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/mouse.c

@@ -17,6 +17,7 @@ static mouse_t *mouse_list[] = {
     &mouse_amstrad,		/* 4 Amstrad PC System Mouse */
     &mouse_olim24,		/* 5 Olivetti M24 System Mouse */
     &mouse_msystems,		/* 6 Mouse Systems */
+    &mouse_serial_logitech,	/* 0 Logitech 3-button Serial Mouse */
 #if 0
     &mouse_genius,		/* 7 Genius Bus Mouse */
 #endif