diff --git a/include/pinproc.h b/include/pinproc.h
index f2ddabe..fbbf097 100644
--- a/include/pinproc.h
+++ b/include/pinproc.h
@@ -39,7 +39,9 @@
     #if defined(PR_BUILDING_PR)
         #define PR_EXPORT __declspec(dllexport) extern
     #else
-        #define PR_EXPORT __declspec(dllimport) extern
+        // TODO: Decide what to do here:
+        //#define PR_EXPORT __declspec(dllimport) extern
+        #define PR_EXPORT
     #endif
 #endif
 
@@ -115,9 +117,15 @@ PR_EXPORT PRResult PRReset(PRHandle handle, uint32_t resetFlags);
 
 // I/O
 
-/** Flush all pending write data out to the P-ROC */
+/** Flush all pending write data out to the P-ROC. */
 PR_EXPORT PRResult PRFlushWriteData(PRHandle handle);
 
+/** Write data out to the P-ROC immediately (does not require a call to PRFlushWriteData). */
+PR_EXPORT PRResult PRWriteData(PRHandle handle, uint32_t moduleSelect, uint32_t startingAddr, int32_t numWriteWords, uint32_t * writeBuffer);
+
+/** Read data from the P-ROC. */
+PR_EXPORT PRResult PRReadData(PRHandle handle, uint32_t moduleSelect, uint32_t startingAddr, int32_t numReadWords, uint32_t * readBuffer);
+
 // Drivers
 /** @defgroup drivers Driver Manipulation
  * @{
diff --git a/src/PRDevice.cpp b/src/PRDevice.cpp
index b67c4e2..84fbe0b 100644
--- a/src/PRDevice.cpp
+++ b/src/PRDevice.cpp
@@ -525,7 +525,7 @@ PRResult PRDevice::SwitchGetStates( PREventType * switchStates, uint16_t numSwit
     // Wait for data to return.  Give it 10 loops before giving up.
     while (requestedDataQueue.size() < numWords && i++ < 10) 
     {
-        sleep (.01); // 10 milliseconds should be plenty of time.
+        PRSleep (10); // 10 milliseconds should be plenty of time.
         SortReturningData();
     }
 
@@ -677,7 +677,7 @@ PRResult PRDevice::VerifyChipID()
     max_count = 0;
     //std::cout << "Waiting for read data ";
     while (num_collected_bytes < (bufferWords*4) && max_count < 10) {
-        sleep(.01);
+        PRSleep(10);
         //std::cout << ". ";
         rc = CollectReadData();
         max_count++;
@@ -784,6 +784,51 @@ PRResult PRDevice::WriteData(uint32_t * words, int32_t numWords)
     }
 }
 
+PRResult PRDevice::WriteDataRaw(uint32_t moduleSelect, uint32_t startingAddr, int32_t numWriteWords, uint32_t * writeBuffer)
+{
+    uint32_t * buffer;
+
+    buffer = (uint32_t *)malloc((numWriteWords * 4) + 1);
+    buffer[0] = CreateBurstCommand(moduleSelect, startingAddr, numWriteWords);
+    memcpy(buffer+1, writeBuffer, numWriteWords * 4);
+    WriteData(buffer, numWriteWords + 1);
+    free (buffer);
+}
+
+PRResult PRDevice::ReadDataRaw(uint32_t moduleSelect, uint32_t startingAddr, int32_t numReadWords, uint32_t * readBuffer)
+{
+    uint32_t rc;
+    uint8_t i;
+
+    // Send out the request.
+    rc = RequestData(moduleSelect, startingAddr, numReadWords);
+
+    i = 0; // Reset i so it can be used to prevent an infinite loop below
+
+    // Wait for data to return.  Give it 10 loops before giving up.
+    // Expect numReadWords + 1 word with the address.
+    while (requestedDataQueue.size() < (numReadWords + 1) && i++ < 10) 
+    {
+        PRSleep (10); // 10 milliseconds should be plenty of time.
+        SortReturningData();
+    }
+
+    // Make sure all of the requested words are available before processing them.
+    // Too many words is just as bad as not enough words.  
+    // If too many come back, can they be trusted?
+    if (requestedDataQueue.size() == numReadWords + 1)
+    {
+        requestedDataQueue.pop(); // Ignore address word.  TODO: Verify the address.
+        for (i = 0; i < numReadWords; i++)
+        {
+            readBuffer[i] =  requestedDataQueue.front(); 
+            requestedDataQueue.pop(); 
+        }
+        return kPRSuccess;
+    }
+    else return kPRFailure;
+}
+
 
 int32_t PRDevice::ReadData(uint32_t *buffer, int32_t num_words)
 {
@@ -834,7 +879,7 @@ int32_t PRDevice::CollectReadData()
 {
     int32_t rc,i;
     rc = PRHardwareRead(collect_buffer, FTDI_BUFFER_SIZE-num_collected_bytes);
-    for (i=0; i<rc; i=i++) {
+    for (i=0; i<rc; i++) {
         collected_bytes_fifo[collected_bytes_wr_addr] = collect_buffer[i];
         if (collected_bytes_wr_addr == (FTDI_BUFFER_SIZE-1))
             collected_bytes_wr_addr = 0;
diff --git a/src/PRDevice.h b/src/PRDevice.h
index 3c0737a..2e32363 100644
--- a/src/PRDevice.h
+++ b/src/PRDevice.h
@@ -54,6 +54,8 @@ public:
     int GetEvents(PREvent *events, int maxEvents);
 
