.25}, {"label":"J", "x":7.75, "y":3.25}, {"label":"K", "x":8.75, "y":3.25}, {"label":"L", "x":9.75, "y":3.25}, {"label":":", "x":10.75, "y":3.25}, {"label":"\"", "x":11.75, "y":3.25}, {"label":"Enter", "x":12.75, "y":3.25, "w":2.25}, {"label":"Page Down", "x":15, "y":3.25}, {"label":"Shift", "x":0, "y":4.25, "w":2.25}, {"label":"Z", "x":2.25, "y":4.25}, {"label":"X", "x":3.25, "y":4.25}, {"label":"C", "x":4.25, "y":4.25}, {"label":"V", "x":5.25, "y":4.25}, {"label":"B", "x":6.25, "y":4.25}, {"label":"N", "x":7.25, "y":4.25}, {"label":"M", "x":8.25, "y":4.25}, {"label":"<", "x":9.25, "y":4.25}, {"label":">", "x":10.25, "y":4.25}, {"label":"?", "x":11.25, "y":4.25}, {"label":"Shift", "x":12.25, "y":4.25, "w":1.75}, {"label":"\u2191", "x":14, "y":4.25}, {"label":"Fn", "x":15, "y":4.25}, {"label":"Ctrl", "x":0, "y":5.25, "w":1.5}, {"label":"Alt", "x":2.25, "y":5.25, "w":1.5}, {"x":3.75, "y":5.25, "w":7}, {"label":"Alt", "x":10.75, "y":5.25, "w":1.5}, {"label":"\u2190", "x":13, "y":5.25}, {"label":"\u2193", "x":14, "y":5.25}, {"label":"\u2192", "x":15, "y":5.25}]
+        }
+    }
+}
\ No newline at end of file
diff --git a/keyboards/retro_75/keymaps/default/keymap.c b/keyboards/retro_75/keymaps/default/keymap.c
new file mode 100644
index 000000000..602eb695b
--- /dev/null
+++ b/keyboards/retro_75/keymaps/default/keymap.c
@@ -0,0 +1,22 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT(
+    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_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_DEL,
+    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,    MO(1),
+    KC_LCTL,  KC_LALT,                                KC_SPC,                                 KC_RALT,  KC_LEFT,  KC_DOWN,  KC_RGHT
+  ),
+
+  [1] = LAYOUT(
+    RESET,    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+    _______,  RGB_TOG,  RGB_MOD,  RGB_HUI,  RGB_HUD,  RGB_SAI,  RGB_SAD,  RGB_VAI,  RGB_VAD,  _______,  _______,  _______,  _______,  _______,            _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,                      _______,  _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,            _______,  _______,
+    _______,  _______,                                _______,                                _______,  _______,  _______,  _______
+  ),
+};
diff --git a/keyboards/retro_75/keymaps/split_backspace/keymap.c b/keyboards/retro_75/keymaps/split_backspace/keymap.c
new file mode 100644
index 000000000..58993b8bb
--- /dev/null
+++ b/keyboards/retro_75/keymaps/split_backspace/keymap.c
@@ -0,0 +1,22 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT_split_bs(
+    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_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_BSPC,  KC_DEL,
+    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,    MO(1),
+    KC_LCTL,  KC_LALT,                                KC_SPC,                                 KC_RALT,  KC_LEFT,  KC_DOWN,  KC_RGHT
+  ),
+
+  [1] = LAYOUT_split_bs(
+    RESET,    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,
+    _______,  RGB_TOG,  RGB_MOD,  RGB_HUI,  RGB_HUD,  RGB_SAI,  RGB_SAD,  RGB_VAI,  RGB_VAD,  _______,  _______,  _______,  _______,  _______,            _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,                      _______,  _______,
+    _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,  _______,            _______,  _______,
+    _______,  _______,                                _______,                                _______,  _______,  _______,  _______
+  ),
+};
diff --git a/keyboards/retro_75/mcuconf.h b/keyboards/retro_75/mcuconf.h
new file mode 100644
index 000000000..faca3defd
--- /dev/null
+++ b/keyboards/retro_75/mcuconf.h
@@ -0,0 +1,171 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef _MCUCONF_H_
+#define _MCUCONF_H_
+
+/*
+ * STM32F0xx drivers configuration.
