diff --git a/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo2.pde b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo2.pde
new file mode 100644
index 0000000..8b00e8f
--- /dev/null
+++ b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo2.pde
@@ -0,0 +1,328 @@
+/*
+ 
+  Code to test wiznet WIZ810MJ module
+
+  See:
+
+     <http://code.rancidbacon.com/LearningAboutArduinoWIZ810MJ>     
+
+  Current features:
+  
+      * Initial W5100 driver port:
+     
+          + new-style network configuration
+          
+          + socket creation/listening/closing
+          
+          + Sending/Receiving okay
+          
+          + example "echo" server (no longer)
+          
+          + example "web server" with LED flash.
+
+      * Terrible hacked-together code
+
+  Author:
+
+     follower@rancidbacon.com
+      
+  License:
+    
+     LGPL
+     
+  Version:
+  
+     20071106-0005+
+     
+*/
+
+#include <WIZ810MJ.h>
+
+
+
+// Define SPI-related pins
+#define PIN_DATA_OUT 11 // MOSI (Master Out / Slave In)
+#define PIN_DATA_IN  12 // MISO (Master In / Slave Out)
+#define PIN_SPI_CLOCK  13 // SCK (Serial Clock) 
+#define PIN_SLAVE_SELECT 10 // SS (Slave Select)
+
+// #define PIN_RESET 9 // WIZnet module /RESET
+
+#define PIN_RESET 8 // WIZnet module /RESET
+
+SOCKET testSocket;
+byte ip[6];
+
+void configureSPI() {
+  /*
+
+     Configure pins and registers required for SPI communication.
+  
+  */
+  
+  //   Configure I/O pins
+  pinMode(PIN_DATA_OUT, OUTPUT);
+  pinMode(PIN_DATA_IN, INPUT);
+  pinMode(PIN_SPI_CLOCK, OUTPUT);
+  pinMode(PIN_SLAVE_SELECT, OUTPUT);
+  
+  digitalWrite(PIN_SLAVE_SELECT, HIGH); // Disable slave
+  
+  /*
+     Configure SPI Control Register (SPCR) (All values initially 0)
+      Bit  Description
+        7  SPI Interrupt Enable    -- disable  (SPIE --> 0)
+        6  SPI Enable              -- enable   (SPE  --> 1)
+        5  Data Order              -- MSB 1st  (DORD --> 0) (Slave specific)
+        4  Master/Slave Select     -- master   (MSTR --> 1)
+        3  Clock Polarity          --          (CPOL --> 0) (Slave specific) ("Mode")
+        2  Clock Phase             --          (CPHA --> 0) (Slave specific)
+        1  SPI Clock Rate Select 1 -- }        (SPR1 --> 0) 
+        0  SPI Clock Rate Select 0 -- } fOSC/4 (SPR0 --> 0) ("Fastest" but see SPI2X in SPSR)
+  */
+  SPCR = (1<<SPE)| (1<<MSTR);
+
+  // Clear previous data and status (TODO: Determine if necessary/better way.)
+  // (Based on Playground SPI example.)
+  byte dummy;
+  dummy = SPSR;
+  dummy = SPDR;
+  delay(10);
+  
+}
+
+
+void initModule() {
+  /*
+  
+     Initialise the WIZ810MJ module and driver.
+     
+   */
+
+  /*
+     Initialise the W5100 chip
+     
+     (Originally I thought it was possible for the chip
+      to function without a hardware reset but it
+      seems not to be the case.)
+   */   
+  pinMode(PIN_RESET, OUTPUT);
+  
+  // We rely on the time between function calls to
+  // be long enough for the chip to recognise the
+  // reset.
+  digitalWrite(PIN_RESET, HIGH);
+  digitalWrite(PIN_RESET, LOW); // reset
+  digitalWrite(PIN_RESET, HIGH);
+  
+  // Chip initialisation by driver
+  // Might be redundant following the above reset,
+  // as this performs a software reset.
+  iinchip_init();
+  
+  // Initialise driver
+  // (This is required to configure some variables used
+  // internally by the driver--even if the default chip
+  // configuration is used.)
