diff --git a/mainwindow.cpp b/mainwindow.cpp
index c7a813d..f42eb38 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -83,7 +83,7 @@ void MainWindow::on_btn_binUpload_clicked()
         MESSAGE_BOX("Invalid input format for offset");
         return;
     }
-    _settings->setValue(BIN_OFFSET, offset);
+    _settings->setValue(BIN_OFFSET, ui->tb_binOffset->text());
     _settings->setValue(BIN_BAR_INDEX, ui->cb_binBarNum->currentIndex());
 
     auto path = ui->tb_binFile->text();
@@ -107,7 +107,7 @@ void MainWindow::on_btn_binVerify_clicked()
         MESSAGE_BOX("Invalid input format for offset");
         return;
     }
-    _settings->setValue(BIN_OFFSET, offset);
+    _settings->setValue(BIN_OFFSET, ui->tb_binOffset->text());
     _settings->setValue(BIN_BAR_INDEX, ui->cb_binBarNum->currentIndex());
 
     auto path = ui->tb_binFile->text();
@@ -329,7 +329,7 @@ void MainWindow::on_rbtn_reg_toggled(bool checked)
     if(checked)
     {
         _settings->setValue(REG_ACCESS_SEL, true);
-        ui->l_regIndicator->setText("Register number: (Dec)");
+        ui->l_regIndicator->setText("Register number: (Hex)");
     }
 }
 
@@ -348,21 +348,41 @@ void MainWindow::on_btn_readReg_clicked()
 {
     auto bar = ui->cb_regBarNum->currentText().toUInt();
 
-    quint32 offset = 0;
-    if(ui->rbtn_reg->isChecked())
-        offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 10) * 4;
-    else
-        offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 16);
-
+    auto offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 16);
     if(offset == 0 && ui->tb_regIndicator->text() != "0")
     {
         MESSAGE_BOX("Invalid input format for offset");
         return;
     }
 
-    auto value = _usd->readWord(offset, bar);
+    quint64 value = 0;
+    auto width = ui->cb_regWidth->currentIndex();
+    switch(width)
+    {
+    case 0:
+        value = _usd->readByte(offset, bar);
+        ui->lcd_regvalue->setDigitCount(2);
+        break;
+    case 1:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 2;
+        value = _usd->readShort(offset, bar);
+        ui->lcd_regvalue->setDigitCount(4);
+        break;
+    case 2:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 4;
+        value = _usd->readWord(offset, bar);
+        ui->lcd_regvalue->setDigitCount(8);
+        break;
+    case 3:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 8;
+        value = _usd->readLong(offset, bar);
+        ui->lcd_regvalue->setDigitCount(16);
+        break;
+    }
 
-    ui->lcd_regvalue->setDigitCount(8);
     ui->lcd_regvalue->display(QString::number(value, 16));
 }
 
@@ -371,26 +391,42 @@ void MainWindow::on_btn_writeReg_clicked()
 {
     auto bar = ui->cb_regBarNum->currentText().toUInt();
 
-    quint32 offset = 0;
-    if(ui->rbtn_reg->isChecked())
-        offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 10) * 4;
-    else
-        offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 16);
-
+    auto offset = ui->tb_regIndicator->text().toUInt(Q_NULLPTR, 16);
     if(offset == 0 && ui->tb_regIndicator->text() != "0")
     {
         MESSAGE_BOX("Invalid input format for offset");
         return;
     }
 
-    auto value = ui->tb_regValue->text().toUInt(Q_NULLPTR, 16);
+    auto value = ui->tb_regValue->text().toULong(Q_NULLPTR, 16);
     if(value == 0 && ui->tb_regValue->text() != "0")
     {
         MESSAGE_BOX("Invalid input format for write value");
         return;
     }
 
-    _usd->writeWord(offset, bar, value);
+    auto width = ui->cb_regWidth->currentIndex();
+    switch(width)
+    {
+    case 0:
+        _usd->writeByte(offset, bar, value);
+        break;
+    case 1:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 2;
+        _usd->writeShort(offset, bar, value);
+        break;
+    case 2:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 4;
+        _usd->writeWord(offset, bar, value);
+        break;
+    case 3:
+        if(ui->rbtn_reg->isChecked())
+            offset *= 8;
+        _usd->writeLong(offset, bar, value);
+        break;
+    }
 }
 
 /*************************************************************************************************/
@@ -435,8 +471,8 @@ void MainWindow::on_btn_fpgaBrowse_clicked()
 /*************************************************************************************************/
 void MainWindow::on_btn_fpgaProgram_clicked()
 {
-    auto bar = 1;
-    auto offset = 1000;
+    auto bar = 0;
+    auto offset = 0x4;
 
     auto path = ui->tb_fpgaBit->text();
 
diff --git a/mainwindow.ui b/mainwindow.ui
index fbd116b..2727381 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -341,6 +341,49 @@
          </item>
         </layout>
        </widget>
+       <widget class="QLabel" name="label_6">
+        <property name="geometry">
+         <rect>
+          <x>460</x>
+          <y>50</y>
+          <width>121</width>
+          <height>17</height>
+         </rect>
+        </property>
+        <property name="text">
+         <string>Transaction width:</string>
+        </property>
+       </widget>
+       <widget class="QComboBox" name="cb_regWidth">
+        <property name="geometry">
+         <rect>
+          <x>480</x>
+          <y>70</y>
+          <width>86</width>
+          <height>25</height>
+         </rect>
+        </property>
+        <item>
+         <property name="text">
+          <string>8</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>16</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>32</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>64</string>
+         </property>
+        </item>
+       </widget>
       </widget>
      </item>
      <item>