diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 4aff7fe099..9db8dee5f4 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -37,6 +37,8 @@
 // 7  = Ultimaker
 // 71 = Ultimaker (Older electronics. Pre 1.5.4. This is rare)
 // 8  = Teensylu
+// 81 = Printrboard (AT90USB1286)
+// 82 = Brainwave (AT90USB646)
 // 9  = Gen3+
 // 70 = Megatronics
 // 90 = Alpha OMCA board
diff --git a/Marlin/Makefile b/Marlin/Makefile
index 28f4120d01..dee6eccbe0 100644
--- a/Marlin/Makefile
+++ b/Marlin/Makefile
@@ -99,21 +99,21 @@ MCU              ?= atmega328p
 #Gen6
 else ifeq  ($(HARDWARE_MOTHERBOARD),5)
 HARDWARE_VARIANT ?= Gen6
-MCU              ?= atmega664p
+MCU              ?= atmega644p
 else ifeq  ($(HARDWARE_MOTHERBOARD),51)
 HARDWARE_VARIANT ?= Gen6
-MCU              ?= atmega664p
+MCU              ?= atmega644p
 
 #Sanguinololu
 else ifeq  ($(HARDWARE_MOTHERBOARD),6)
 HARDWARE_VARIANT ?= Sanguino
-MCU              ?= atmega1284p
+MCU              ?= atmega644p
 else ifeq  ($(HARDWARE_MOTHERBOARD),62)
 HARDWARE_VARIANT ?= Sanguino
-MCU              ?= atmega1284p
+MCU              ?= atmega644p
 else ifeq  ($(HARDWARE_MOTHERBOARD),63)
 HARDWARE_VARIANT ?= Sanguino
-MCU              ?= atmega1284p
+MCU              ?= atmega644p
 
 #Ultimaker
 else ifeq  ($(HARDWARE_MOTHERBOARD),7)
@@ -127,6 +127,12 @@ MCU              ?= atmega1280
 else ifeq  ($(HARDWARE_MOTHERBOARD),8)
 HARDWARE_VARIANT ?= Teensyduino
 MCU              ?= at90usb1286
+else ifeq  ($(HARDWARE_MOTHERBOARD),81)
+HARDWARE_VARIANT ?= Teensyduino
+MCU              ?= at90usb1286
+else ifeq  ($(HARDWARE_MOTHERBOARD),82)
+HARDWARE_VARIANT ?= Teensyduino
+MCU              ?= at90usb646
 
 #Gen3+
 else ifeq  ($(HARDWARE_MOTHERBOARD),9)
diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h
index 2af7dc97a9..a6aa43e00a 100644
--- a/Marlin/Marlin.h
+++ b/Marlin/Marlin.h
@@ -4,8 +4,6 @@
 #ifndef MARLIN_H
 #define MARLIN_H
 
-#define  HardwareSerial_h // trick to disable the standard HWserial
-
 #define  FORCE_INLINE __attribute__((always_inline)) inline
 
 #include <math.h>
@@ -24,6 +22,10 @@
 #include "Configuration.h"
 #include "pins.h"
 
+#ifndef AT90USB
+#define  HardwareSerial_h // trick to disable the standard HWserial
+#endif
+
 #if ARDUINO >= 100 
   #if defined(__AVR_ATmega644P__)
     #include "WProgram.h"
@@ -45,7 +47,7 @@
 
 #include "WString.h"
 
-#if MOTHERBOARD == 8  // Teensylu
+#ifdef AT90USB
   #define MYSERIAL Serial
 #else
   #define MYSERIAL MSerial
@@ -179,7 +181,7 @@ void setPwmFrequency(uint8_t pin, int val);
 
 extern float homing_feedrate[];
 extern bool axis_relative_modes[];
-extern int feedmultiply;
+extern int feedmultiply;
 extern bool feedmultiplychanged;
 extern int extrudemultiply; // Sets extrude multiply factor (in percent)
 extern float current_position[NUM_AXIS] ;
diff --git a/Marlin/MarlinSerial.cpp b/Marlin/MarlinSerial.cpp
index 0d2aceb3f2..1358f38590 100644
--- a/Marlin/MarlinSerial.cpp
+++ b/Marlin/MarlinSerial.cpp
@@ -23,7 +23,7 @@
 #include "Marlin.h"
 #include "MarlinSerial.h"
 
