--- a/src/hardware/dbopl.cpp
+++ b/src/hardware/dbopl.cpp
@@ -1086,14 +1086,14 @@ void Chip::WriteBD( Bit8u val ) {
 #define REGOP( _FUNC_ )															\
 	index = ( ( reg >> 3) & 0x20 ) | ( reg & 0x1f );								\
 	if ( OpOffsetTable[ index ] ) {													\
-		Operator* regOp = (Operator*)( ((char *)this ) + OpOffsetTable[ index ] );	\
+		Operator* regOp = (Operator*)( ((char *)this ) + OpOffsetTable[ index ]-1 );	\
 		regOp->_FUNC_( this, val );													\
 	}

 #define REGCHAN( _FUNC_ )																\
 	index = ( ( reg >> 4) & 0x10 ) | ( reg & 0xf );										\
 	if ( ChanOffsetTable[ index ] ) {													\
-		Channel* regChan = (Channel*)( ((char *)this ) + ChanOffsetTable[ index ] );	\
+		Channel* regChan = (Channel*)( ((char *)this ) + ChanOffsetTable[ index ]-1 );	\
 		regChan->_FUNC_( this, val );													\
 	}

@@ -1444,7 +1444,7 @@ void InitTables( void ) {
 		//Add back the bits for highest ones
 		if ( i >= 16 )
 			index += 9;
-		ChanOffsetTable[i] = (Bit16u)(index*sizeof(DBOPL::Channel));
+		ChanOffsetTable[i] = 1+(Bit16u)(index*sizeof(DBOPL::Channel));
 	}
 	//Same for operators
 	for ( Bitu i = 0; i < 64; i++ ) {
@@ -1460,11 +1460,12 @@ void InitTables( void ) {
 		OpOffsetTable[i] = ChanOffsetTable[chNum]+(Bit16u)(opNum*sizeof(DBOPL::Operator));
 	}
 #if 0
+	DBOPL::Chip* chip = 0;
 	//Stupid checks if table's are correct
 	for ( Bitu i = 0; i < 18; i++ ) {
 		Bit32u find = (Bit16u)( &(chip->chan[ i ]) );
 		for ( Bitu c = 0; c < 32; c++ ) {
-			if ( ChanOffsetTable[c] == find ) {
+			if ( ChanOffsetTable[c] == find+1 ) {
 				find = 0;
 				break;
 			}
@@ -1476,7 +1477,7 @@ void InitTables( void ) {
 	for ( Bitu i = 0; i < 36; i++ ) {
 		Bit32u find = (Bit16u)( &(chip->chan[ i / 2 ].op[i % 2]) );
 		for ( Bitu c = 0; c < 64; c++ ) {
-			if ( OpOffsetTable[c] == find ) {
+			if ( OpOffsetTable[c] == find+1 ) {
 				find = 0;
 				break;
 			}