+ * The following settings override the default settings present in
+ * the various device driver implementation headers.
+ * Note that the settings for each driver only have effect if the whole
+ * driver is enabled in halconf.h.
+ *
+ * IRQ priorities:
+ * 3...0       Lowest...Highest.
+ *
+ * DMA priorities:
+ * 0...3        Lowest...Highest.
+ */
+
+#define STM32F0xx_MCUCONF
+
+/*
+ * HAL driver system settings.
+ */
+#define STM32_NO_INIT                       FALSE
+#define STM32_PVD_ENABLE                    FALSE
+#define STM32_PLS                           STM32_PLS_LEV0
+#define STM32_HSI_ENABLED                   TRUE
+#define STM32_HSI14_ENABLED                 TRUE
+#define STM32_HSI48_ENABLED                 FALSE
+#define STM32_LSI_ENABLED                   TRUE
+#define STM32_HSE_ENABLED                   FALSE
+#define STM32_LSE_ENABLED                   FALSE
+#define STM32_SW                            STM32_SW_PLL
+#define STM32_PLLSRC                        STM32_PLLSRC_HSI_DIV2
+#define STM32_PREDIV_VALUE                  1
+#define STM32_PLLMUL_VALUE                  12
+#define STM32_HPRE                          STM32_HPRE_DIV1
+#define STM32_PPRE                          STM32_PPRE_DIV1
+#define STM32_ADCSW                         STM32_ADCSW_HSI14
+#define STM32_ADCPRE                        STM32_ADCPRE_DIV4
+#define STM32_MCOSEL                        STM32_MCOSEL_NOCLOCK
+#define STM32_ADCPRE                        STM32_ADCPRE_DIV4
+#define STM32_ADCSW                         STM32_ADCSW_HSI14
+#define STM32_USBSW                         STM32_USBSW_HSI48
+#define STM32_CECSW                         STM32_CECSW_HSI
+#define STM32_I2C1SW                        STM32_I2C1SW_HSI
+#define STM32_USART1SW                      STM32_USART1SW_PCLK
+#define STM32_RTCSEL                        STM32_RTCSEL_LSI
+
+/*
+ * ADC driver system settings.
+ */
+#define STM32_ADC_USE_ADC1                  FALSE
+#define STM32_ADC_ADC1_DMA_PRIORITY         2
+#define STM32_ADC_IRQ_PRIORITY              2
+#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY     2
+
+/*
+ * EXT driver system settings.
+ */
+#define STM32_EXT_EXTI0_1_IRQ_PRIORITY      3
+#define STM32_EXT_EXTI2_3_IRQ_PRIORITY      3
+#define STM32_EXT_EXTI4_15_IRQ_PRIORITY     3
+#define STM32_EXT_EXTI16_IRQ_PRIORITY       3
+#define STM32_EXT_EXTI17_IRQ_PRIORITY       3
+
+/*
+ * GPT driver system settings.
+ */
+#define STM32_GPT_USE_TIM1                  FALSE
+#define STM32_GPT_USE_TIM2                  FALSE
+#define STM32_GPT_USE_TIM3                  FALSE
+#define STM32_GPT_USE_TIM14                 FALSE
+#define STM32_GPT_TIM1_IRQ_PRIORITY         2
+#define STM32_GPT_TIM2_IRQ_PRIORITY         2
+#define STM32_GPT_TIM3_IRQ_PRIORITY         2
+#define STM32_GPT_TIM14_IRQ_PRIORITY        2
+
+/*
+ * I2C driver system settings.
+ */
+#define STM32_I2C_USE_I2C1                  FALSE
+#define STM32_I2C_USE_I2C2                  FALSE
+#define STM32_I2C_BUSY_TIMEOUT              50
+#define STM32_I2C_I2C1_IRQ_PRIORITY         3
+#define STM32_I2C_I2C2_IRQ_PRIORITY         3
+#define STM32_I2C_USE_DMA                   TRUE
+#define STM32_I2C_I2C1_DMA_PRIORITY         1
+#define STM32_I2C_I2C2_DMA_PRIORITY         1
+#define STM32_I2C_DMA_ERROR_HOOK(i2cp)      osalSysHalt("DMA failure")
+
+/*
+ * ICU driver system settings.