     PRResult FlushWriteData();
+    PRResult WriteDataRaw(uint32_t moduleSelect, uint32_t startingAddr, int32_t numWriteWords, uint32_t * buffer);
+    PRResult ReadDataRaw(uint32_t moduleSelect, uint32_t startingAddr, int32_t numReadWords, uint32_t * readBuffer);
 
     PRResult DriverUpdateGlobalConfig(PRDriverGlobalConfig *driverGlobalConfig);
     PRResult DriverGetGroupConfig(uint8_t groupNum, PRDriverGroupConfig *driverGroupConfig);
@@ -86,9 +88,7 @@ protected:
     /** Schedules data to be written to the P-ROC.  */
     PRResult PrepareWriteData(uint32_t * buffer, int32_t numWords);
 
-    /** Writes data to P-ROC.
-     * Returns #kPFailure if the number of words read does not match the number requested.
-     */
+    /** Writes data to the P-ROC immediately. */
     PRResult WriteData(uint32_t * buffer, int32_t numWords);
 
     /**
diff --git a/src/PRHardware.cpp b/src/PRHardware.cpp
index 3460012..c698e7c 100644
--- a/src/PRHardware.cpp
+++ b/src/PRHardware.cpp
@@ -240,8 +240,12 @@ int32_t CreateDMDUpdateConfigBurst ( uint32_t * burst, PRDMDConfig *dmd_config)
  * As we add support for other drivers (such as D2xx on Windows), we will add more implementations of the PRHardware*() functions here.
  */
 
-#if !defined(USE_LIBFTDI)
-#define USE_LIBFTDI 1
+#if defined(__WIN32__)
+    #define USE_D2XX 1
+#endif
+
+#if !defined(USE_D2XX)
+    #define USE_LIBFTDI 1
 #endif
 
 #if USE_LIBFTDI
@@ -346,3 +350,134 @@ int PRHardwareWrite(uint8_t *buffer, int bytes)
 }
 
