diff --git a/avr/Makefile b/avr/Makefile
index 778861e..c1277a8 100644
--- a/avr/Makefile
+++ b/avr/Makefile
@@ -15,7 +15,7 @@ OBJCOPY		= $(CROSS)objcopy
 OBJCOPY_FLAGS	= -S
 
 AVRDUDE		= avrdude
-AVRDUDE_DEVICE	= /dev/ttyACM0
+AVRDUDE_DEVICE	= /dev/cu.usbmodem1411
 AVRDUDE_FLAGS	= -c arduino -p atmega328p -b 115200 -D -P $(AVRDUDE_DEVICE)
 
 HEADERS_LOCAL	=
diff --git a/avr/send.c b/avr/send.c
index ab1fbdb..08c78ec 100644
--- a/avr/send.c
+++ b/avr/send.c
@@ -23,7 +23,7 @@ static uint8_t device = 0x00,
  * So like, we're abusing pins here.  So badly, it's beyond.  So here's what's
  * going down: We want to retain the same physical I/O connections between
  * both the sending and receiving flavors of the whole Game Boy Printer
- * endeavor, and that means that we must absolutely bit bang MOSI and MISO
+ * endeavor, and that mean/s that we must absolutely bit bang MOSI and MISO
  * opposite from their ordinary roles.  The reason being: There is no notion
  * of MISO or MOSI from the Game Boy's (nor its peripherals') point of view.
  * The SI and SO pins over a link cable are crossed over, so SI on one end
@@ -31,27 +31,37 @@ static uint8_t device = 0x00,
  */
 static void spi_init() {
     /*
-     * Configure MISO as output...Oddly, alongside SCK as an output
+     * Set SC to output
      */
-    DDRB |= ((1 << DDB5) | (1 << DDB4));
+    DDRB |= (1 << DDB5);
 
     /*
-     * Configure MOSI as input...Also oddly
+     * Configure SO as output
      */
-    DDRB &= ~(1 << DDB3);
+    DDRB |= (1 << DDB4);
 
     /*
-     * Set output pins clear by default
+     * Configure SI as input with pullup
      */
-    PORTB &= ~((1 << PORTB5) | (1 << PORTB4));
+    DDRB  &= ~(1 << DDB3);
+    PORTB |=  (1 << DDB3);
+
+    /*
+     * Set SO clear
+     */
+    PORTB &= ~(1 << PORTB4);
+
+    /*
+     * Set SC high
+     */
+    PORTB |= (1 << PORTB5);
 }
 
 static uint8_t spi_send_byte(uint8_t value) {
-    uint8_t ret = 0,
-              i = 0;
+    uint8_t i, ret = 0;
 
     for (i=0; i<8; i++) {
-        PORTB |= (1 << PORTB5);
+        PORTB &= ~(1 << PORTB5);
 
         if (value & 0x80) {
             PORTB |=  (1 << PORTB4);
@@ -59,21 +69,22 @@ static uint8_t spi_send_byte(uint8_t value) {
             PORTB &= ~(1 << PORTB4);
         }
 
-        _delay_us(140);
+        value <<= 1;
+        ret   <<= 1;
 
-        ret <<= 1;
+        _delay_us(60);
+
+        PORTB |= (1 << PORTB5);
 
         if (PINB & (1 << PINB3)) {
             ret |= 1;
         }
 
-        PORTB &= ~(1 << PORTB5);
-
-        _delay_us(140);
-
-        value <<= 1;
+        _delay_us(60);
     }
 
+    _delay_us(270);
+
     return ret;
 }
 
@@ -91,10 +102,10 @@ static void spi_send_packet() {
     (void)spi_send_byte( sum & 0x00ff);
     (void)spi_send_byte((sum & 0xff00) >> 8);
 
-    _delay_us(1200);
-
     device = spi_send_byte(0);
     status = spi_send_byte(0);
+
+    _delay_us(270);
 }
 
 static uint16_t checksum() {
@@ -113,8 +124,7 @@ static uint16_t checksum() {
 }
 
 int main() {
-    uint16_t sum = 0,
-             i = 0,
+    uint16_t i = 0,
              b = 0,
              c;
 
@@ -123,6 +133,16 @@ int main() {
 
     sei();
 
+    while (1) {
+        uart_putchar('O', NULL);
+
+        c = uart_getchar(NULL);
+
+        if (c == 'K') {
+            break;
+        }
+    }
+
     while (1) {
         c = uart_getchar(NULL);