diff --git a/Makefile b/Makefile
index 4f0fb69..82d5ead 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 # Parameter for current board
-BOARD?=galp3-c
+#BOARD?=system76/galp3-c
+BOARD?=arduino/atmega2560
 
 # Set build directory
 BUILD=build/$(BOARD)
diff --git a/doc/README.md b/doc/README.md
new file mode 100644
index 0000000..4e8b774
--- /dev/null
+++ b/doc/README.md
@@ -0,0 +1,5 @@
+# System76 EC documetation
+
+## TODO
+
+- Define what functions are required in each board, ec, and arch
diff --git a/src/arch/8051/arch.mk b/src/arch/8051/arch.mk
index 1f81633..37b9505 100644
--- a/src/arch/8051/arch.mk
+++ b/src/arch/8051/arch.mk
@@ -9,12 +9,12 @@ sim: $(BUILD)/ec.rom
 		--no-default-features \
 		-- $<
 
-# Convert from Intel Hex format to binary
+# Convert from Intel Hex file to binary file
 $(BUILD)/ec.rom: $(BUILD)/ec.ihx
 	@mkdir -p $(@D)
 	makebin -p < $< > $@
 
-# Link object files into Intel Hex format
+# Link object files into Intel Hex file
 $(BUILD)/ec.ihx: $(OBJ)
 	@mkdir -p $(@D)
 	$(CC) -o $@ $^
diff --git a/src/arch/avr/arch.mk b/src/arch/avr/arch.mk
new file mode 100644
index 0000000..b754757
--- /dev/null
+++ b/src/arch/avr/arch.mk
@@ -0,0 +1,26 @@
+CC=avr-gcc -mmcu=$(EC)
+OBJ=$(patsubst src/%.c,$(BUILD)/%.o,$(SRC))
+
+# Run EC rom in simulator
+sim: $(BUILD)/ec.elf
+	simavr $< --mcu $(EC)
+
+# Convert from Intel Hex file to binary file
+$(BUILD)/ec.rom: $(BUILD)/ec.ihx
+	@mkdir -p $(@D)
+	makebin -p < $< > $@
+
+# Convert from ELF file to Intel Hex file
+$(BUILD)/ec.ihx: $(OBJ)
+	@mkdir -p $(@D)
+	avr-objcopy -j .text -j .data -O ihex $< $@
+
+# Link object files into ELF file
+$(BUILD)/ec.elf: $(OBJ)
+	@mkdir -p $(@D)
+	$(CC) -o $@ $^
+
+# Compile C files into object files
+$(BUILD)/%.o: src/%.c $(INCLUDE)
+	@mkdir -p $(@D)
+	$(CC) -o $@ -c $<
diff --git a/src/board/arduino/atmega2560/board.mk b/src/board/arduino/atmega2560/board.mk
new file mode 100644
index 0000000..dcdaa57
--- /dev/null
+++ b/src/board/arduino/atmega2560/board.mk
@@ -0,0 +1 @@
+EC=atmega2560
diff --git a/src/board/arduino/atmega2560/include/cpu.h b/src/board/arduino/atmega2560/include/cpu.h
new file mode 100644
index 0000000..9cca1db
--- /dev/null
+++ b/src/board/arduino/atmega2560/include/cpu.h
@@ -0,0 +1,6 @@
+#ifndef CPU_H
+#define CPU_H
+
+#define F_CPU 16000000ULL
+
+#endif // CPU_H
diff --git a/src/board/arduino/atmega2560/include/stdio.h b/src/board/arduino/atmega2560/include/stdio.h
new file mode 100644
index 0000000..15a7669
--- /dev/null
+++ b/src/board/arduino/atmega2560/include/stdio.h
@@ -0,0 +1,7 @@
+#ifndef STDIO_H
+#define STDIO_H
+
+extern struct Uart * stdio_uart;
+void stdio_init(int num, unsigned long baud);
+
+#endif // STDIO_H
diff --git a/src/board/arduino/atmega2560/include/uart.h b/src/board/arduino/atmega2560/include/uart.h
new file mode 100644
index 0000000..1983531
--- /dev/null
+++ b/src/board/arduino/atmega2560/include/uart.h
@@ -0,0 +1,31 @@
+#ifndef UART_H
+#define UART_H
+
+#include <stdint.h>
+
+struct Uart {
+    volatile uint8_t * a;
+    volatile uint8_t * b;
+    volatile uint8_t * c;
+    volatile uint8_t * data;
+    volatile uint8_t * baud_l;
+    volatile uint8_t * baud_h;
+    uint8_t a_read;
+    uint8_t a_write;
+    uint8_t a_init;
+    uint8_t b_init;
+    uint8_t c_init;
+};
+
+void uart_init(struct Uart * uart, unsigned long baud);
+
+int uart_count();
+struct Uart * uart_new(int num);
+
+unsigned char uart_can_read(struct Uart * uart);
+unsigned char uart_can_write(struct Uart * uart);
+
+unsigned char uart_read(struct Uart * uart);
+void uart_write(struct Uart * uart, unsigned char data);
+
+#endif // UART_H
diff --git a/src/board/arduino/atmega2560/main.c b/src/board/arduino/atmega2560/main.c
new file mode 100644
index 0000000..efe1110
--- /dev/null