+  sysinit(0x55, 0x55);
+  
+}
+
+#define PIN_LED 2
+
+void setup () {
+  Serial.begin(9600);
+  Serial.println("Setup enter...");
+
+  configureSPI();    
+  
+  initModule();
+
+  Serial.println("Test W5100 configuration...");        
+  
+  byte config_gateway[] = {192,168,2,101};
+  byte config_subnet_mask[] = {255,255,255,0};
+  byte config_mac_address[] = {0x02,0xDE,0xAD,0xBE,0xEF,0x00};
+  byte config_ip_address[] = {192,168,2,105};
+   
+  setGAR(config_gateway);
+  setSUBR(config_subnet_mask);
+  setSHAR(config_mac_address); 
+  setSIPR(config_ip_address);
+   
+  Serial.println("End test W5100 configuration...");        
+    
+        
+  Serial.println("Test W5100 driver code...");
+  
+  getGAR(ip);
+  
+  Serial.print("Gateway IP read (first digit): ");
+  Serial.println(ip[0], DEC);
+
+  Serial.println("End test W5100 driver code...");        
+
+  pinMode(PIN_LED, OUTPUT);
+  digitalWrite(PIN_LED, HIGH);
+  
+  Serial.println("Setup exit...");
+  
+}
+
+void sendPrompt(uint8_t *buffer) { // {Socket targetSocket, ) {
+
+  strcpy((char *) buffer, "w00t!> ");
+
+  Serial.print("send result: "); 
+  //Serial.println(send(testSocket, buffer, 6), DEC);
+  Serial.println(send(testSocket, buffer, strlen((char *)buffer)), DEC);
+}
+
+void sendBanner(uint8_t *buffer, int ledState) { // {Socket targetSocket, ) {
+
+  //strcpy((char *) buffer, "Content-Type: text/plain\n\nfoo!\n");
+  strcpy((char *) buffer, "HTTP/1.1 200 OK\nContent-Type: text/html\n\n<html><body bgcolor='#000000'>foo!</body></html>\n");
+  if (ledState) {
+   buffer[63] = 'F'; 
+  } else {
+   buffer[65] = 'F';     
+  }
+
+  Serial.print("send result: "); 
+  Serial.println(send(testSocket, buffer, strlen((char *)buffer)), DEC);
+}
+
+
+void loop() {
+  Serial.println("Test W5100 socket...");
+  
+  Serial.print("Create socket result: "); 
+  Serial.println(socket(testSocket, Sn_MR_TCP, 80, 0), DEC);
+
+  Serial.print("Socket status: ");   
+  Serial.println(IINCHIP_READ(Sn_SR(testSocket)), HEX);
+  
+  if (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+    Serial.println("Socket still closed, waiting...");
+    while (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+      //pass
+    }
+  }
+  
+  Serial.print("Listen on socket result: "); 
+  Serial.println(listen(testSocket), DEC);
+
+  Serial.println("Waiting for connection..."); 
+
+  while (getSn_SR(testSocket) == SOCK_LISTEN) {
+    delay(500);
+  }
+
+  Serial.println(getSn_SR(testSocket),HEX);
+
+  getSn_DIPR(testSocket, ip);
+  
+  Serial.print("Destination IP read (last digit): ");
+  Serial.println(ip[3], DEC);
+
+  
+  // TODO: Avoid buffer overflows in both cases...
+#define MAX_RX_BUFFER_SIZE 5
+#define MAX_TX_BUFFER_SIZE 200
+  uint8_t bytesReceived[MAX_RX_BUFFER_SIZE]; // NOTE: Actual buffer should be larger.
+
+  uint8_t bytesToSend[MAX_TX_BUFFER_SIZE];
+
+  //sendBanner(bytesReceived);
+  
+  //sendPrompt(bytesReceived);
+  
+  int dataLength = 0;
+  
+#define STATE_G 0
+#define STATE_E 1
+#define STATE_T 2
+#define STATE_SPACE 3
+#define STATE_SLASH 4
+
+#define STATE_READ 5
+
+#define STATE_END -2
+
+#define STATE_ERR -1
+  int state = STATE_G;
+  int ledState = 1;
+  unsigned char theByte;
+  
+  while (getSn_SR(testSocket) == SOCK_ESTABLISHED) {
+   while (getSn_RX_RSR(testSocket) > 0) {
+     recv(testSocket, bytesReceived, 1);
+     theByte = bytesReceived[0];
+     //Serial.print(bytesReceived[0], BYTE);
+     Serial.print(theByte, BYTE);
+     if ((state == STATE_G) && (theByte == 'G')) {
+       state = STATE_E;
+     } else if ((state == STATE_E) && (theByte == 'E')) {
+       state = STATE_T;       
+     } else if ((state == STATE_T) && (theByte == 'T')) {
+       state = STATE_SPACE;       
+     } else if ((state == STATE_SPACE) && (theByte == ' ')) {
+       state = STATE_SLASH;       
+     } else if ((state == STATE_SLASH) && (theByte == '/')) {
+       state = STATE_READ;       
+     } else if ((state == STATE_READ) && (theByte == '0')) {
+       digitalWrite(PIN_LED, LOW);
+       ledState = 0;
+       //state = STATE_END;
+       delay(100);    
+     } else if ((state == STATE_READ) && (theByte == '1')) {
+       digitalWrite(PIN_LED, HIGH);
+       ledState = 1;
+       //state = STATE_END;
+       delay(100);    
+     } else if (state == STATE_READ) {
+       // It's not a valid byte.
+       state = STATE_END;       
+     } else {
+       state = STATE_ERR;
+     }
+      
+     if ((state == STATE_ERR) || (state == STATE_END)) {
+       Serial.println("");
+       break;
+     }
+       
+     /*
+    dataLength = getSn_RX_RSR(testSocket);
+    
+    if (dataLength >= MAX_RX_BUFFER_SIZE) { // TODO: blah, blah...
+      dataLength = MAX_RX_BUFFER_SIZE-1;
+    }
+    // Serial.print("dataLength: "); Serial.println(dataLength, HEX);
+    //Serial.print("recv result: "); 
+    //Serial.println(recv(testSocket, bytesReceived, dataLength), DEC); // NOTE: Throws away unread portion? No?
+    recv(testSocket, bytesReceived, dataLength); // TODO: Return length?
