@@ -88,6 +88,8 @@ };
 
 void GBASIOBattlechipGateCreate(struct GBASIOBattlechipGate*);
 
+void GBAEReaderQueueCard(struct GBA* gba, const void* data, size_t size);
+
 CXX_GUARD_END
 
 #endif

@@ -18,6 +18,7 @@ mLOG_DECLARE_CATEGORY(GBA_HW);
 
 #define EREADER_DOTCODE_STRIDE 1200
 #define EREADER_DOTCODE_SIZE (EREADER_DOTCODE_STRIDE * 40 + 200)
+#define EREADER_CARDS_MAX 16
 
 #define IS_GPIO_REGISTER(reg) ((reg) == GPIO_REG_DATA || (reg) == GPIO_REG_DIRECTION || (reg) == GPIO_REG_CONTROL)
 
@@ -133,6 +134,11 @@ EREADER_COMMAND_SET_INDEX = 0x22,
 	EREADER_COMMAND_READ_DATA = 0x23,
 };
 
+struct EReaderCard {
+	void* data;
+	size_t size;
+};
+
 struct GBACartridgeHardware {
 	struct GBA* p;
 	uint32_t devices;
@@ -177,6 +183,7 @@ uint8_t eReaderByte;
 	int eReaderX;
 	int eReaderY;
 	uint8_t* eReaderDots;
+	struct EReaderCard eReaderCards[EREADER_CARDS_MAX];
 };
 
 void GBAHardwareInit(struct GBACartridgeHardware* gpio, uint16_t* gpioBase);

@@ -514,6 +514,19 @@ control = EReaderControl0ClearData(control);
 	}
 	hw->eReaderRegisterControl0 = control;
 	if (!EReaderControl0IsScan(oldControl) && EReaderControl0IsScan(control)) {
+		if (hw->eReaderX > 1000) {
+			int i;
+			for (i = 0; i < EREADER_CARDS_MAX; ++i) {
+				if (!hw->eReaderCards[i].data) {
+					continue;
+				}
+				GBAHardwareEReaderScan(hw, hw->eReaderCards[i].data, hw->eReaderCards[i].size);
+				free(hw->eReaderCards[i].data);
+				hw->eReaderCards[i].data = NULL;
+				hw->eReaderCards[i].size = 0;
+				break;
+			}
+		}
 		hw->eReaderX = 0;
 		hw->eReaderY = 0;
 	} else if (EReaderControl0IsLedEnable(control) && EReaderControl0IsScan(control) && !EReaderControl1IsScanline(hw->eReaderRegisterControl1)) {
@@ -540,6 +553,19 @@ }
 
 void _eReaderReadData(struct GBACartridgeHardware* hw) {
 	memset(hw->eReaderData, 0, EREADER_BLOCK_SIZE);
+	if (!hw->eReaderDots) {
+		int i;
+		for (i = 0; i < EREADER_CARDS_MAX; ++i) {
+			if (!hw->eReaderCards[i].data) {
+				continue;
+			}
+			GBAHardwareEReaderScan(hw, hw->eReaderCards[i].data, hw->eReaderCards[i].size);
+			free(hw->eReaderCards[i].data);
+			hw->eReaderCards[i].data = NULL;
+			hw->eReaderCards[i].size = 0;
+			break;
+		}
+	}
 	if (hw->eReaderDots) {
 		int y = hw->eReaderY - 10;
 		if (y < 0 || y >= 120) {
@@ -579,3 +605,16 @@ }
 		GBARaiseIRQ(hw->p, IRQ_GAMEPAK, -led);
 	}
 }
+
+void GBAEReaderQueueCard(struct GBA* gba, const void* data, size_t size) {	
+	int i;
+	for (i = 0; i < EREADER_CARDS_MAX; ++i) {
+		if (gba->memory.hw.eReaderCards[i].data) {
+			continue;
+		}
+		gba->memory.hw.eReaderCards[i].data = malloc(size);
+		memcpy(gba->memory.hw.eReaderCards[i].data, data, size);
+		gba->memory.hw.eReaderCards[i].size = size;
+		return;
+	}
+}

