Applied the recent mainline PCem commits (and fixed the Pentium machines);

Ported the Roland MT-32 emulation (using MUNT) from bit's MT32 emulation branch of PCem;
Sanitized the OpenAL give buffer code in openal.c a bit;
NVR path is now specifiable in the Settings dialog;
Added Logitech 3-button serial mouse per protocol description by waltje;
The RTL8029AS and the BT-958D now actually use the PCI IRQ routing;
Fixed BT-958D PCI device initialization on the bus;
PCI IRQ routing now respects the edge/level setting set on ports 4D0/4D1.

src/SOUND/munt/FileStream.cpp

@@ -0,0 +1,83 @@
+/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
+ * Copyright (C) 2011-2017 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation, either version 2.1 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "internals.h"
+
+#include "FileStream.h"
+
+namespace MT32Emu {
+
+using std::ios_base;
+
+FileStream::FileStream() : ifsp(*new std::ifstream), data(NULL), size(0)
+{}
+
+FileStream::~FileStream() {
+	// destructor closes ifsp
+	delete &ifsp;
+	delete[] data;
+}
+
+size_t FileStream::getSize() {
+	if (size != 0) {
+		return size;
+	}
+	if (!ifsp.is_open()) {
+		return 0;
+	}
+	ifsp.seekg(0, ios_base::end);
+	size = size_t(ifsp.tellg());
+	return size;
+}
+
+const Bit8u *FileStream::getData() {
+	if (data != NULL) {
+		return data;
+	}
+	if (!ifsp.is_open()) {
+		return NULL;
+	}
+	if (getSize() == 0) {
+		return NULL;
+	}
+	Bit8u *fileData = new Bit8u[size];
+	if (fileData == NULL) {
+		return NULL;
+	}
+	ifsp.seekg(0);
+	ifsp.read(reinterpret_cast<char *>(fileData), std::streamsize(size));
+	if (size_t(ifsp.tellg()) != size) {
+		delete[] fileData;
+		return NULL;
+	}
+	data = fileData;
+	close();
+	return data;
+}
+
+bool FileStream::open(const char *filename) {
+	ifsp.clear();
+	ifsp.open(filename, ios_base::in | ios_base::binary);
+	return !ifsp.fail();
+}
+
+void FileStream::close() {
+	ifsp.close();
+	ifsp.clear();
+}
+
+} // namespace MT32Emu