sp0256.c: [Wilbert Pol]

- Added a little delay before settling LRQ when resetting the device. Fixes MT05103.
- When reading the LRQ signal, force an update of the stream. This fixes support for
  'The Voice' in 'Turtles' for the odyssey2.

src/emu/sound/sp0256.c

@@ -1275,6 +1275,9 @@ READ_LINE_DEVICE_HANDLER( sp0256_lrq_r )
 {
 	sp0256_state *sp = get_safe_token(device);
 
+	// force stream update
+	sp->stream->update();
+
 	return sp->lrq == 0x8000;
 }
 
@@ -1282,6 +1285,8 @@ READ_LINE_DEVICE_HANDLER( sp0256_sby_r )
 {
 	sp0256_state *sp = get_safe_token(device);
 
+	// TODO: force stream update??
+
 	return sp->sby_line;
 }
 
@@ -1390,8 +1395,18 @@ void sp0256_device::device_config_complete()
 void sp0256_device::device_start()
 {
 	DEVICE_START_NAME( sp0256 )(this);
+
+	m_lrq_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(sp0256_device::set_lrq_timer_proc),this));
 }
 
+TIMER_CALLBACK_MEMBER(sp0256_device::set_lrq_timer_proc)
+{
+	sp0256_state *sp = get_safe_token(this);
+
+	sp->lrq = 0x8000;
+}
+
+
 //-------------------------------------------------
 //  device_reset - device-specific reset
 //-------------------------------------------------
@@ -1399,6 +1414,10 @@ void sp0256_device::device_start()
 void sp0256_device::device_reset()
 {
 	DEVICE_RESET_NAME( sp0256 )(this);
+
+	sp0256_state *sp = get_safe_token(this);
+	sp->lrq = 0;
+	m_lrq_timer->adjust( attotime::from_ticks( 50, m_clock ) );
 }
 
 //-------------------------------------------------

src/emu/sound/sp0256.h

@@ -79,6 +79,9 @@ public:
 
 	// access to legacy token
 	void *token() const { assert(m_token != NULL); return m_token; }
+
+	TIMER_CALLBACK_MEMBER(set_lrq_timer_proc);
+
 protected:
 	// device-level overrides
 	virtual void device_config_complete();
@@ -90,6 +93,7 @@ protected:
 private:
 	// internal state
 	void *m_token;
+	emu_timer *m_lrq_timer;
 };
 
 extern const device_type SP0256;

src/mess/drivers/odyssey2.c

@@ -333,7 +333,7 @@ WRITE_LINE_MEMBER(odyssey2_state::the_voice_lrq_callback)
 
 READ8_MEMBER(odyssey2_state::t0_read)
 {
-	return sp0256_lrq_r( m_sp0256 ) ? 1 : 0;
+	return sp0256_lrq_r( m_sp0256 ) ? 0 : 1;
 }
 
 
@@ -438,7 +438,6 @@ WRITE8_MEMBER(odyssey2_state::io_write)
 			}
 			else
 			{
-				/* TODO: Reset sp0256 in this case */
 				m_sp0256->reset();
 			}
 		}