--- hatari/src/uae-cpu/hatari-glue.c	2019/04/09 08:48:48	1.1.1.15
+++ hatari/src/uae-cpu/hatari-glue.c	2019/04/09 08:50:33	1.1.1.17
@@ -21,11 +21,14 @@ const char HatariGlue_fileid[] = "Hatari
 #include "vdi.h"
 #include "stMemory.h"
 #include "ikbd.h"
+#include "screen.h"
 #include "video.h"
+#include "psg.h"
 
 #include "sysdeps.h"
 #include "maccess.h"
 #include "memory.h"
+#include "m68000.h"
 #include "newcpu.h"
 #include "hatari-glue.h"
 
@@ -48,6 +51,9 @@ void customreset(void)
 
 	/* Reseting the GLUE video chip should also set freq/res register to 0 */
 	Video_Reset_Glue ();
+
+	/* Reset the YM2149 (stop any sound) */
+	PSG_Reset ();
 }
 
 
@@ -170,11 +176,22 @@ unsigned long OpCode_GemDos(uae_u32 opco
  */
 unsigned long OpCode_VDI(uae_u32 opcode)
 {
-	VDI_Complete();
+	Uint32 pc = M68000_GetPC();
 
-	/* Set PC back to where originated from to continue instruction decoding */
-	m68k_setpc(VDI_OldPC);
+	/* this is valid only after VDI trap, called from cartridge code */
+	if (VDI_OldPC && pc >= 0xfa0000 && pc < 0xfc0000)
+	{
+		VDI_Complete();
 
+		/* Set PC back to where originated from to continue instruction decoding */
+		m68k_setpc(VDI_OldPC);
+		VDI_OldPC = 0;
+	}
+	else
+	{
+		/* illegal instruction */
+		op_illg(opcode);
+	}
 	fill_prefetch_0();
 	return 4;
 }