 #endif // USE_LIBFTDI
+
+#if USE_D2XX
+#include "ftd2xx.h"
+
+#define BUF_SIZE 16
+#define MAX_DEVICES 1
+
+// Globals
+static FT_HANDLE ftHandles[MAX_DEVICES];
+static FT_HANDLE ftHandle;
+
+PRResult PRHardwareOpen()
+{
+    char 	cBufWrite[BUF_SIZE];
+    char * 	pcBufLD[MAX_DEVICES + 1];
+    char 	cBufLD[MAX_DEVICES][64];
+    FT_STATUS	ftStatus;
+    int	iNumDevs = 0;
+    int	i, j;
+    int	iDevicesOpen = 0;
+
+    for(i = 0; i < MAX_DEVICES; i++) {
+        pcBufLD[i] = cBufLD[i];
+        ftHandles[i] = NULL;
+    }
+    pcBufLD[MAX_DEVICES] = NULL;
+    
+    ftStatus = FT_ListDevices(pcBufLD, &iNumDevs, FT_LIST_ALL | FT_OPEN_BY_SERIAL_NUMBER);
+    
+    if(ftStatus != FT_OK) {
+        DEBUG(PRLog(kPRLogInfo,"Error: FT_ListDevices(%d)\n", ftStatus));
+        return kPRFailure;
+    }
+    
+    for(j = 0; j < BUF_SIZE; j++) {
+        cBufWrite[j] = j;
+    }
+    
+    for(i = 0; ( (i <MAX_DEVICES) && (i < iNumDevs) ); i++) {
+        DEBUG(PRLog(kPRLogInfo,"Device %d Serial Number - %s\n", i, cBufLD[i]));
+    }
+
+    for(i = 0; ( (i <MAX_DEVICES) && (i < iNumDevs) ) ; i++) {
+        /* Setup */
+        if((ftStatus = FT_OpenEx(cBufLD[i], FT_OPEN_BY_SERIAL_NUMBER, &ftHandles[i])) != FT_OK){
+            /* 
+                This can fail if the ftdi_sio driver is loaded
+                use lsmod to check this and rmmod ftdi_sio to remove
+                also rmmod usbserial
+            */
+            DEBUG(PRLog(kPRLogInfo,"Error FT_OpenEx(%d), device\n", ftStatus, i));
+            return kPRFailure;
+        }
+    
+        DEBUG(PRLog(kPRLogInfo,"Opened device %s\n", cBufLD[i]));
+        ftHandle = ftHandles[i];
+
+        if((ftStatus = FT_SetBaudRate(ftHandles[i], 1228800)) != FT_OK) {
+            DEBUG(PRLog(kPRLogInfo,"Error FT_SetBaudRate(%d), cBufLD[i] = %s\n", ftStatus, cBufLD[i]));
+        }
+    
+        iDevicesOpen++;
+    }
+
+    if (iDevicesOpen > 0) 
+    {
+      FT_ResetDevice(ftHandle);
+      DEBUG(PRLog(kPRLogInfo,"FTDI Device Opened\n"));
+      return kPRSuccess;
+    }
+    else return kPRFailure;
+}
+    
+void PRHardwareClose()
+{
+    int i;
+
+    for(i = 0; i < MAX_DEVICES; i++) {
+        if(ftHandles[i] != NULL) {
+            FT_Close(ftHandles[i]);
+            ftHandles[i] = NULL;
+            DEBUG(PRLog(kPRLogInfo,"Closed device\n"));
+        }
+    }
+}
+
+int PRHardwareRead(uint8_t *buffer, int maxBytes)
+{
+    FT_STATUS ftStatus; 
+    DWORD bytesToRead;
+    DWORD bytesRead;
+    int i;
+
+    ftStatus = FT_GetQueueStatus(ftHandle,&bytesToRead);
+    if (ftStatus != FT_OK) return 0;
+   
+    if (maxBytes < bytesToRead) bytesToRead = maxBytes;
+    ftStatus = FT_Read(ftHandle, buffer, bytesToRead, &bytesRead);
+    if (ftStatus == FT_OK) {
+        DEBUG(PRLog(kPRLogVerbose,"Read %d bytes:\n",bytesRead));
+        for (i=0; i<bytesRead; i++) {
+            DEBUG(PRLog(kPRLogVerbose,"Read byte: %x\n",buffer[i]));
+        }
+        return (int)bytesRead;
+    }
+    else return 0;
+}
+
+int PRHardwareWrite(uint8_t *buffer, int bytes)
+{
+    FT_STATUS ftStatus=0; 
+    DWORD bytesWritten=0;
+    int i;
+
+    DEBUG(PRLog(kPRLogVerbose,"Writing %d bytes:\n",bytes));
+    ftStatus = FT_Write(ftHandle, buffer, (DWORD)bytes, &bytesWritten);
+    if (ftStatus == FT_OK) 
+    {
+        DEBUG(PRLog(kPRLogVerbose,"Wrote %d bytes:\n",bytesWritten));
+        if (bytesWritten != bytes) DEBUG(PRLog(kPRLogVerbose,"Wrote %d bytes, should have written %d bytes",bytesWritten,bytes));
+        else {
+            for (i=0; i<bytesWritten; i++) {
+                DEBUG(PRLog(kPRLogVerbose,"Wrote byte: %x\n",buffer[i]));
+            }
+        }
+        return (int)bytesWritten;
+    }
+    else return 0;
+}
+
+#endif // D2XX
diff --git a/src/PRHardware.h b/src/PRHardware.h
index bbcee7d..6329f20 100644
--- a/src/PRHardware.h
+++ b/src/PRHardware.h
@@ -29,6 +29,13 @@
 #include <stdint.h>
 #include "../include/pinproc.h"
 
+#if defined(__WIN32__)
+    #include <windows.h>
+    #define PRSleep(milliseconds) Sleep(milliseconds)
+#else
+    #define PRSleep(milliseconds) sleep(milliseconds/1000)
+#endif
+
 const int32_t FTDI_VENDOR_ID = 0x0403;
 const int32_t FTDI_FT245RL_PRODUCT_ID = 0x6001;
 
diff --git a/src/pinproc.cpp b/src/pinproc.cpp
index 3fe7359..d9191dc 100644
--- a/src/pinproc.cpp
+++ b/src/pinproc.cpp
@@ -30,6 +30,7 @@
 
 #include "../include/pinproc.h"
 #include "PRDevice.h"
+#include <stdarg.h>
 
 #define MAX_TEXT (1024)
 
@@ -110,6 +111,18 @@ PR_EXPORT PRResult PRFlushWriteData(PRHandle handle)
     return handleAsDevice->FlushWriteData();
 }
 
+/** Write data out to the P-ROC immediately (does not require a call to PRFlushWriteData */
+PR_EXPORT PRResult PRWriteData(PRHandle handle, uint32_t moduleSelect, uint32_t startingAddr, int32_t numWriteWords, uint32_t * writeBuffer)
+{
+    return handleAsDevice->WriteDataRaw(moduleSelect, startingAddr, numWriteWords, writeBuffer);
+}
+
+/** Read data from the P-ROC. */
+PR_EXPORT PRResult PRReadData(PRHandle handle, uint32_t moduleSelect, uint32_t startingAddr, int32_t numReadWords, uint32_t * readBuffer)
+{
+    return handleAsDevice->ReadDataRaw(moduleSelect, startingAddr, numReadWords, readBuffer);
+}
+
 // Events
 
 /** Get all of the available events that have been received. */