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diff --git a/Marlin/src/pins/ramps/pins_RAMPS_S_12.h b/Marlin/src/pins/ramps/pins_RAMPS_S_12.h
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+++ b/Marlin/src/pins/ramps/pins_RAMPS_S_12.h
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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 3 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Arduino Mega with RAMPS-S v1.2 by Sakul.cz pin assignments
+ * Written by Michal Rábek <rabek33@gmail.com>
+ *
+ * Applies to the following boards:
+ *
+ *  BOARD_RAMPS_S_12_EEFB  Ramps S 1.2 (Hotend0, Hotend1, Fan, Bed)
+ *  BOARD_RAMPS_S_12_EEEB  Ramps S 1.2 (Hotend0, Hotend1, Hotend2, Bed)
+ *  BOARD_RAMPS_S_12_EFFB  Ramps S 1.2 (Hotend, Fan0, Fan1, Bed)
+ *
+ * Other pins_MYBOARD.h files may override these defaults
+ */
+
+#if NOT_TARGET(__AVR_ATmega1280__, __AVR_ATmega2560__)
+  #error "Oops! Select 'Arduino/Genuino Mega or Mega 2560' in 'Tools > Board.'"
+#endif
+
+// Custom flags and defines for the build
+//#define BOARD_CUSTOM_BUILD_FLAGS -D__FOO__
+
+#ifndef BOARD_INFO_NAME
+  #define BOARD_INFO_NAME "RAMPS S 1.2"
+#endif
+
+//
+// Servos
+//
+#ifndef SERVO0_PIN
+  #define SERVO0_PIN                          10
+#endif
+#ifndef SERVO1_PIN
+  #define SERVO1_PIN                          11
+#endif
+#ifndef SERVO2_PIN
+  #define SERVO2_PIN                          12
+#endif
+#ifndef SERVO3_PIN
+  #define SERVO3_PIN                          44
+#endif
+
+//
+// Limit Switches
+//
+#ifndef X_STOP_PIN
+  #ifndef X_MIN_PIN
+    #define X_MIN_PIN                         37
+  #endif
+  #ifndef X_MAX_PIN
+    #define X_MAX_PIN                         36
+  #endif
+#endif
+#ifndef Y_STOP_PIN
+  #ifndef Y_MIN_PIN
+    #define Y_MIN_PIN                         35
+  #endif
+  #ifndef Y_MAX_PIN
+    #define Y_MAX_PIN                         34
+  #endif
+#endif
+#ifndef Z_STOP_PIN
+  #ifndef Z_MIN_PIN
+    #define Z_MIN_PIN                         33
+  #endif
+  #ifndef Z_MAX_PIN
+    #define Z_MAX_PIN                         32
+  #endif
+#endif
+
+//
+// Z Probe (when not Z_MIN_PIN)
+//
+#ifndef Z_MIN_PROBE_PIN
+  #define Z_MIN_PROBE_PIN                      5
+#endif
+
+//
+// Filament Runout Sensor
+//
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN                      44  // RAMPS_S S3 on the servos connector
+#endif
+
+//
+// Steppers
+//
+#define X_STEP_PIN                            17
+#define X_DIR_PIN                             16
+#define X_ENABLE_PIN                          48
+
+#define Y_STEP_PIN                            54
+#define Y_DIR_PIN                             47
+#define Y_ENABLE_PIN                          55
+
+#ifndef Z_STEP_PIN
+  #define Z_STEP_PIN                          57
+#endif
+#define Z_DIR_PIN                             56
+#define Z_ENABLE_PIN                          62
+
+#define E0_STEP_PIN                           23
+#define E0_DIR_PIN                            22
+#define E0_ENABLE_PIN                         24
+
+#define E1_STEP_PIN                           26
+#define E1_DIR_PIN                            25
+#define E1_ENABLE_PIN                         27
+
+#define E2_STEP_PIN                           29
+#define E2_DIR_PIN                            28
+#define E2_ENABLE_PIN                         39
+
+//
+// Temperature Sensors
+//
+#ifndef TEMP_0_PIN
+  #define TEMP_0_PIN                          15  // Analog Input
+#endif
+#ifndef TEMP_1_PIN
+  #define TEMP_1_PIN                          14  // Analog Input
+#endif
+#ifndef TEMP_2_PIN
+  #define TEMP_2_PIN                          13  // Analog Input
+#endif
+#ifndef TEMP_3_PIN
+  #define TEMP_3_PIN                          12  // Analog Input
+#endif
+#ifndef TEMP_BED_PIN
