Split up pins to make it more manageable

Hopefully this is helpful to organization and future expansion….

Marlin/pins_ULTIMAKER_OLD.h

@@ -0,0 +1,62 @@
+/**
+ * Ultimaker pin assignments (Old electronics)
+ */
+
+#if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
+  #error Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu.
+#endif
+
+#define LARGE_FLASH true
+
+#define X_STEP_PIN 25
+#define X_DIR_PIN 23
+#define X_MIN_PIN 15
+#define X_MAX_PIN 14
+#define X_ENABLE_PIN 27
+
+#define Y_STEP_PIN 31
+#define Y_DIR_PIN 33
+#define Y_MIN_PIN 17
+#define Y_MAX_PIN 16
+#define Y_ENABLE_PIN 29
+
+#define Z_STEP_PIN 37
+#define Z_DIR_PIN 39
+#define Z_MIN_PIN 19
+#define Z_MAX_PIN 18
+#define Z_ENABLE_PIN 35
+
+#define HEATER_BED_PIN -1
+#define TEMP_BED_PIN -1
+
+#define HEATER_0_PIN  2
+#define TEMP_0_PIN 8
+
+#define HEATER_1_PIN 1
+#define TEMP_1_PIN 1
+
+#define HEATER_2_PIN -1
+#define TEMP_2_PIN -1
+
+#define E0_STEP_PIN         43
+#define E0_DIR_PIN          45
+#define E0_ENABLE_PIN       41
+
+#define E1_STEP_PIN         -1
+#define E1_DIR_PIN          -1
+#define E1_ENABLE_PIN       -1
+
+#define SDPOWER            -1
+#define SDSS               -1
+#define LED_PIN            -1
+#define FAN_PIN            -1
+#define PS_ON_PIN          -1
+#define KILL_PIN           -1
+#define SUICIDE_PIN        -1  //PIN that has to be turned on right after start, to keep power flowing.
+
+#define LCD_PINS_RS 24
+#define LCD_PINS_ENABLE 22
+#define LCD_PINS_D4 36
+#define LCD_PINS_D5 34
+#define LCD_PINS_D6 32
+#define LCD_PINS_D7 30