ht1130: add wake up after halt

src/devices/cpu/ht1130/ht1130.cpp

@@ -6,7 +6,6 @@
     TODO:
     - Interrupts (not used by brke23p2)
     - Sound (needs internal frequency ROM data?)
-    - IO wake-up from HALT etc.
     - 1 machine cycle (eg. a 1 byte opcode) takes 4 system clock cycles (from OSC pins).
     - The timer rate can be configured with a mask option (system clock / 2^n), n=0-13 (except 6 for some reason).
       So, timer rate can be faster or slower than machine cycle rate.
@@ -254,6 +253,7 @@ void ht1130_device::device_start()
 	m_irqen = 0;
 	m_timer_en = 0;
 	m_inhalt = 0;
+	m_wakeline = 0;
 	m_timerover = 0;
 	m_timer = 0;
 	m_comcount = 0;
@@ -265,6 +265,7 @@ void ht1130_device::device_start()
 	save_item(NAME(m_irqen));
 	save_item(NAME(m_timer_en));
 	save_item(NAME(m_inhalt));
+	save_item(NAME(m_wakeline));
 	save_item(NAME(m_timerover));
 	save_item(NAME(m_timer));
 	save_item(NAME(m_comcount));
@@ -1099,4 +1100,16 @@ void ht1130_device::execute_run()
 
 void ht1130_device::execute_set_input(int inputnum, int state)
 {
+	switch (inputnum)
+	{
+	case HT1130_EXT_WAKEUP_LINE:
+		// wake up is edge triggered
+		if (state && !m_wakeline)
+			m_inhalt = 0;
+		m_wakeline = state;
+		break;
+
+	default:
+		break;
+	}
 }

src/devices/cpu/ht1130/ht1130.h

@@ -6,6 +6,10 @@
 
 #pragma once
 
+// when in halt state, inputs (configured by mask option) can wake up the CPU,
+// driver is required to use set_input_line(HT1130_EXT_WAKEUP_LINE, state)
+#define HT1130_EXT_WAKEUP_LINE 0
+
 
 class ht1130_device : public cpu_device
 {
@@ -24,13 +28,15 @@ public:
 		HT1130_TIMER,
 	};
 
+	// I/O ports
 	auto pm_in_cb() { return m_port_in_pm.bind(); }
 	auto ps_in_cb() { return m_port_in_ps.bind(); }
 	auto pp_in_cb() { return m_port_in_pp.bind(); }
 
 	auto pa_out_cb() { return m_port_out_pa.bind(); }
 
-	auto segment_out_cb() { return m_segment_out.bind(); } // COM in offset, SEG in data
+	// LCD output: COM in offset, SEG in data
+	auto segment_out_cb() { return m_segment_out.bind(); }
 
 protected:
 	ht1130_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, address_map_constructor data);
@@ -39,6 +45,8 @@ protected:
 	virtual void device_reset() override;
 
 	virtual void execute_run() override;
+	virtual u32 execute_input_lines() const noexcept override { return 1; }
+	virtual bool execute_input_edge_triggered(int inputnum) const noexcept override { return inputnum == HT1130_EXT_WAKEUP_LINE; }
 	virtual void execute_set_input(int inputnum, int state) override;
 	virtual uint32_t execute_max_cycles() const noexcept override { return 2; }
 
@@ -97,6 +105,7 @@ protected:
 	u8 m_irqen;
 	u8 m_timer_en;
 	u8 m_inhalt;
+	u8 m_wakeline;
 	u8 m_timerover;
 	u16 m_timer;
 

src/mame/handheld/hh_ht11xx.cpp

@@ -47,6 +47,8 @@ public:
 		m_in(*this, "IN%u", 1)
 	{ }
 
+	virtual DECLARE_INPUT_CHANGED_MEMBER(input_wakeup);
+
 	void ht11xx_brickgame(machine_config &config);
 
 protected:
@@ -67,11 +69,16 @@ void hh_ht11xx_state::machine_start()
 	m_out_x.resolve();
 }
 
+INPUT_CHANGED_MEMBER(hh_ht11xx_state::input_wakeup)
+{
+	m_maincpu->set_input_line(HT1130_EXT_WAKEUP_LINE, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
 static INPUT_PORTS_START( ht11xx_brickgame )
 	PORT_START("IN1")
 	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START )
 	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_VOLUME_DOWN ) PORT_NAME("Mute")
-	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_POWER_ON ) PORT_NAME("Power")
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_POWER_ON ) PORT_NAME("Power") PORT_CHANGED_MEMBER(DEVICE_SELF, hh_ht11xx_state, input_wakeup, 0)
 	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_START("IN2") // not a joystick, but buttons are used for directional inputs in the snake game etc.

src/mame/handheld/hh_sm510.cpp

@@ -6277,14 +6277,12 @@ ROM_END
 
 *******************************************************************************/
 
-class nstarfox_state : public hh_sm510_state
+class nstarfox_state : public gamewatch_state
 {
 public:
 	nstarfox_state(const machine_config &mconfig, device_type type, const char *tag) :
-		hh_sm510_state(mconfig, type, tag)
-	{
-		inp_fixed_last();
-	}
+		gamewatch_state(mconfig, type, tag)
+	{ }
 
 	void nstarfox(machine_config &config);