diff --git a/RaspberryPi/Driver.go b/RaspberryPi/Driver.go
index 4401c30..192b846 100644
--- a/RaspberryPi/Driver.go
+++ b/RaspberryPi/Driver.go
@@ -28,17 +28,17 @@ var in_bit0 gpio.PinIO
 
 func readNibble() byte {
 	// let the Apple II know we are ready to read
-	fmt.Printf("let the Apple II know we are ready to read\n")
+	//fmt.Printf("let the Apple II know we are ready to read\n")
 	out_read.Out(gpio.Low)
 
 	// wait for the Apple II to write
-	fmt.Printf("wait for the Apple II to write\n")
+	//fmt.Printf("wait for the Apple II to write\n")
 	for in_write.Read() == gpio.High {
 		in_write.WaitForEdge(-1)
 	}
 
 	// get a nibble of data
-	fmt.Printf("get a nibble of data\n")
+	//fmt.Printf("get a nibble of data\n")
 	var nibble byte
 	nibble = 0
 	bit3 := in_bit3.Read()
@@ -60,11 +60,11 @@ func readNibble() byte {
 	}
 
 	// let the Apple II know we are done reading
-	fmt.Printf("let the Apple II know we are done reading\n")
+	//fmt.Printf("let the Apple II know we are done reading\n")
 	out_read.Out(gpio.High)
 
 	// wait for the Apple II to finish writing
-	fmt.Printf("wait for the Apple II to finish writing\n")
+	//fmt.Printf("wait for the Apple II to finish writing\n")
 	for in_write.Read() == gpio.Low {
 		in_write.WaitForEdge(-1)
 	}
@@ -81,7 +81,7 @@ func readByte() byte {
 
 func writeNibble(data byte) {
 	// wait for the Apple II to be ready to read
-	fmt.Printf("wait for the Apple II to be ready to read\n")
+	//fmt.Printf("wait for the Apple II to be ready to read\n")
 	for in_read.Read() == gpio.High {
 		in_read.WaitForEdge(-1)
 	}
@@ -111,19 +111,19 @@ func writeNibble(data byte) {
 	out_bit0.Out(bit0)
 
 	// let Apple II know we're writing
-	fmt.Printf("let Apple II know we're writing\n")
+	//fmt.Printf("let Apple II know we're writing\n")
 	out_write.Out(gpio.Low)
 
 
 	// wait for the Apple II to finsih reading
-	fmt.Printf("wait for the Apple II to finsih reading\n")
+	//fmt.Printf("wait for the Apple II to finsih reading\n")
 	for in_read.Read() == gpio.Low {
-		in_write.WaitForEdge(-1)
+		in_read.WaitForEdge(-1)
 	}
 
 	// let the Apple II know we are done writing
-	fmt.Printf("let the Apple II know we are done writing\n")
-	out_read.Out(gpio.High)
+	//fmt.Printf("let the Apple II know we are done writing\n")
+	out_write.Out(gpio.High)
 }
 
 func writeByte(data byte) {
@@ -137,7 +137,16 @@ func readBlock(buffer []byte) {
 	}
 }
 
-func writeBlock() {
+func dumpBlock(buffer []byte) {
+	for i := 0; i < 512; i++ {
+		fmt.Printf("%02X ", buffer[i])
+	}
+}
+
+func writeBlock(buffer []byte) {
+	for i := 0; i < 512; i++ {
+		buffer[i] = readByte()
+	}
 }
 
 func main() {
@@ -161,7 +170,7 @@ func main() {
 	in_bit0 = gpioreg.ByName("GPIO6")
 
 	fmt.Printf("Starting Apple II RPi...\n")
-	fileName := "Total Replay v4.0-beta.1.hdv"
+	fileName := "Total Replay v4.0-rc.1.hdv"
 	file, err := os.OpenFile(fileName, os.O_RDWR, 0755)
 	if err != nil {
 	//log.Fatal(err)
@@ -170,9 +179,12 @@ func main() {
 	//log.Fatal(err)
 	//}
 
-	for in_write.Read() == gpio.Low {
-		in_write.WaitForEdge(-1)
-	}
+	//for in_write.Read() == gpio.Low {
+	//	in_write.WaitForEdge(-1)
+	//}
+	buffer := make([]byte, 512)
+	//file.ReadAt(buffer, int64(0) * 512)
+	//dumpBlock(buffer)
 
 	for {
 		command := readByte();
@@ -186,11 +198,24 @@ func main() {
 
 			fmt.Printf("Read block %d\n", block)
 
-			buffer := make([]byte, 512)
 
 			file.ReadAt(buffer, int64(block) * 512)
+			//dumpBlock(buffer)
 			readBlock(buffer)
 		}
+		if (command == 2) {
+			blockLow := readByte();
+			blockHigh := readByte();
+
+
+			var block int64
+			block = int64(blockHigh) * 256 + int64(blockLow)
+
+			fmt.Printf("Write block %d\n", block)
+
+			writeBlock(buffer)
+			file.WriteAt(buffer, int64(block) * 512)
+		}
 	}
 }