+++ b/src/board/arduino/atmega2560/main.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+#include "include/stdio.h"
+
+void init(void) {
+    stdio_init(0, 9600);
+}
+
+void main(void) {
+    init();
+
+    printf("Hello from System76 EC for the Arduino Mega 2560!\n");
+    for (;;) {}
+}
diff --git a/src/board/arduino/atmega2560/stdio.c b/src/board/arduino/atmega2560/stdio.c
new file mode 100644
index 0000000..0a0cbf3
--- /dev/null
+++ b/src/board/arduino/atmega2560/stdio.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+#include "include/stdio.h"
+#include "include/uart.h"
+
+struct Uart * stdio_uart = NULL;
+
+int stdio_get(FILE * stream) {
+    return (int)uart_read(stdio_uart);
+}
+
+int stdio_put(char data, FILE * stream) {
+    if (data == '\n') {
+        uart_write(stdio_uart, '\r');
+    }
+    uart_write(stdio_uart, (unsigned char)data);
+    return 0;
+}
+
+FILE stdio_file = FDEV_SETUP_STREAM(stdio_put, stdio_get, _FDEV_SETUP_RW);
+
+void stdio_init(int num, unsigned long baud) {
+    struct Uart * uart = uart_new(num);
+    if(uart != NULL) {
+        uart_init(uart, baud);
+        stdio_uart = uart;
+        stdin = stdout = stderr = &stdio_file;
+    }
+}
diff --git a/src/board/arduino/atmega2560/uart.c b/src/board/arduino/atmega2560/uart.c
new file mode 100644
index 0000000..8cb4edb
--- /dev/null
+++ b/src/board/arduino/atmega2560/uart.c
@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <avr/io.h>
+
+#include "include/cpu.h"
+#include "include/uart.h"
+
+#define UART(N) \
+    { \
+        &UCSR ## N ## A, \
+        &UCSR ## N ## B, \
+        &UCSR ## N ## C, \
+        &UDR ## N, \
+        &UBRR ## N ## L, \
+        &UBRR ## N ## H, \
+        _BV(RXC ## N), \
+        _BV(UDRE ## N), \
+        0, \
+        _BV(RXEN ## N) | _BV(TXEN ## N), \
+        _BV(UCSZ ## N ## 1) | _BV(UCSZ ## N ## 0) \
+    }
+
+#if defined(__AVR_ATmega32U4__)
+    static struct Uart UARTS[] = {
+        UART(1)
+    };
+#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+    static struct Uart UARTS[] = {
+        UART(0),
+        UART(1),
+        UART(2),
+        UART(3)
+    };
+#else
+    #error "Could not find UART definitions"
+#endif
+
+int uart_count() {
+    return sizeof(UARTS)/sizeof(struct Uart);
+}
+
+struct Uart * uart_new(int num) {
+    if (num < uart_count()) {
+        return &UARTS[num];
+    } else {
+        return NULL;
+    }
+}
+
+void uart_init(struct Uart * uart, unsigned long baud) {
+    unsigned long baud_prescale = (F_CPU / (baud * 16UL)) - 1;
+    *(uart->baud_h) = (uint8_t)(baud_prescale>>8);
+    *(uart->baud_l) = (uint8_t)(baud_prescale);
+    *(uart->a) = uart->a_init;
+    *(uart->b) = uart->b_init;
+    *(uart->c) = uart->c_init;
+}
+
+unsigned char uart_can_read(struct Uart * uart) {
+    return (*(uart->a)) & uart->a_read;
+}
+
+unsigned char uart_read(struct Uart * uart) {
+    while (!uart_can_read(uart)) ;
+    return *(uart->data);
+}
+
+unsigned char uart_can_write(struct Uart * uart) {
+    return (*(uart->a)) & uart->a_write;
+}
+
+void uart_write(struct Uart * uart, unsigned char data) {
+    while (!uart_can_write(uart)) ;
+    *(uart->data) = data;
+}
diff --git a/src/acpi.c b/src/board/system76/galp3-c/acpi.c
similarity index 100%
rename from src/acpi.c
rename to src/board/system76/galp3-c/acpi.c
diff --git a/src/board/galp3-c/board.mk b/src/board/system76/galp3-c/board.mk
similarity index 100%
rename from src/board/galp3-c/board.mk
rename to src/board/system76/galp3-c/board.mk
diff --git a/src/delay.c b/src/board/system76/galp3-c/delay.c
similarity index 100%
rename from src/delay.c
rename to src/board/system76/galp3-c/delay.c
diff --git a/src/gctrl.c b/src/board/system76/galp3-c/gctrl.c
similarity index 100%
rename from src/gctrl.c
rename to src/board/system76/galp3-c/gctrl.c
diff --git a/src/gpio.c b/src/board/system76/galp3-c/gpio.c