+    bytesReceived[dataLength]=0x00;
+    Serial.print((char *)bytesReceived);
+    
+    //Serial.print("send result: "); 
+    //Serial.println(send(testSocket, bytesReceived, dataLength), DEC);
+    
+    //sendPrompt(bytesReceived);
+    */
+    
+   }
+   sendBanner(bytesToSend, ledState);
+   //sendPrompt(bytesReceived);
+   break;
+ }
+
+  close(testSocket);
+  disconnect(testSocket);
+                    
+  Serial.println("End test W5100 socket...");        
+
+  
+  
+}
+
diff --git a/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo3.pde b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo3.pde
new file mode 100644
index 0000000..7c20cf6
--- /dev/null
+++ b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo3.pde
@@ -0,0 +1,346 @@
+/*
+ 
+  Code to test wiznet WIZ810MJ module
+
+  See:
+
+     <http://code.rancidbacon.com/LearningAboutArduinoWIZ810MJ>     
+
+  Current features:
+  
+      * Initial W5100 driver port:
+     
+          + new-style network configuration
+          
+          + socket creation/listening/closing
+          
+          + Sending/Receiving okay
+          
+          + example "echo" server (no longer)
+          
+          + example "web server" with LED flash.
+
+      * Terrible hacked-together code
+
+  Author:
+
+     follower@rancidbacon.com
+      
+  License:
+    
+     LGPL
+     
+  Version:
+  
+     20071106-0005+
+     
+*/
+
+#include <WIZ810MJ.h>
+
+
+
+// Define SPI-related pins
+#define PIN_DATA_OUT 11 // MOSI (Master Out / Slave In)
+#define PIN_DATA_IN  12 // MISO (Master In / Slave Out)
+#define PIN_SPI_CLOCK  13 // SCK (Serial Clock) 
+#define PIN_SLAVE_SELECT 10 // SS (Slave Select)
+
+// #define PIN_RESET 9 // WIZnet module /RESET
+
+#define PIN_RESET 8 // WIZnet module /RESET
+
+SOCKET testSocket;
+byte ip[6];
+
+void configureSPI() {
+  /*
+
+     Configure pins and registers required for SPI communication.
+  
+  */
+  
+  //   Configure I/O pins
+  pinMode(PIN_DATA_OUT, OUTPUT);
+  pinMode(PIN_DATA_IN, INPUT);
+  pinMode(PIN_SPI_CLOCK, OUTPUT);
+  pinMode(PIN_SLAVE_SELECT, OUTPUT);
+  
+  digitalWrite(PIN_SLAVE_SELECT, HIGH); // Disable slave
+  
+  /*
+     Configure SPI Control Register (SPCR) (All values initially 0)
+      Bit  Description
+        7  SPI Interrupt Enable    -- disable  (SPIE --> 0)
+        6  SPI Enable              -- enable   (SPE  --> 1)
+        5  Data Order              -- MSB 1st  (DORD --> 0) (Slave specific)
+        4  Master/Slave Select     -- master   (MSTR --> 1)
+        3  Clock Polarity          --          (CPOL --> 0) (Slave specific) ("Mode")
+        2  Clock Phase             --          (CPHA --> 0) (Slave specific)
+        1  SPI Clock Rate Select 1 -- }        (SPR1 --> 0) 
+        0  SPI Clock Rate Select 0 -- } fOSC/4 (SPR0 --> 0) ("Fastest" but see SPI2X in SPSR)
+  */
+  SPCR = (1<<SPE)| (1<<MSTR);
+
+  // Clear previous data and status (TODO: Determine if necessary/better way.)
+  // (Based on Playground SPI example.)
+  byte dummy;
+  dummy = SPSR;
+  dummy = SPDR;
+  delay(10);
+  
+}
+
+
+void initModule() {
+  /*
+  
+     Initialise the WIZ810MJ module and driver.
+     
+   */
+
+  /*
+     Initialise the W5100 chip
+     
+     (Originally I thought it was possible for the chip
+      to function without a hardware reset but it
+      seems not to be the case.)
+   */   
+  pinMode(PIN_RESET, OUTPUT);
+  
+  // We rely on the time between function calls to
+  // be long enough for the chip to recognise the
+  // reset.
+  digitalWrite(PIN_RESET, HIGH);
+  digitalWrite(PIN_RESET, LOW); // reset
+  digitalWrite(PIN_RESET, HIGH);
+  
+  // Chip initialisation by driver
+  // Might be redundant following the above reset,
+  // as this performs a software reset.
+  iinchip_init();
+  
+  // Initialise driver
+  // (This is required to configure some variables used
+  // internally by the driver--even if the default chip
+  // configuration is used.)
+  sysinit(0x55, 0x55);
+  
+}
+
+#define PIN_LED 2
+
+void setup () {
+  Serial.begin(9600);
+  Serial.println("Setup enter...");
+
+  configureSPI();    
+  
+  initModule();
+
+  Serial.println("Test W5100 configuration...");        
+  
+  byte config_gateway[] = {192,168,2,101};
+  byte config_subnet_mask[] = {255,255,255,0};
+  byte config_mac_address[] = {0x02,0xDE,0xAD,0xBE,0xEF,0x00};
+  byte config_ip_address[] = {192,168,2,105};
+   
+  setGAR(config_gateway);
+  setSUBR(config_subnet_mask);
+  setSHAR(config_mac_address); 
+  setSIPR(config_ip_address);
+   
+  Serial.println("End test W5100 configuration...");        
+    
+        
+  Serial.println("Test W5100 driver code...");
+  
+  getGAR(ip);
+  
+  Serial.print("Gateway IP read (first digit): ");
+  Serial.println(ip[0], DEC);
+
+  Serial.println("End test W5100 driver code...");        
+
+  pinMode(PIN_LED, OUTPUT);
+  digitalWrite(PIN_LED, HIGH);
+  
+  Serial.println("Setup exit...");
+  
+}
+
+
+void sendBanner(uint8_t *buffer, int ledState) { // {Socket targetSocket, ) {
+
+  //strcpy((char *) buffer, "Content-Type: text/plain\n\nfoo!\n");
+  strcpy((char *) buffer, "HTTP/1.1 200 OK\nContent-Type: text/html\n\n<html><body bgcolor='#000000'>foo!</body></html>\n");
+  if (ledState) {
+   buffer[63] = 'F'; 
+  } else {
+   buffer[65] = 'F';     
+  }
+
+  Serial.print("send result: "); 
+  Serial.println(send(testSocket, buffer, strlen((char *)buffer)), DEC);
+}
+
+
+uint8_t readByte() {
+  uint8_t theByte;
+  recv(testSocket, &theByte, 1);
+  return theByte;
+}
+
+
+int readMatch(char *stringToMatch) {
+  /*
+
+    Routine to read and match bytes received.