-#if MOTHERBOARD != 8 // !teensylu
+#ifndef AT90USB
 // this next line disables the entire HardwareSerial.cpp, 
 // this is so I can support Attiny series and any other chip without a uart
 #if defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H)
@@ -319,5 +319,4 @@ void MarlinSerial::printFloat(double number, uint8_t digits)
 MarlinSerial MSerial;
 
 #endif // whole file
-#endif //teensylu
-
+#endif // !AT90USB
diff --git a/Marlin/MarlinSerial.h b/Marlin/MarlinSerial.h
index a48ffbe509..9514730fa0 100644
--- a/Marlin/MarlinSerial.h
+++ b/Marlin/MarlinSerial.h
@@ -65,7 +65,7 @@
 #define BYTE 0
 
 
-#if MOTHERBOARD != 8 // ! teensylu
+#ifndef AT90USB
 // Define constants and variables for buffering incoming serial data.  We're
 // using a ring buffer (I think), in which rx_buffer_head is the index of the
 // location to which to write the next incoming character and rx_buffer_tail
@@ -179,6 +179,6 @@ class MarlinSerial //: public Stream
 };
 
 extern MarlinSerial MSerial;
-#endif // ! teensylu
+#endif // !AT90USB
 
 #endif
diff --git a/Marlin/fastio.h b/Marlin/fastio.h
index 6749a28bf9..ed77b50e23 100644
--- a/Marlin/fastio.h
+++ b/Marlin/fastio.h
@@ -1928,7 +1928,7 @@ pins
 
 #endif
 
-#if defined (__AVR_AT90USB1287__) || defined (__AVR_AT90USB1286__)
+#if defined (__AVR_AT90USB1287__) || defined (__AVR_AT90USB1286__) || defined (__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
 // SPI
 #define	SCK					DIO9
 #define	MISO				DIO11
diff --git a/Marlin/pins.h b/Marlin/pins.h
index febe2cd1f3..59f86a5ac7 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -957,64 +957,140 @@
 #endif
 
 /****************************************************************************************
-* Teensylu 0.7 pin assingments (ATMEGA90USB)
-* Requires the Teensyduino software with Teensy2.0++ selected in arduino IDE!
+* Teensylu 0.7 / Printrboard 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
 ****************************************************************************************/
-#if MOTHERBOARD == 8
-#define MOTHERBOARD 8
+#if MOTHERBOARD == 8 || MOTHERBOARD == 81
 #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 X_STEP_PIN          0  
-#define X_DIR_PIN           1  
-#define X_ENABLE_PIN       39 
-#define X_MIN_PIN          13 
-#define X_MAX_PIN          -1    
+#define X_STEP_PIN          0
+#define X_DIR_PIN           1
+#define X_ENABLE_PIN       39
+#define X_MIN_PIN          13
+#define X_MAX_PIN          -1
 
-#define Y_STEP_PIN          2  
-#define Y_DIR_PIN           3 
-#define Y_ENABLE_PIN       38 
-#define Y_MIN_PIN          14 
-#define Y_MAX_PIN          -1    
+#define Y_STEP_PIN          2
+#define Y_DIR_PIN           3
+#define Y_ENABLE_PIN       38
+#define Y_MIN_PIN          14
+#define Y_MAX_PIN          -1
 
 #define Z_STEP_PIN          4
-#define Z_DIR_PIN           5 
-#define Z_ENABLE_PIN       23 
-#define Z_MIN_PIN          15 
-#define Z_MAX_PIN          -1    
-
-#define E0_STEP_PIN         6  
-#define E0_DIR_PIN          7 
-#define E0_ENABLE_PIN       19 
-
+#define Z_DIR_PIN           5
+#define Z_ENABLE_PIN       23
+#define Z_MIN_PIN          15
+#define Z_MAX_PIN          -1
 
+#define E0_STEP_PIN         6
+#define E0_DIR_PIN          7
+#define E0_ENABLE_PIN      19
 