similarity index 100%
rename from src/gpio.c
rename to src/board/system76/galp3-c/gpio.c
diff --git a/src/include/acpi.h b/src/board/system76/galp3-c/include/acpi.h
similarity index 100%
rename from src/include/acpi.h
rename to src/board/system76/galp3-c/include/acpi.h
diff --git a/src/include/delay.h b/src/board/system76/galp3-c/include/delay.h
similarity index 100%
rename from src/include/delay.h
rename to src/board/system76/galp3-c/include/delay.h
diff --git a/src/include/gctrl.h b/src/board/system76/galp3-c/include/gctrl.h
similarity index 100%
rename from src/include/gctrl.h
rename to src/board/system76/galp3-c/include/gctrl.h
diff --git a/src/include/gpio.h b/src/board/system76/galp3-c/include/gpio.h
similarity index 100%
rename from src/include/gpio.h
rename to src/board/system76/galp3-c/include/gpio.h
diff --git a/src/include/kbc.h b/src/board/system76/galp3-c/include/kbc.h
similarity index 100%
rename from src/include/kbc.h
rename to src/board/system76/galp3-c/include/kbc.h
diff --git a/src/include/kbscan.h b/src/board/system76/galp3-c/include/kbscan.h
similarity index 100%
rename from src/include/kbscan.h
rename to src/board/system76/galp3-c/include/kbscan.h
diff --git a/src/include/pin.h b/src/board/system76/galp3-c/include/pin.h
similarity index 100%
rename from src/include/pin.h
rename to src/board/system76/galp3-c/include/pin.h
diff --git a/src/include/pmc.h b/src/board/system76/galp3-c/include/pmc.h
similarity index 100%
rename from src/include/pmc.h
rename to src/board/system76/galp3-c/include/pmc.h
diff --git a/src/include/ps2.h b/src/board/system76/galp3-c/include/ps2.h
similarity index 100%
rename from src/include/ps2.h
rename to src/board/system76/galp3-c/include/ps2.h
diff --git a/src/include/reset.h b/src/board/system76/galp3-c/include/reset.h
similarity index 100%
rename from src/include/reset.h
rename to src/board/system76/galp3-c/include/reset.h
diff --git a/src/include/timer.h b/src/board/system76/galp3-c/include/timer.h
similarity index 100%
rename from src/include/timer.h
rename to src/board/system76/galp3-c/include/timer.h
diff --git a/src/kbc.c b/src/board/system76/galp3-c/kbc.c
similarity index 100%
rename from src/kbc.c
rename to src/board/system76/galp3-c/kbc.c
diff --git a/src/kbscan.c b/src/board/system76/galp3-c/kbscan.c
similarity index 100%
rename from src/kbscan.c
rename to src/board/system76/galp3-c/kbscan.c
diff --git a/src/main.c b/src/board/system76/galp3-c/main.c
similarity index 100%
rename from src/main.c
rename to src/board/system76/galp3-c/main.c
diff --git a/src/pin.c b/src/board/system76/galp3-c/pin.c
similarity index 100%
rename from src/pin.c
rename to src/board/system76/galp3-c/pin.c
diff --git a/src/pmc.c b/src/board/system76/galp3-c/pmc.c
similarity index 100%
rename from src/pmc.c
rename to src/board/system76/galp3-c/pmc.c
diff --git a/src/ps2.c b/src/board/system76/galp3-c/ps2.c
similarity index 100%
rename from src/ps2.c
rename to src/board/system76/galp3-c/ps2.c
diff --git a/src/reset.c b/src/board/system76/galp3-c/reset.c
similarity index 100%
rename from src/reset.c
rename to src/board/system76/galp3-c/reset.c
diff --git a/src/signature.c b/src/board/system76/galp3-c/signature.c
similarity index 100%
rename from src/signature.c
rename to src/board/system76/galp3-c/signature.c
diff --git a/src/stdio.c b/src/board/system76/galp3-c/stdio.c
similarity index 100%
rename from src/stdio.c
rename to src/board/system76/galp3-c/stdio.c
diff --git a/src/timer.c b/src/board/system76/galp3-c/timer.c
similarity index 100%
rename from src/timer.c
rename to src/board/system76/galp3-c/timer.c
diff --git a/src/ec/atmega2560/ec.mk b/src/ec/atmega2560/ec.mk
new file mode 100644
index 0000000..40fb5ae
--- /dev/null
+++ b/src/ec/atmega2560/ec.mk
@@ -0,0 +1 @@
+ARCH=avr