@@ -51,6 +51,7 @@
 void GBAHardwareInit(struct GBACartridgeHardware* hw, uint16_t* base) {
 	hw->gpioBase = base;
 	hw->eReaderDots = NULL;
+	memset(hw->eReaderCards, 0, sizeof(hw->eReaderCards));
 	GBAHardwareClear(hw);
 
 	hw->gbpCallback.d.readKeys = _gbpRead;
@@ -76,6 +77,15 @@
 	if (hw->eReaderDots) {
 		mappedMemoryFree(hw->eReaderDots, EREADER_DOTCODE_SIZE);
 		hw->eReaderDots = NULL;
+	}
+	int i;
+	for (i = 0; i < EREADER_CARDS_MAX; ++i) {
+		if (!hw->eReaderCards[i].data) {
+			continue;
+		}
+		free(hw->eReaderCards[i].data);
+		hw->eReaderCards[i].data = NULL;
+		hw->eReaderCards[i].size = 0;
 	}
 
 	if (hw->p->sio.drivers.normal == &hw->gbpDriver.d) {

@@ -688,7 +688,7 @@ m_eReaderData = file.read(2912);
 
 	mCoreThreadRunFunction(&m_threadContext, [](mCoreThread* thread) {
 		CoreController* controller = static_cast<CoreController*>(thread->userData);
-		GBAHardwareEReaderScan(&static_cast<GBA*>(thread->core->board)->memory.hw, controller->m_eReaderData.constData(), controller->m_eReaderData.size());
+		GBAEReaderQueueCard(static_cast<GBA*>(thread->core->board), controller->m_eReaderData.constData(), controller->m_eReaderData.size());
 	});
 #endif
 }

@@ -163,6 +163,17 @@ }
 	return filename;
 }
 
+QStringList GBAApp::getOpenFileNames(QWidget* owner, const QString& title, const QString& filter) {
+	QList<Window*> paused;
+	pauseAll(&paused);
+	QStringList filenames = QFileDialog::getOpenFileNames(owner, title, m_configController->getOption("lastDirectory"), filter);
+	continueAll(paused);
+	if (!filenames.isEmpty()) {
+		m_configController->setOption("lastDirectory", QFileInfo(filenames.at(0)).dir().canonicalPath());
+	}
+	return filenames;
+}
+
 QString GBAApp::getSaveFileName(QWidget* owner, const QString& title, const QString& filter) {
 	QList<Window*> paused;
 	pauseAll(&paused);

@@ -59,6 +59,7 @@
 	Window* newWindow();
 
 	QString getOpenFileName(QWidget* owner, const QString& title, const QString& filter = QString());
+	QStringList getOpenFileNames(QWidget* owner, const QString& title, const QString& filter = QString());
 	QString getSaveFileName(QWidget* owner, const QString& title, const QString& filter = QString());
 	QString getOpenDirectoryName(QWidget* owner, const QString& title);
 

@@ -424,8 +424,8 @@ }
 }
 
 void Window::scanCard() {
-	QString filename = GBAApp::app()->getOpenFileName(this, tr("Select e-Reader dotcode"), tr("e-Reader card (*.raw *.bin)"));
-	if (!filename.isEmpty()) {
+	QStringList filenames = GBAApp::app()->getOpenFileNames(this, tr("Select e-Reader dotcode"), tr("e-Reader card (*.raw *.bin)"));
+	for (QString& filename : filenames) {
 		m_controller->scanCard(filename);
 	}
 }
@@ -1126,7 +1126,7 @@ #endif
 
 	addGameAction(tr("Replace ROM..."), "replaceROM", this, &Window::replaceROM, "file");
 #ifdef M_CORE_GBA
-	Action* scanCard = addGameAction(tr("Scan e-Reader dotcode..."), "scanCard", this, &Window::scanCard, "file");
+	Action* scanCard = addGameAction(tr("Scan e-Reader dotcodes..."), "scanCard", this, &Window::scanCard, "file");
 	m_platformActions.insert(PLATFORM_GBA, scanCard);
 #endif