+ */
+#define STM32_ICU_USE_TIM1                  FALSE
+#define STM32_ICU_USE_TIM2                  FALSE
+#define STM32_ICU_USE_TIM3                  FALSE
+#define STM32_ICU_TIM1_IRQ_PRIORITY         3
+#define STM32_ICU_TIM2_IRQ_PRIORITY         3
+#define STM32_ICU_TIM3_IRQ_PRIORITY         3
+
+/*
+ * PWM driver system settings.
+ */
+#define STM32_PWM_USE_ADVANCED              FALSE
+#define STM32_PWM_USE_TIM1                  FALSE
+#define STM32_PWM_USE_TIM2                  FALSE
+#define STM32_PWM_USE_TIM3                  FALSE
+#define STM32_PWM_TIM1_IRQ_PRIORITY         3
+#define STM32_PWM_TIM2_IRQ_PRIORITY         3
+#define STM32_PWM_TIM3_IRQ_PRIORITY         3
+
+/*
+ * SERIAL driver system settings.
+ */
+#define STM32_SERIAL_USE_USART1             FALSE
+#define STM32_SERIAL_USE_USART2             FALSE
+#define STM32_SERIAL_USART1_PRIORITY        3
+#define STM32_SERIAL_USART2_PRIORITY        3
+
+/*
+ * SPI driver system settings.
+ */
+#define STM32_SPI_USE_SPI1                  FALSE
+#define STM32_SPI_USE_SPI2                  FALSE
+#define STM32_SPI_SPI1_DMA_PRIORITY         1
+#define STM32_SPI_SPI2_DMA_PRIORITY         1
+#define STM32_SPI_SPI1_IRQ_PRIORITY         2
+#define STM32_SPI_SPI2_IRQ_PRIORITY         2
+#define STM32_SPI_DMA_ERROR_HOOK(spip)      osalSysHalt("DMA failure")
+
+/*
+ * ST driver system settings.
+ */
+#define STM32_ST_IRQ_PRIORITY               2
+#define STM32_ST_USE_TIMER                  2
+
+/*
+ * UART driver system settings.
+ */
+#define STM32_UART_USE_USART1               FALSE
+#define STM32_UART_USE_USART2               FALSE
+#define STM32_UART_USART1_IRQ_PRIORITY      3
+#define STM32_UART_USART2_IRQ_PRIORITY      3
+#define STM32_UART_USART1_DMA_PRIORITY      0
+#define STM32_UART_USART2_DMA_PRIORITY      0
+#define STM32_UART_DMA_ERROR_HOOK(uartp)    osalSysHalt("DMA failure")
+
+/*
+ * USB driver system settings.
+ */
+#define STM32_USB_USE_USB1                  TRUE
+#define STM32_USB_LOW_POWER_ON_SUSPEND      FALSE
+#define STM32_USB_USB1_LP_IRQ_PRIORITY      3
+
+#endif /* _MCUCONF_H_ */
diff --git a/keyboards/retro_75/readme.md b/keyboards/retro_75/readme.md
new file mode 100644
index 000000000..0eb0afff3
--- /dev/null
+++ b/keyboards/retro_75/readme.md
@@ -0,0 +1,15 @@
+# Retro75
+
+![Retro75](https://i.imgur.com/spS7PHo.jpg)
+
+A 75% ARM STM32F072 keyboard, with WS2812 LEDs.
+
+* Keyboard Maintainer: [zvecr](https://github.com/zvecr)
+* Hardware Supported: Retro75 PCB
+* Hardware Availability: Private Group-Buy
+
+Make example for this keyboard (after setting up your build environment):
+
+    make retro_75:default
+
+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/retro_75/retro_75.c b/keyboards/retro_75/retro_75.c
new file mode 100644
index 000000000..d47def372
--- /dev/null
+++ b/keyboards/retro_75/retro_75.c
@@ -0,0 +1 @@
+#include "retro_75.h"
diff --git a/keyboards/retro_75/retro_75.h b/keyboards/retro_75/retro_75.h
new file mode 100644
index 000000000..7a7d10e42
--- /dev/null
+++ b/keyboards/retro_75/retro_75.h
@@ -0,0 +1,61 @@
+/* Copyright 2019 zvecr<git@zvecr.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/>.