 #define HEATER_0_PIN       21  // Extruder
 #define HEATER_1_PIN       -1
 #define HEATER_2_PIN       -1
 #define HEATER_BED_PIN     20  // Bed
-#define FAN_PIN            22  // Fan   
+#define FAN_PIN            22  // Fan
+
+#if MOTHERBOARD == 8
+  #define TEMP_0_PIN          7  // Extruder / Analog pin numbering
+  #define TEMP_BED_PIN        6  // Bed / Analog pin numbering
+#else
+  #define TEMP_0_PIN          1  // Extruder / Analog pin numbering
+  #define TEMP_BED_PIN        0  // Bed / Analog pin numbering
+#endif
 
-#define TEMP_0_PIN          7  // Extruder
 #define TEMP_1_PIN         -1
 #define TEMP_2_PIN         -1
-#define TEMP_BED_PIN        6  // Bed
 
 #define SDPOWER            -1
 #define SDSS                8
 #define LED_PIN            -1
 #define PS_ON_PIN          -1
-#define KILL_PIN           -1 
+#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           9 
-  #define MISO_PIN         11 
-  #define MOSI_PIN         10 
+// these pins are defined in the SD library if building with SD support
+  #define SCK_PIN           9
+  #define MISO_PIN         11
+  #define MOSI_PIN         10
 #endif
+
+#endif  // MOTHERBOARD == 8 (Teensylu) or 81 (Printrboard)
+
+/****************************************************************************************
+ * Brainwave 1.0 pin assignments (AT90USB646)
+ * Requires hardware bundle for Arduino:
+   https://github.com/unrepentantgeek/brainwave-arduino
+ ****************************************************************************************/
+#if MOTHERBOARD == 82
+#define KNOWN_BOARD 1
+#define AT90USB 646  // Disable MarlinSerial etc.
+
+#ifndef __AVR_AT90USB646__
+#error Oops!  Make sure you have 'Brainwave' selected from the 'Tools -> Boards' menu.
 #endif
 
+#define X_STEP_PIN         27
+#define X_DIR_PIN          29
+#define X_ENABLE_PIN       28
+#define X_MIN_PIN           7
+#define X_MAX_PIN          -1
+#define X_ATT_PIN          26
+
+#define Y_STEP_PIN         31
+#define Y_DIR_PIN          33
+#define Y_ENABLE_PIN       32
+#define Y_MIN_PIN           6
+#define Y_MAX_PIN          -1
+#define Y_ATT_PIN          30
+
+#define Z_STEP_PIN         17
+#define Z_DIR_PIN          19
+#define Z_ENABLE_PIN       18
+#define Z_MIN_PIN           5
+#define Z_MAX_PIN          -1
+#define Z_ATT_PIN          16
+
+#define E0_STEP_PIN        21
+#define E0_DIR_PIN         23
+#define E0_ENABLE_PIN      22
+#define E0_ATT_PIN         20
+
+#define HEATER_0_PIN        4  // Extruder
+#define HEATER_1_PIN       -1
+#define HEATER_2_PIN       -1
+#define HEATER_BED_PIN     38  // Bed
+#define FAN_PIN             3  // Fan
+
+#define TEMP_0_PIN          7  // Extruder / Analog pin numbering
+#define TEMP_1_PIN         -1
+#define TEMP_2_PIN         -1
+#define TEMP_BED_PIN        6  // Bed / Analog pin numbering
+
+#define SDPOWER            -1
+#define SDSS               -1
+#define LED_PIN            39
+#define PS_ON_PIN          -1
+#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           9
+  #define MISO_PIN         11
+  #define MOSI_PIN         10
+#endif
+
+#endif  // MOTHERBOARD == 82 (Brainwave)
+
 /****************************************************************************************
 * Gen3+ pin assignment
 *
diff --git a/Marlin/stepper.cpp b/Marlin/stepper.cpp
index 760b3a752a..81b2ab75c6 100644
--- a/Marlin/stepper.cpp
+++ b/Marlin/stepper.cpp
@@ -478,10 +478,10 @@ ISR(TIMER1_COMPA_vect)
 
     
     for(int8_t i=0; i < step_loops; i++) { // Take multiple steps per interrupt (For high speed moves) 
-      #if MOTHERBOARD != 8 // !teensylu
+      #ifndef AT90USB
       MSerial.checkRx(); // Check for serial chars.
-      #endif 
-      
+      #endif
+
       #ifdef ADVANCE
       counter_e += current_block->steps_e;
       if (counter_e > 0) {