per-channel oscilloscope, part 7

YM2610 and YM2610B
only TIA is left

src/engine/platform/sound/ymfm/ymfm_adpcm.h

@@ -203,11 +203,15 @@ public:
 	// return a reference to our registers
 	adpcm_a_registers &regs() { return m_regs; }
 
+  // debug functions
+  adpcm_a_channel* debug_channel(uint32_t index) const { return m_channel[index].get(); }
+
 private:
 	// internal state
 	ymfm_interface &m_intf;                                 // reference to the interface
 	std::unique_ptr<adpcm_a_channel> m_channel[CHANNELS]; // array of channels
 	adpcm_a_registers m_regs;                             // registers
+  int32_t m_last_out[CHANNELS];                         // last output of channels
 };
 
 

src/engine/platform/sound/ymfm/ymfm_opn.h

@@ -697,6 +697,12 @@ public:
 	// generate one sample of sound
 	void generate(output_data *output, uint32_t numsamples = 1);
 
+  // get the engine
+  fm_engine* debug_fm_engine() { return &m_fm; }
+  ssg_engine* debug_ssg_engine() { return &m_ssg; }
+  adpcm_a_engine* debug_adpcm_a_engine() { return &m_adpcm_a; }
+  adpcm_b_engine* debug_adpcm_b_engine() { return &m_adpcm_b; }
+
 protected:
 	// internal helpers
 	void update_prescale();

src/engine/platform/sound/ymfm/ymfm_ssg.cpp

@@ -232,6 +232,8 @@ void ssg_engine::output(output_data &output)
 		// convert to amplitude
 		output.data[chan] = s_amplitudes[volume];
 	}
+
+  m_last_out=output;
 }
 
 

src/engine/platform/sound/ymfm/ymfm_ssg.h

@@ -187,6 +187,9 @@ public:
 	// indicate the prescale has changed
 	void prescale_changed() { if (m_override != nullptr) m_override->ssg_prescale_changed(); }
 
+  // get the last output
+  void get_last_out(output_data& out) { out=m_last_out; }
+
 private:
 	// internal state
 	ymfm_interface &m_intf;                   // reference to the interface
@@ -198,6 +201,7 @@ private:
 	uint32_t m_noise_state;                 // current noise state
 	ssg_registers m_regs;                   // registers
 	ssg_override *m_override;               // override interface
+  output_data m_last_out;
 };
 
 }