+    
+    (Essentially strcmp replacement without requiring a large receive buffer.)
+    
+    NOTE: Failed matches drop all bytes read so far. (i.e. you can't check for
+          a bunch of possible matches from the same starting position).
+          TODO: Fix this.
+          
+    Note: This blocks if there isn't enough data in the rx buffer.
+    
+  */
+      
+  while (getSn_RX_RSR(testSocket) < strlen(stringToMatch)) {
+     // block
+     // TODO: Return error or wait or "too short"?
+  }
+
+  // TODO: Do fancy string-matching techniques to avoid reading the whole string
+  //       on non-matches. :-)
+  for (int currCharIdx = 0; currCharIdx < strlen(stringToMatch); currCharIdx++) {
+    if (readByte() != stringToMatch[currCharIdx]) {
+       return 0;
+    }
+  }
+  
+  return 1;
+}
+
+
+void loop() {
+  Serial.println("Test W5100 socket...");
+  
+  Serial.print("Create socket result: "); 
+  Serial.println(socket(testSocket, Sn_MR_TCP, 80, 0), DEC);
+
+  Serial.print("Socket status: ");   
+  Serial.println(IINCHIP_READ(Sn_SR(testSocket)), HEX);
+  
+  if (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+    Serial.println("Socket still closed, waiting...");
+    while (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+      //pass
+    }
+  }
+  
+  Serial.print("Listen on socket result: "); 
+  Serial.println(listen(testSocket), DEC);
+
+  Serial.println("Waiting for connection..."); 
+
+  while (getSn_SR(testSocket) == SOCK_LISTEN) {
+    delay(500);
+  }
+
+  Serial.println(getSn_SR(testSocket),HEX);
+
+  getSn_DIPR(testSocket, ip);
+  
+  Serial.print("Destination IP read (last digit): ");
+  Serial.println(ip[3], DEC);
+
+  
+  // TODO: Avoid buffer overflows...
+#define MAX_TX_BUFFER_SIZE 200
+  uint8_t bytesToSend[MAX_TX_BUFFER_SIZE];
+
+  //sendBanner(bytesReceived);
+  
+  int dataLength = 0;
+  
+#define STATE_GET 0
+#define STATE_READ 5
+
+#define STATE_END -2
+
+#define STATE_ERR -1
+  int state = STATE_GET;
+  int ledState = 1;
+  unsigned char theByte;
+  
+  while (getSn_SR(testSocket) == SOCK_ESTABLISHED) {
+   while (getSn_RX_RSR(testSocket) > 0) {
+
+    if (state == STATE_GET) {
+      if (readMatch("GET /")) {
+        state = STATE_READ;
+      } else {
+        state = STATE_ERR;
+      }
+    }
+        
+    if (state == STATE_READ) {
+     
+      theByte = readByte();
+      
+      if (theByte == '0') {        
+       digitalWrite(PIN_LED, LOW);
+       ledState = 0;
+       delay(100);
+     } else if (theByte == '1') {
+       digitalWrite(PIN_LED, HIGH);
+       ledState = 1;
+       delay(100);    
+     } else {
+       // It's not a valid byte.
+       state = STATE_END;       
+     }
+
+    } else {
+      state = STATE_ERR;
+    }
+      
+     if ((state == STATE_ERR) || (state == STATE_END)) {
+       Serial.println("");
+       break;
+     }
+       
+     /*
+    dataLength = getSn_RX_RSR(testSocket);
+    
+    if (dataLength >= MAX_RX_BUFFER_SIZE) { // TODO: blah, blah...
+      dataLength = MAX_RX_BUFFER_SIZE-1;
+    }
+    // Serial.print("dataLength: "); Serial.println(dataLength, HEX);
+    //Serial.print("recv result: "); 
+    //Serial.println(recv(testSocket, bytesReceived, dataLength), DEC); // NOTE: Throws away unread portion? No?
+    recv(testSocket, bytesReceived, dataLength); // TODO: Return length?
