SCI: Added comments to the FB-01 and MIDI drivers. The original driver files are only

needed in SCI0 early games, which didn't include separate sound patch resources. Thanks
to waltervn for the information he supplied

svn-id: r55875

2 files changed, 8 insertions, 0 deletions

diff --git a/engines/sci/sound/drivers/fb01.cpp b/engines/sci/sound/drivers/fb01.cpp
index 7560c62f4f..ce48b7f1f8 100644
--- a/engines/sci/sound/drivers/fb01.cpp
+++ b/engines/sci/sound/drivers/fb01.cpp
@@ -486,6 +486,11 @@ int MidiPlayer_Fb01::open(ResourceManager *resMan) {
 	if (res) {
 		sendBanks(res->data, res->size);
 	} else {
+		// Early SCI0 games have the sound bank embedded in the IMF driver.
+		// Note that these games didn't actually support the FB-01 as a device,
+		// but the IMF, which is the same device on an ISA card. Check:
+		// http://wiki.vintage-computer.com/index.php/IBM_Music_feature_card
+
 		warning("FB-01 patch file not found, attempting to load sound bank from IMF.DRV");
 		// Try to load sound bank from IMF.DRV
 		Common::File f;
diff --git a/engines/sci/sound/drivers/midi.cpp b/engines/sci/sound/drivers/midi.cpp
index b9a973ad7d..08e93d3213 100644
--- a/engines/sci/sound/drivers/midi.cpp
+++ b/engines/sci/sound/drivers/midi.cpp
@@ -878,6 +878,7 @@ int MidiPlayer_Midi::open(ResourceManager *resMan) {
 				readMt32Patch(res->data, res->size);
 			}
 		} else {
+			// Early SCI0 games have the sound bank embedded in the MT-32 driver
 			readMt32DrvData();
 		}
 	} else {
@@ -940,6 +941,8 @@ int MidiPlayer_Midi::open(ResourceManager *resMan) {
 					}
 				}
 			} else {
+				// Early SCI0 games have the sound bank embedded in the MT-32 driver
+
 				// No MT-32 patch present, try to read from MT32.DRV
 				Common::File f;