Ticket #3804: DOTT_MT-32_Hardware_Lockup_MIDI_Commands.diff

backends/midi/camd.cpp

@@ -29 +29 @@
 #include "common/textconsole.h"
 #include "common/error.h"
 #include "common/endian.h"
+#include "common/system.h"
 #include "common/util.h"
 #include "audio/musicplugin.h"
 #include "audio/mpu401.h"
@@ -119 +120 @@
         }
 
         ULONG data = READ_LE_UINT32(&b);
+        // FIXME: Due to a hardware bug in early MT-32 devices Notes/Sysexes
+        // need to be sent with a delay of 40 ms between every message.
+        // (At least that's what Wikipedia states.)
+        // It works if i set an extra delay of 1(!) ms right before every data transmission
+        // which makes me think such a delay is already somewhere in the source but just
+        // not enough to make my problem go away - hence the 1 ms delay i need to add.
+        //
+        // This fixes bug #2016549 DOTT: MIDI stuck after exploding cigar
+        g_system->delayMillis(1);
         _ICamd->PutMidi(_midi_link, data);
 }