+    bytesReceived[dataLength]=0x00;
+    Serial.print((char *)bytesReceived);
+    
+    //Serial.print("send result: "); 
+    //Serial.println(send(testSocket, bytesReceived, dataLength), DEC);
+    
+    */
+    
+   }
+   sendBanner(bytesToSend, ledState);
+   break;
+ }
+
+  close(testSocket);
+  disconnect(testSocket);
+                    
+  Serial.println("End test W5100 socket...");        
+
+  
+  
+}
+
diff --git a/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo4.pde b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo4.pde
new file mode 100644
index 0000000..2775b54
--- /dev/null
+++ b/branches/follower/wiz810mj/src/demo/WizDemo5/WizDemo4.pde
@@ -0,0 +1,732 @@
+/*
+ 
+  Code to test wiznet WIZ810MJ module
+
+  See:
+
+     <http://code.rancidbacon.com/LearningAboutArduinoWIZ810MJ>     
+
+  Current features:
+  
+      * Initial W5100 driver port:
+     
+          + new-style network configuration
+          
+          + socket creation/listening/closing
+          
+          + Sending/Receiving okay
+          
+          + example "echo" server (new version with classes and multiple connections)
+          
+          + example "web server" with LED flash. (not currently)
+
+      * (slighty less) Terrible hacked-together code
+
+  Author:
+
+     follower@rancidbacon.com
+      
+  License:
+    
+     LGPL
+     
+  Version:
+  
+     20071220-0006+
+     
+*/
+
+#include <WIZ810MJ.h>
+
+
+/* --------- SPI --------- */
+
+// Define SPI-related pins
+#define PIN_DATA_OUT 11 // MOSI (Master Out / Slave In)
+#define PIN_DATA_IN  12 // MISO (Master In / Slave Out)
+#define PIN_SPI_CLOCK  13 // SCK (Serial Clock) 
+#define PIN_SLAVE_SELECT 10 // SS (Slave Select)
+
+class SpiConfiguration {
+  
+  public:
+    static void begin(void);
+};
+
+void SpiConfiguration::begin(void) {
+  /*
+
+     Configure pins and registers required for SPI communication.
+  
+  */
+  
+  //   Configure I/O pins
+  pinMode(PIN_DATA_OUT, OUTPUT);
+  pinMode(PIN_DATA_IN, INPUT);
+  pinMode(PIN_SPI_CLOCK, OUTPUT);
+  pinMode(PIN_SLAVE_SELECT, OUTPUT);
+  
+  digitalWrite(PIN_SLAVE_SELECT, HIGH); // Disable slave
+  
+  /*
+     Configure SPI Control Register (SPCR) (All values initially 0)
+      Bit  Description
+        7  SPI Interrupt Enable    -- disable  (SPIE --> 0)
+        6  SPI Enable              -- enable   (SPE  --> 1)
+        5  Data Order              -- MSB 1st  (DORD --> 0) (Slave specific)
+        4  Master/Slave Select     -- master   (MSTR --> 1)
+        3  Clock Polarity          --          (CPOL --> 0) (Slave specific) ("Mode")
+        2  Clock Phase             --          (CPHA --> 0) (Slave specific)
+        1  SPI Clock Rate Select 1 -- }        (SPR1 --> 0) 
+        0  SPI Clock Rate Select 0 -- } fOSC/4 (SPR0 --> 0) ("Fastest" but see SPI2X in SPSR)
+  */
+  SPCR = (1<<SPE)| (1<<MSTR);
+
+  // Clear previous data and status (TODO: Determine if necessary/better way.)
+  // (Based on Playground SPI example.)
+  byte dummy;
+  dummy = SPSR;
+  dummy = SPDR;
+  delay(10);
+  
+}
+
+SpiConfiguration SPI = SpiConfiguration();
+
+/* ----------------------- */
+
+
+/* ------ WIZ810MJ ------ */
+
+class Wiz810MjDevice {
+  
+  public:
+    Wiz810MjDevice(int resetPin);
+    
+    void setIp(byte b0, byte b1, byte b2, byte b3);
+    void setMask(byte b0, byte b1, byte b2, byte b3);
+    void setGateway(byte b0, byte b1, byte b2, byte b3);
+    void setMac(byte b0, byte b1, byte b2, byte b3, byte b4, byte b5);
+  
+  private:
+    void _init(void);
+    byte * _packBuffer(byte b0, byte b1, byte b2, byte b3);
+    byte * _packBuffer(byte b0, byte b1, byte b2, byte b3, byte b4, byte b5);
+    
+    int _resetPin;
+
+    byte _scratchBuffer[6];   // Can we make this static?
+};
+
+
+Wiz810MjDevice::Wiz810MjDevice(int resetPin) {
+  // TODO: We should really allow the chip-select pin to be set here?
+  //       Or require that it's defined. (Currently in the library file 'types.h'.)
+  _resetPin = resetPin;
+  
+  _init();
+}
+
+
+void Wiz810MjDevice::_init(void) {
+  /*
+  
+     Initialise the WIZ810MJ module and driver.
+     
+   */
+
+  /*
+     Initialise the W5100 chip
+     
+     (Originally I thought it was possible for the chip
+      to function without a hardware reset but it
+      seems not to be the case.)
+   */   
+  pinMode(_resetPin, OUTPUT);
+  
+  // We rely on the time between function calls to
+  // be long enough for the chip to recognise the
+  // reset.
+  digitalWrite(_resetPin, HIGH);
+  digitalWrite(_resetPin, LOW); // reset
+  digitalWrite(_resetPin, HIGH);
+  
+  // Chip initialisation by driver
+  // Might be redundant following the above reset,
+  // as this performs a software reset.
+  iinchip_init();
+  
+  // Initialise driver
+  // (This is required to configure some variables used
+  // internally by the driver--even if the default chip
+  // configuration is used.)
