diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 4570e34e2c..537ff7a295 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -62,6 +62,7 @@
 // 81 = Printrboard (AT90USB1286)
 // 82 = Brainwave (AT90USB646)
 // 83 = SAV Mk-I (AT90USB1286)
+// 84 = Teensy++2.0 (AT90USB1286) // CLI compile: DEFINES=AT90USBxx_TEENSYPP_ASSIGNMENTS HARDWARE_MOTHERBOARD=84  make
 // 9  = Gen3+
 // 70 = Megatronics
 // 701= Megatronics v2.0
diff --git a/Marlin/pins.h b/Marlin/pins.h
index 14eff02ccb..c3644a086a 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -1650,6 +1650,10 @@
 #error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
 #endif
 
+#ifdef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin traditional.
+#error These Teensylu/Printrboard assignments depend on traditional Marlin assignments, not AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h
+#endif
+
 #define LARGE_FLASH        true
 
 #define X_STEP_PIN          0
@@ -1857,6 +1861,127 @@
 
 #endif  // MOTHERBOARD == 83
 
+/****************************************************************************************
+* Teensy++ 2.0 Breadboard pin assignments (AT90USB1286)
+* Requires the Teensyduino software with Teensy++ 2.0 selected in Arduino IDE!
+  http://www.pjrc.com/teensy/teensyduino.html
+* See http://reprap.org/wiki/Printrboard for more info
+* CLI build: DEFINES=AT90USBxx_TEENSYPP_ASSIGNMENTS HARDWARE_MOTHERBOARD=84  make
+* 
+****************************************************************************************/
+#if MOTHERBOARD == 84
+#define KNOWN_BOARD 1
+#define AT90USB 1286  // Disable MarlinSerial etc.
+
+#ifndef __AVR_AT90USB1286__
+#error Oops!  Make sure you have 'Teensy++ 2.0' selected from the 'Tools -> Boards' menu.
+#endif
+
+#define LARGE_FLASH        true
+
+/* 
+DaveX plan for Teensylu/printrboard-type pinouts (ref teensylu & sprinter) for a TeensyBreadboard:
+
+                               USB
+           GND       GND |-----#####-----| +5V              ATX +5SB
+     ATX PS_ON    PWM 27 |b7   #####   b6| 26    PWM*       Stepper Enable 
+                  PWM  0 |d0           b5| 25    PWM*        
+                  PWM  1 |d1           b4| 24    PWM        
+         X_MIN         2 |d2           b3| 23               MISO_PIN
+         Y_MIN         3 |d3           b2| 22               MOSI_PIN
+         Z_MIN         4 |d4  * *      b1| 21               SCK_PIN       
+                       5 |d5  e e      b0| 20               SDSS              
+                LED    6 |d6  5 4      e7| 19               
+                       7 |d7           e6| 18               
+       LCD  RS         8 |e0             | GND              
+       LCD  EN         9 |e1   a4 a0    R| AREF             
+       LCD  D4        10 |c0   a5 a1   f0| 38 A0            ENC_1           
+       LCD  D5        11 |c1   a6 a2   f1| 39 A1            ENC_2
+       LCD  D6        12 |c2   a7 a3   f2| 40 A2            ENC_CLK
+       LCD  D6        13 |c3           f3| 41 A3            
+      Bed Heat    PWM 14 |c4   V G R   f4| 42 A4            
+ Extruder Heat    PWM 15 |c5   c n S   f5| 43 A5            
+           Fan    PWM 16 |c6   c d T   f6| 44 A6            Bed TC
+                      17 |c7   * * *   f7| 45 A7            Extruder TC * 4.7k * +5        
+                         -----------------                  
+
+      Interior E4: 36, INT4
+      Interior E5: 37, INT5
+      Interior PA0-7: 28-35  -- Printrboard and Teensylu use these pins for step & direction:
+             T++ PA Signal  Marlin
+    
+       Z STEP  32 a4  a0 28 X STEP
+       Z DIR   33 a5  a1 29 X DIR
+       E STEP  34 a6  a2 30 Y STEP
+       E DIR   35 a7  a3 31 Y DIR
+
+*/
+
+#ifndef AT90USBxx_TEENSYPP_ASSIGNMENTS  // use Teensyduino Teensy++2.0 pin assignments instead of Marlin alphabetical.
+  #error  Uncomment #define AT90USBxx_TEENSYPP_ASSIGNMENTS in fastio.h for this config
+  // or build from command line with:  DEFINES=AT90USBxx_TEENSYPP_ASSIGNMENTS HARDWARE_MOTHERBOARD=84  make
+#endif
+
+#define X_STEP_PIN         28 //  0 Marlin
+#define X_DIR_PIN          29 //  1 Marlin
+#define X_ENABLE_PIN       26 
+
+#define Y_STEP_PIN         30 //  2 Marlin
+#define Y_DIR_PIN          31 //  3
+#define Y_ENABLE_PIN       26     // Shared w/x
+
+#define Z_STEP_PIN         32 //  4
+#define Z_DIR_PIN          33 //  5
+#define Z_ENABLE_PIN       26 // Shared w/x
+
+#define E0_STEP_PIN        34 //  6
+#define E0_DIR_PIN         35 //  7
+#define E0_ENABLE_PIN      26 // Shared w/x
+
+#define HEATER_0_PIN       15 //  21  // Extruder
+#define HEATER_1_PIN       -1
+#define HEATER_2_PIN       -1
+#define HEATER_BED_PIN     14 // 20  // Bed
+#define FAN_PIN            16 // 22  // Fan
+
+#define X_STOP_PIN          2
+#define Y_STOP_PIN          3
+#define Z_STOP_PIN          4
+
+#define TEMP_0_PIN          7 // Extruder / Analog pin numbering
+#define TEMP_BED_PIN        6 // Bed / Analog pin numbering
+#define TEMP_1_PIN         -1
+#define TEMP_2_PIN         -1
+
+#define SDPOWER            -1
+#define SDCARDDETECT       -1		
+#define SDSS               20 // 8
+#define LED_PIN             6
+#define PS_ON_PIN          27
+#define KILL_PIN           -1
+#define ALARM_PIN          -1
+
+#ifndef SDSUPPORT
+// these pins are defined in the SD library if building with SD support
+  #define SCK_PIN         21 // 9
+  #define MISO_PIN        23 // 11
+  #define MOSI_PIN        22 // 10
+#endif
+
+#ifdef ULTIPANEL
+#define LCD_PINS_RS         8
+#define LCD_PINS_ENABLE     9
+#define LCD_PINS_D4        10
+#define LCD_PINS_D5        11
+#define LCD_PINS_D6        12
+#define LCD_PINS_D7        13
+#define BTN_EN1            38
+#define BTN_EN2            39
+#define BTN_ENC            40
+#endif
+
+#endif  // MOTHERBOARD == 84 (Teensy++2.0 Breadboard)
+
 
 /****************************************************************************************
 * Gen3+ pin assignment