@@ -49,22 +49,33 @@ }
 
 	setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
-	m_margins = QMargins(metrics.width("FFFFFF ") + 3, m_cellHeight + 1, metrics.width(" AAAAAAAAAAAAAAAA") + 3, 0);
+	m_margins = QMargins(metrics.width("FFFFFF ") + 4, m_cellHeight + 1, metrics.width(" AAAAAAAAAAAAAAAA") + 3, 0);
 
-	verticalScrollBar()->setRange(0, 0x01000001 - viewport()->size().height() / m_cellHeight);
 	connect(verticalScrollBar(), &QSlider::sliderMoved, [this](int position) {
 		m_top = position;
 		update();
 	});
-	update();
+
+	setRegion(0, 0x10000000, tr("All"));
 }
 
 void MemoryModel::setController(GameController* controller) {
 	m_cpu = controller->thread()->cpu;
 }
 
+void MemoryModel::setRegion(uint32_t base, uint32_t size, const QString& name) {
+	m_top = 0;
+	m_base = base;
+	m_size = size;
+	m_regionName = name;
+	m_regionName.prepare(QTransform(), m_font);
+	verticalScrollBar()->setRange(0, (size >> 4) + 1 - viewport()->size().height() / m_cellHeight);
+	verticalScrollBar()->setValue(0);
+	viewport()->update();
+}
+
 void MemoryModel::resizeEvent(QResizeEvent*) {
-	verticalScrollBar()->setRange(0, 0x01000001 - viewport()->size().height() / m_cellHeight);
+	verticalScrollBar()->setRange(0, (m_size >> 4) + 1 - viewport()->size().height() / m_cellHeight);
 	boundsCheck();
 }
 
@@ -74,7 +85,7 @@ painter.setFont(m_font);
 	QChar c0('0');
 	QSizeF cellSize = QSizeF((viewport()->size().width() - (m_margins.left() + m_margins.right())) / 16.f, m_cellHeight);
 	QSizeF letterSize = QSizeF(m_letterWidth, m_cellHeight);
-	painter.drawText(QRect(QPoint(0, 0), QSize(m_margins.left(), m_margins.top())), Qt::AlignHCenter, tr("All"));
+	painter.drawStaticText(QPointF((m_margins.left() - m_regionName.size().width() - 1) / 2.0, 0), m_regionName);
 	painter.drawText(QRect(QPoint(viewport()->size().width() - m_margins.right(), 0), QSize(m_margins.right(), m_margins.top())), Qt::AlignHCenter, tr("ASCII"));
 	for (int x = 0; x < 16; ++x) {
 		painter.drawText(QRectF(QPointF(cellSize.width() * x + m_margins.left(), 0), cellSize), Qt::AlignHCenter, QString::number(x, 16).toUpper());
@@ -82,10 +93,10 @@ }
 	int height = (viewport()->size().height() - m_cellHeight) / m_cellHeight;
 	for (int y = 0; y < height; ++y) {
 		int yp = m_cellHeight * y + m_margins.top();
-		QString data = QString("%0").arg(y + m_top, 6, 16, c0).toUpper();
+		QString data = QString("%0").arg(y + m_top + m_base / 16, 6, 16, c0).toUpper();
 		painter.drawText(QRectF(QPointF(0, yp), QSizeF(m_margins.left(), m_cellHeight)), Qt::AlignHCenter, data);
 		for (int x = 0; x < 16; ++x) {
-			uint8_t b = m_cpu->memory.load8(m_cpu, (y + m_top) * 16 + x, nullptr);
+			uint8_t b = m_cpu->memory.load8(m_cpu, (y + m_top) * 16 + x + m_base, nullptr);
 			painter.drawStaticText(QPointF(cellSize.width() * (x + 0.5) - m_letterWidth + m_margins.left(), yp), m_staticNumbers[b]);
 			painter.drawStaticText(QPointF(viewport()->size().width() - (16 - x) * m_margins.right() / 17.0 - m_letterWidth * 0.5, yp), b < 0x80 ? m_staticAscii[b] : m_staticAscii[0]);
 		}
@@ -99,14 +110,14 @@ void MemoryModel::wheelEvent(QWheelEvent* event) {
 	m_top -= event->angleDelta().y() / 8;
 	boundsCheck();
 	event->accept();
+	verticalScrollBar()->setValue(m_top);
 	update();
-	QAbstractScrollArea::wheelEvent(event);
 }
 
 void MemoryModel::boundsCheck() {
 	if (m_top < 0) {
 		m_top = 0;
-	} else if (m_top > 0x01000001 - viewport()->size().height() / m_cellHeight) {
-		m_top = 0x01000001 - viewport()->size().height() / m_cellHeight;
+	} else if (m_top > (m_size >> 4) + 1 - viewport()->size().height() / m_cellHeight) {
+		m_top = (m_size >> 4) + 1 - viewport()->size().height() / m_cellHeight;
 	}
 }