+  sysinit(0x55, 0x55);  
+}
+
+byte * Wiz810MjDevice::_packBuffer(byte b0, byte b1, byte b2, byte b3) {
+  /*
+  
+   */
+  return _packBuffer(b0, b1, b2, b3, 0, 0); // Adds two bytes of padding
+}
+
+byte * Wiz810MjDevice::_packBuffer(byte b0, byte b1, byte b2, byte b3, byte b4, byte b5) {
+  /*
+  
+   */
+  _scratchBuffer[0] = b0;
+  _scratchBuffer[1] = b1;
+  _scratchBuffer[2] = b2;
+  _scratchBuffer[3] = b3;
+  _scratchBuffer[4] = b4;
+  _scratchBuffer[5] = b5;
+
+  return _scratchBuffer;
+}
+
+
+void Wiz810MjDevice::setIp(byte b0, byte b1, byte b2, byte b3) {
+  /*
+  
+   */
+  setSIPR(_packBuffer(b0, b1, b2, b3));  
+}
+
+void Wiz810MjDevice::setMask(byte b0, byte b1, byte b2, byte b3) {
+  /*
+  
+   */
+  setSUBR(_packBuffer(b0, b1, b2, b3));  
+}
+
+void Wiz810MjDevice::setGateway(byte b0, byte b1, byte b2, byte b3) {
+  /*
+  
+   */
+  setGAR(_packBuffer(b0, b1, b2, b3));  
+}
+
+void Wiz810MjDevice::setMac(byte b0, byte b1, byte b2, byte b3, byte b4, byte b5) {
+  /*
+  
+   */
+  setSHAR(_packBuffer(b0, b1, b2, b3, b4, b5));  
+}
+
+/* ----------------------- */
+
+/* ---- NetworkConnection ---- */
+
+// TODO: Make this 'NetworkServerConnection'? Or just 'ServerConnection'?
+// TODO: Pull one-line methods into class definition to allow inlining?
+class NetworkConnection { // Essentially a Socket wrapper
+
+  public:
+    NetworkConnection(uint16_t port); // TODO: Add UDP, TCP choice?
+
+    int listen();
+    int isConnected();
+    int available();
+    int read();
+    void print(uint8_t);
+    void close();
+
+  private:
+    SOCKET _socket;
+    static const int _MAX_SOCKETS = MAX_SOCK_NUM; // TODO: Use this.
+    static int _nextSocket;
+};
+
+int NetworkConnection::_nextSocket = 0;
+
+NetworkConnection::NetworkConnection(uint16_t port) {
+  /*
+
+   */
+  _socket = _nextSocket; // TODO: Do properly (& max)
+  _nextSocket++;
+  socket(_socket, Sn_MR_TCP, port, 0);
+}
+
+int NetworkConnection::listen() { // TODO: Make private or protected?
+  /*
+
+   */  
+  return !!::listen(_socket); // TODO: Use C++ namespaces for the driver functions?
+}
+
+int NetworkConnection::available() {
+  /*
+  
+    Functionality matches 'Serial.available()'.
+
+    Note: If the socket is not connected then this will return 0,
+          but it is intended that 'isConnected()' would be checked first.
+
+    Returns:
+      "The number of bytes available to read ... or 0 if none are available.
+      If any data has come in, [...].available() will be greater than 0."
+
+   */
+   // TODO: Do we want to check for 'isConnected' as well, or not?
+   //       We have to, I guess, for valid behaviour with 'getSn_*'.
+   if (!isConnected()) {
+     return 0;
+   }
+   
+   return getSn_RX_RSR(_socket);
+}
+
+#define NO_READ_DATA_AVAILABLE -1
+
+int NetworkConnection::read() {
+  /*
+  
+     Functionality matches 'Serial.read()'.
+
+     Returns:
+       "an int, the first byte of incoming serial data available
+        (or -1 if no data is available)."
+
+
+     Note: I thought 'recv' blocked until data was available,
+           but it currently seems not to block after all.
+           However, because I'm seeking to match the 'Serial.read'
+           behaviour we don't actually want to block anyway,
+           so we'll ignore it for the moment and handle things
+           ourself for now.
+
+   */
+  uint8_t theByte;
+
+  if (!available()) {
+    return NO_READ_DATA_AVAILABLE;
+  }
+  
+  recv(_socket, &theByte, 1);
+  return theByte;    
+}
+
+int NetworkConnection::isConnected() {
+  /*
+
+   */
+ // TODO: If we want the 'Network*' classes to be generic we
+ //       would need to handle this differently:
+ return (getSn_SR(_socket) == SOCK_ESTABLISHED);
+}  
+
+void NetworkConnection::print(uint8_t b) {
+  /*
+
+   */  
+  if (isConnected()) {
+    send(_socket, &b, 1);
+  } else {
+    // Just drop it if we're not connected.
+  }
+}
+
+void NetworkConnection::close() {
+  /*
+
+   */  
+  // TODO: Determine if we need/want the disconnect  (see pg 26 W5100) 
+  ::close(_socket);
+  disconnect(_socket);
+}
+
+
+/* ----------------------- */
+
+/* --  NetworkInterface -- */
+
+#define HANDLE_BAD_ERROR() while (1) {};
+
+// TODO?: Do we want to have a "default" socket accessible by 'Network.read()' etc?
+class NetworkInterface {
+  
+  public:
+    NetworkInterface(Wiz810MjDevice& networkDevice);
+    
+    NetworkConnection listen(uint16_t port);
+
+    Wiz810MjDevice& device; // TODO: Make this a generic "network device" interface
+};
+
+NetworkInterface::NetworkInterface(Wiz810MjDevice& networkDevice) : device (networkDevice) {
+  /*
+
+    Note: The "weirdness" in this function declaration is a "initalization list",
+          i.e. this bit:
+    
+         ) : device (networkDevice) {
+  
+          it is needed to give the 'device' Reference a value supplied to the method
+          rather than having a new 'Wiz810MjDevice' instance created. 