+ */
+#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( \
+    K000, K002, K003, K004, K005, K006, K007, K008, K009, K011, K012, K013, K014, K015, \
+    K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K115, \
+    K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K215, \
+    K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K315, \
+    K400, K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, K415, \
+    K500, K501,                   K505,                   K509,       K511, K512, K515  \
+) \
+{ \
+    { K000, ____, K002, K003, K004, K005, K006, K007, K008, K009, ____, K011, K012, K013, K014, K015}, \
+    { K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, ____, K115}, \
+    { K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, ____, K215}, \
+    { K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, ____, ____, K315}, \
+    { K400, K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, ____, ____, K415}, \
+    { K500, K501, ____, ____, ____, K505, ____, ____, ____, K509, ____, K511, K512, ____, ____, K515}, \
+}
+
+#define LAYOUT_split_bs( \
+    K000, K002, K003, K004, K005, K006, K007, K008, K009, K011, K012, K013, K014, K015, \
+    K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115, \
+    K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, K215, \
+    K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, K315, \
+    K400, K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, K415, \
+    K500, K501,                   K505,                   K509,       K511, K512, K515  \
+) \
+{ \
+    { K000, ____, K002, K003, K004, K005, K006, K007, K008, K009, ____, K011, K012, K013, K014, K015}, \
+    { K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, K112, K113, K114, K115}, \
+    { K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, K212, K213, ____, K215}, \
+    { K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311, K312, ____, ____, K315}, \
+    { K400, K401, K402, K403, K404, K405, K406, K407, K408, K409, K410, K411, K412, ____, ____, K415}, \
+    { K500, K501, ____, ____, ____, K505, ____, ____, ____, K509, ____, K511, K512, ____, ____, K515}, \
+}
diff --git a/keyboards/retro_75/rules.mk b/keyboards/retro_75/rules.mk
new file mode 100644
index 000000000..82a2cfb06
--- /dev/null
+++ b/keyboards/retro_75/rules.mk
@@ -0,0 +1,54 @@
+## chip/board settings
+# the next two should match the directories in
+#  <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+MCU_FAMILY = STM32
+MCU_SERIES = STM32F0xx
+# linker script to use
+# it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+#  or <this_dir>/ld/
+MCU_LDSCRIPT = STM32F072xB
+# startup code to use
+# is should exist in <chibios>/os/common/ports/ARMCMx/compilers/GCC/mk/
+MCU_STARTUP = stm32f0xx
+# it should exist either in <chibios>/os/hal/boards/
+#  or <this_dir>/boards
+BOARD = ST_STM32F072B_DISCOVERY
+# Cortex version
+# Teensy LC is cortex-m0; Teensy 3.x are cortex-m4
+MCU  = cortex-m0
+# ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+ARMV = 6
+# If you want to be able to jump to bootloader from firmware on STM32 MCUs,
+# set the correct BOOTLOADER_ADDRESS. Either set it here, or define it in
+# ./bootloader_defs.h or in ./boards/<FOO>/bootloader_defs.h (if you have
+# a custom board definition that you plan to reuse).
+# If you're not setting it here, leave it commented out.
+# It is chip dependent, the correct number can be looked up here (page 175):
+# http://www.st.com/web/en/resource/technical/document/application_note/CD00167594.pdf
+# This also requires a patch to chibios:
+#   <tmk_dir>/tmk_core/tool/chibios/ch-bootloader-jump.patch
+#STM32_BOOTLOADER_ADDRESS = 0x1FFFC800
+
+# Options to pass to dfu-util when flashing
+DFU_ARGS = -d 0483:df11 -a 0 -s 0x08000000:leave
+DFU_SUFFIX_ARGS = -p df11 -v 0483
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no        # Console for debug
+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
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support
+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