@@ -26,6 +26,8 @@ MemoryModel(QWidget* parent = nullptr);
 
 	void setController(GameController* controller);
 
+	void setRegion(uint32_t base, uint32_t size, const QString& name = QString());
+
 protected:
 	void resizeEvent(QResizeEvent*) override;
 	void paintEvent(QPaintEvent*) override;
@@ -38,10 +40,13 @@ ARMCore* m_cpu;
 	QFont m_font;
 	int m_cellHeight;
 	int m_letterWidth;
+	uint32_t m_base;
+	uint32_t m_size;
 	int m_top;
 	QMargins m_margins;
 	QVector<QStaticText> m_staticNumbers;
 	QVector<QStaticText> m_staticAscii;
+	QStaticText m_regionName;
 };
 
 }

@@ -8,6 +8,10 @@ #include "MemoryView.h"
 
 #include "GameController.h"
 
+extern "C" {
+#include "gba/memory.h"
+}
+
 using namespace QGBA;
 
 MemoryView::MemoryView(GameController* controller, QWidget* parent)
@@ -17,5 +21,31 @@ {
 	m_ui.setupUi(this);
 
 	m_ui.hexfield->setController(controller);
+
+	connect(m_ui.regions, SIGNAL(currentIndexChanged(int)), this, SLOT(setIndex(int)));
+
 	connect(controller, SIGNAL(gameStopped(GBAThread*)), this, SLOT(close()));
 }
+
+void MemoryView::setIndex(int index) {
+	static struct {
+		const char* name;
+		uint32_t base;
+		uint32_t size;
+	} indexInfo[] = {
+		{ "All", 0, 0x10000000 },
+		{ "BIOS", BASE_BIOS, SIZE_BIOS },
+		{ "EWRAM", BASE_WORKING_RAM, SIZE_WORKING_RAM },
+		{ "IWRAM", BASE_WORKING_IRAM, SIZE_WORKING_IRAM },
+		{ "MMIO", BASE_IO, SIZE_IO },
+		{ "Palette", BASE_PALETTE_RAM, SIZE_PALETTE_RAM },
+		{ "VRAM", BASE_VRAM, SIZE_VRAM },
+		{ "OAM", BASE_OAM, SIZE_OAM },
+		{ "ROM", BASE_CART0, SIZE_CART0 },
+		{ "ROM (WS1)", BASE_CART1, SIZE_CART1 },
+		{ "ROM (WS2)", BASE_CART2, SIZE_CART2 },
+		{ "SRAM", BASE_CART_SRAM, SIZE_CART_SRAM },
+	};
+	const auto& info = indexInfo[index];
+	m_ui.hexfield->setRegion(info.base, info.size, info.name);
+}

@@ -20,6 +20,9 @@
 public:
 	MemoryView(GameController* controller, QWidget* parent = nullptr);
 
+private slots:
+	void setIndex(int);
+
 private:
 	Ui::MemoryView m_ui;
 

@@ -15,7 +15,112 @@ <string>Memory</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="QGBA::MemoryModel" name="hexfield" native="true"/>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QComboBox" name="regions">
+       <item>
+        <property name="text">
+         <string>All</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>BIOS (16kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Working RAM (256kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Internal Working RAM (32kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Memory-Mapped I/O</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Palette RAM (1kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Video RAM (96kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>OBJ Attribute Memory (1kiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Game Pak (32MiB)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Game Pak (Waitstate 1)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Game Pak (Waitstate 2)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Static RAM (64kiB)</string>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Inspect Address</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="lineEdit">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="maxLength">
+        <number>10</number>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QGBA::MemoryModel" name="hexfield" native="true">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+    </widget>
    </item>
   </layout>
  </widget>