+   */
+   
+   // This may not be the best place to do all this, but it'll do for now:
+  device.setMac(0x02,0xDE,0xAD,0xBE,0xEF,0x00);
+   
+  device.setIp(169,254,254,169); // A local-link IP -- NOTE: This is out of spec.
+  device.setMask(255,255,0,0);   // Matches local-link IP /16
+  
+  device.setGateway(0,0,0,0);   // We can't even guess this, so just skip it.
+   
+};
+
+NetworkConnection NetworkInterface::listen(uint16_t port) {
+   /*
+  
+  
+      NOTE: For reasons I don't understand, this FAILS TO WORK if port >255.
+            The port that gets opened is ~(port mod 255) but if you limit
+            port to be uint8_t for example you don't get an error until
+            the port number is bigger than 'long'.
+            
+      TODO: Track and fix this for port numbers > 255.
+      
+      
+  
+      Returns a NetworkConnection listening on the specified TCP port.
+  
+    */
+    NetworkConnection connection = NetworkConnection(port);
+    
+    // TODO: How to best handle errors?
+    //       There's two major categories I can think of currently:
+    //         1) A socket wasn't available to listen in the first place
+    //         2) The listen attempt failed for some reason
+    //       Using 'HANDLE_BAD_ERROR()' (currently an infinite loop) is
+    //       not ideal but should prevent the above errors slipping by unnoticed.
+    if (!connection.listen()) {
+      HANDLE_BAD_ERROR(); 
+    }
+    
+    return connection;
+}
+
+// NetworkInterface Network = NetworkInterface(...); // TODO: Make this a global
+
+/* ----------------------- */
+
+
+/* ----- EchoServer ------ */
+
+#define ECHO_CONNECT_WAIT 0
+#define ECHO_CONNECTED 1
+#define ECHO_CLOSE 2
+#define ECHO_HALT 3
+
+class EchoServer {
+  
+  public:
+    EchoServer(int port);
+    void next(); // TODO: Return something useful?
+    
+  private:
+    NetworkConnection _connection; // TODO: Make public?
+    int _state;
+};
+
+EchoServer::EchoServer(int port) : _connection (NetworkConnection(port)) {
+  /*
+  
+   */
+
+  _state = ECHO_CONNECT_WAIT;
+
+  _connection.listen(); // TODO: We should be using Network.listen(...) here and in initialisation list.
+}
+  
+void EchoServer::next() {
+  /*
+  
+   */
+
+  // TODO: Use better state machine implementation?
+   
+  if (_state == ECHO_CONNECT_WAIT) {
+    
+    if (_connection.isConnected()) {
+      _state = ECHO_CONNECTED;
+    } else {
+      // Keep waiting
+    }
+    
+  } else if (_state == ECHO_CONNECTED) {
+    
+    if (_connection.available()) {
+      _connection.print(_connection.read());
+    } else if (!_connection.isConnected()) {
+       // Data finished and client disconnected 
+       _state == ECHO_CLOSE;
+    }
+
+  } else if (_state == ECHO_CLOSE) {
+
+    _connection.close();
+    _state = ECHO_HALT;    
+
+  } else if (_state == ECHO_HALT) {
+      // Do nothing
+  } else {
+    // Unknown state, do nothing.
+  }  
+}
+  
+/* ----------------------- */
+
+// #define PIN_RESET 9 // WIZnet module /RESET
+
+#define PIN_RESET 8 // WIZnet module /RESET
+
+SOCKET testSocket;
+byte ip[6];
+
+
+#define PIN_LED 2
+
+void setup () {
+  Serial.begin(9600);
+  Serial.println("Setup enter...");
+
+  Serial.println("Start W5100 configuration...");
+  
+  SPI.begin();    
+  
+  Wiz810MjDevice WIZ810MJ = Wiz810MjDevice(PIN_RESET);
+
+  NetworkInterface Network = NetworkInterface(WIZ810MJ); 
+  
+  Network.device.setIp(192,168,2,105);
+  Network.device.setMask(255,255,255,0);
+   
+  Serial.println("End W5100 configuration...");
+
+  pinMode(PIN_LED, OUTPUT);
+  digitalWrite(PIN_LED, HIGH);
+  
+  Serial.println("Setup exit...");
+
+/**/
+  Serial.println("Test sockets...");
+
+#if 0
+  NetworkConnection conn = Network.listen(7);
+
+  Serial.println("Waiting for connection...");
+
+  while (!conn.isConnected()) {
+    //Serial.print(!conn.isConnected());
+    delay(500); 
+  }
+  
+  Serial.println("Connected...");
+
+  while (conn.isConnected()) {
+     if (conn.available()) {
+       // Serial.print(conn.read(), BYTE);
+       conn.print(conn.read());
+     } 
+  }
+  
+  Serial.println("");
+
+  conn.close();
+#endif
+
+  // This uses the 1-argument constructor of EchoServer and supplies it with 7 for each instance.
+  EchoServer servers[MAX_SOCK_NUM] = {7, 7, 7, 7}; // This will break if MAX_SOCK_NUM changes.