+  #define TEMP_BED_PIN                        11  // Analog Input
+#endif
+
+//
+// Heaters / Fans
+//
+#ifndef MOSFET_D_PIN
+  #define MOSFET_D_PIN                        -1
+#endif
+#ifndef RAMPS_S_HE_0
+  #define RAMPS_S_HE_0                         2
+#endif
+#ifndef RAMPS_S_HE_1
+  #define RAMPS_S_HE_1                         3
+#endif
+#ifndef RAMPS_S_HE_2
+  #define RAMPS_S_HE_2                         6
+#endif
+
+#define HEATER_BED_PIN                         9
+
+#define HEATER_0_PIN                RAMPS_S_HE_0
+
+#if MB(RAMPS_S_12_EEFB)                           // Hotend0, Hotend1, Fan, Bed
+  #define HEATER_1_PIN              RAMPS_S_HE_1
+  #define FAN_PIN                   RAMPS_S_HE_2
+#elif MB(RAMPS_S_12_EEEB)                         // Hotend0, Hotend1, Hotend2, Bed
+  #define HEATER_1_PIN              RAMPS_S_HE_1
+  #define HEATER_2_PIN              RAMPS_S_HE_2
+#elif MB(RAMPS_S_12_EFFB)                         // Hotend, Fan0, Fan1, Bed
+  #define FAN_PIN                   RAMPS_S_HE_1
+  #define FAN1_PIN                  RAMPS_S_HE_2
+#endif
+
+//
+// Misc. Functions
+//
+#define SDSS                                  53
+#define LED_PIN                               13
+
+#ifndef KILL_PIN
+  #define KILL_PIN                            46
+#endif
+
+#ifndef FILWIDTH_PIN
+  #define FILWIDTH_PIN                        60  // Analog Input on EXTEND
+#endif
+
+#ifndef PS_ON_PIN
+  #define PS_ON_PIN                           12  // RAMPS_S S2 on the servos connector
+#endif
+
+#if ENABLED(CASE_LIGHT_ENABLE) && !defined(CASE_LIGHT_PIN) && !defined(SPINDLE_LASER_ENA_PIN)
+  #if NUM_SERVOS <= 1                             // Prefer the servo connector
+    #define CASE_LIGHT_PIN                    12  // Hardware PWM (RAMPS_S S1 on the servos connector)
+  #elif HAS_FREE_AUX2_PINS
+    #define CASE_LIGHT_PIN                    44  // Hardware PWM
+  #endif
+#endif
+
+//
+// M3/M4/M5 - Spindle/Laser Control
+//
+#if HAS_CUTTER && !defined(SPINDLE_LASER_ENA_PIN)
+  #define SPINDLE_LASER_ENA_PIN                4  // Pullup or pulldown!
+  #define SPINDLE_LASER_PWM_PIN                6  // Hardware PWM
+  #define SPINDLE_DIR_PIN                      5
+#endif
+
+//
+// TMC software SPI
+//
+#if ENABLED(TMC_USE_SW_SPI)
+  #ifndef TMC_SW_MOSI
+    #define TMC_SW_MOSI                       51
+  #endif
+  #ifndef TMC_SW_MISO
+    #define TMC_SW_MISO                       50
+  #endif
+  #ifndef TMC_SW_SCK
+    #define TMC_SW_SCK                        53
+  #endif
+#endif
+
+//
+// Průša i3 MK2 Multiplexer Support
+//
+#ifndef E_MUX0_PIN
+  #define E_MUX0_PIN                          29  // E2_STEP_PIN
+#endif
+#ifndef E_MUX1_PIN
+  #define E_MUX1_PIN                          28  // E2_DIR_PIN
+#endif
+#ifndef E_MUX2_PIN
+  #define E_MUX2_PIN                          39  // E2_ENABLE_PIN
+#endif
+
+//////////////////////////
+// LCDs and Controllers //
+//////////////////////////
+
+//
+// LCD Display output pins
+//
+#if HAS_WIRED_LCD
+  #define BEEPER_PIN                          45
+  #define LCD_PINS_RS                         19
+  #define LCD_PINS_ENABLE                     49
+  #define LCD_PINS_D4                         18
+  #define LCD_PINS_D5                         30
+  #define LCD_PINS_D6                         41
+  #define LCD_PINS_D7                         31
+  #ifndef SD_DETECT_PIN
+    #define SD_DETECT_PIN                     38
+  #endif
+
+  #if ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
+    #define BTN_ENC_EN               LCD_PINS_D7  // Detect the presence of the encoder
+  #endif
+
+#endif
+
+//
+// LCD Display input pins
+//
+#if IS_NEWPANEL
+  #define BTN_EN1                             40
+  #define BTN_EN2                             42
+  #define BTN_ENC                             43
+#endif