+  
+  while (1) {
+    for (int i=0; i<MAX_SOCK_NUM; i++) {
+      servers[i].next();
+    }
+  }
+
+
+  Serial.println("End test and dummy loop");
+  while (1) {}  
+/**/
+}
+
+#if 0
+void sendBanner(uint8_t *buffer, int ledState) { // {Socket targetSocket, ) {
+
+  //strcpy((char *) buffer, "Content-Type: text/plain\n\nfoo!\n");
+  strcpy((char *) buffer, "HTTP/1.1 200 OK\nContent-Type: text/html\n\n<html><body bgcolor='#000000'>foo!</body></html>\n");
+  if (ledState) {
+   buffer[63] = 'F'; 
+  } else {
+   buffer[65] = 'F';     
+  }
+
+  Serial.print("send result: "); 
+  Serial.println(send(testSocket, buffer, strlen((char *)buffer)), DEC);
+}
+
+
+uint8_t readByte() {
+  uint8_t theByte;
+  recv(testSocket, &theByte, 1);
+  return theByte;
+}
+
+
+int readMatch(char *stringToMatch) {
+  /*
+
+    Routine to read and match bytes received.
+    
+    (Essentially strcmp replacement without requiring a large receive buffer.)
+    
+    NOTE: Failed matches drop all bytes read so far. (i.e. you can't check for
+          a bunch of possible matches from the same starting position).
+          TODO: Fix this.
+          
+    Note: This blocks if there isn't enough data in the rx buffer.
+    
+  */
+      
+  while (getSn_RX_RSR(testSocket) < strlen(stringToMatch)) {
+     // block
+     // TODO: Return error or wait or "too short"?
+  }
+
+  // TODO: Do fancy string-matching techniques to avoid reading the whole string
+  //       on non-matches. :-)
+  for (int currCharIdx = 0; currCharIdx < strlen(stringToMatch); currCharIdx++) {
+    if (readByte() != stringToMatch[currCharIdx]) {
+       return 0;
+    }
+  }
+  
+  return 1;
+}
+
+
+void loop() {
+  Serial.println("Test W5100 socket...");
+  
+  Serial.print("Create socket result: "); 
+  Serial.println(socket(testSocket, Sn_MR_TCP, 80, 0), DEC);
+
+  Serial.print("Socket status: ");   
+  Serial.println(IINCHIP_READ(Sn_SR(testSocket)), HEX);
+  
+  if (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+    Serial.println("Socket still closed, waiting...");
+    while (IINCHIP_READ(Sn_SR(testSocket)) == SOCK_CLOSED) {
+      //pass
+    }
+  }
+  
+  Serial.print("Listen on socket result: "); 
+  Serial.println(listen(testSocket), DEC);
+
+  Serial.println("Waiting for connection..."); 
+
+  while (getSn_SR(testSocket) == SOCK_LISTEN) {
+    delay(500);
+  }
+
+  Serial.println(getSn_SR(testSocket),HEX);
+
+  getSn_DIPR(testSocket, ip);
+  
+  Serial.print("Destination IP read (last digit): ");
+  Serial.println(ip[3], DEC);
+
+  
+  // TODO: Avoid buffer overflows...
+#define MAX_TX_BUFFER_SIZE 200
+  uint8_t bytesToSend[MAX_TX_BUFFER_SIZE];
+
+  //sendBanner(bytesReceived);
+  
+  int dataLength = 0;
+  
+#define STATE_GET 0
+#define STATE_READ 5
+
+#define STATE_END -2
+
+#define STATE_ERR -1
+  int state = STATE_GET;
+  int ledState = 1;
+  unsigned char theByte;
+  
+  while (getSn_SR(testSocket) == SOCK_ESTABLISHED) {
+   while (getSn_RX_RSR(testSocket) > 0) {
+
+    if (state == STATE_GET) {
+      if (readMatch("GET /")) {
+        state = STATE_READ;
+      } else {
+        state = STATE_ERR;
+      }
+    }
+        
+    if (state == STATE_READ) {
+     
+      theByte = readByte();
+      
+      if (theByte == '0') {        
+       digitalWrite(PIN_LED, LOW);
+       ledState = 0;
+       delay(100);
+     } else if (theByte == '1') {
+       digitalWrite(PIN_LED, HIGH);
+       ledState = 1;
+       delay(100);    
+     } else {
+       // It's not a valid byte.
+       state = STATE_END;       
+     }
+
+    } else {
+      state = STATE_ERR;
+    }
+      
+     if ((state == STATE_ERR) || (state == STATE_END)) {
+       Serial.println("");
+       break;
+     }
+       
+     /*
+    dataLength = getSn_RX_RSR(testSocket);
+    
+    if (dataLength >= MAX_RX_BUFFER_SIZE) { // TODO: blah, blah...
+      dataLength = MAX_RX_BUFFER_SIZE-1;
+    }
+    // Serial.print("dataLength: "); Serial.println(dataLength, HEX);
+    //Serial.print("recv result: "); 
+    //Serial.println(recv(testSocket, bytesReceived, dataLength), DEC); // NOTE: Throws away unread portion? No?
+    recv(testSocket, bytesReceived, dataLength); // TODO: Return length?
+    bytesReceived[dataLength]=0x00;
+    Serial.print((char *)bytesReceived);
+    
+    //Serial.print("send result: "); 
+    //Serial.println(send(testSocket, bytesReceived, dataLength), DEC);
+    
+    */
+    
+   }
+   sendBanner(bytesToSend, ledState);
+   break;
+ }
+
+  close(testSocket);
+  disconnect(testSocket);
+                    
+  Serial.println("End test W5100 socket...");        
+
+  
+  
+}
+#else
+void loop() {
+}
+#endif