bus/ata: Do slot output signals the sensible way (fixes GitHub #11346).

src/devices/bus/ata/atadev.cpp

@@ -20,10 +20,7 @@
 
 device_ata_interface::device_ata_interface(const machine_config &mconfig, device_t &device) :
 	device_interface(device, "ata"),
-	m_irq_handler(device),
+	m_slot(dynamic_cast<ata_slot_device *>(device.owner()))
-	m_dmarq_handler(device),
-	m_dasp_handler(device),
-	m_pdiag_handler(device)
 {
 }
 
@@ -42,6 +39,10 @@ DEFINE_DEVICE_TYPE(ATA_SLOT, ata_slot_device, "ata_slot", "ATA Connector")
 ata_slot_device::ata_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
 	device_t(mconfig, ATA_SLOT, tag, owner, clock),
 	device_single_card_slot_interface<device_ata_interface>(mconfig, *this),
+	m_irq_handler(*this),
+	m_dmarq_handler(*this),
+	m_dasp_handler(*this),
+	m_pdiag_handler(*this),
 	m_dev(nullptr)
 {
 }

src/devices/bus/ata/atadev.h

@@ -13,14 +13,43 @@
 
 #pragma once
 
+class device_ata_interface;
 
-// ======================> device_ata_interface
 
-class ata_interface_device;
+class ata_slot_device :
+		public device_t,
+		public device_single_card_slot_interface<device_ata_interface>
+{
+public:
+	// construction/destruction
+	ata_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+
+	auto irq_handler() { return m_irq_handler.bind(); }
+	auto dmarq_handler() { return m_dmarq_handler.bind(); }
+	auto dasp_handler() { return m_dasp_handler.bind(); }
+	auto pdiag_handler() { return m_pdiag_handler.bind(); }
+
+	device_ata_interface *dev() { return m_dev; }
+
+protected:
+	// device_t implementation
+	virtual void device_config_complete() override;
+	virtual void device_start() override;
+
+private:
+	devcb_write_line m_irq_handler;
+	devcb_write_line m_dmarq_handler;
+	devcb_write_line m_dasp_handler;
+	devcb_write_line m_pdiag_handler;
+
+	device_ata_interface *m_dev;
+
+	friend class device_ata_interface;
+};
+
 
 class device_ata_interface : public device_interface
 {
-	friend class abstract_ata_interface_device;
 public:
 	virtual uint16_t read_dma() = 0;
 	virtual uint16_t read_cs0(offs_t offset, uint16_t mem_mask = 0xffff) = 0;
@@ -38,33 +67,17 @@ public:
 protected:
 	device_ata_interface(const machine_config &mconfig, device_t &device);
 
-	devcb_write_line m_irq_handler;
+	void set_irq(int state) { m_slot->m_irq_handler(state); }
-	devcb_write_line m_dmarq_handler;
+	void set_dmarq(int state) { m_slot->m_dmarq_handler(state); }
-	devcb_write_line m_dasp_handler;
+	void set_dasp(int state) { m_slot->m_dasp_handler(state); }
-	devcb_write_line m_pdiag_handler;
+	void set_pdiag(int state) { m_slot->m_pdiag_handler(state); }
-};
-
-// ======================> ata_slot_device
-
-class ata_slot_device : public device_t,
-						public device_single_card_slot_interface<device_ata_interface>
-{
-public:
-	// construction/destruction
-	ata_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
-
-	device_ata_interface *dev() { return m_dev; }
-
-protected:
-	// device-level overrides
-	virtual void device_start() override;
-	virtual void device_config_complete() override;
 
 private:
-	device_ata_interface *m_dev;
+	ata_slot_device *const m_slot;
 };
 
-// device type definition
+
+// device type declaration
 DECLARE_DEVICE_TYPE(ATA_SLOT, ata_slot_device)
 
 void ata_devices(device_slot_interface &device);

src/devices/bus/ata/atahle.cpp

@@ -40,8 +40,8 @@ enum
 #define DEVICE1_PDIAG_TIME                  (attotime::from_msec(2))
 #define DIAGNOSTIC_TIME                     (attotime::from_msec(2))
 
-ata_hle_device::ata_hle_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+ata_hle_device::ata_hle_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
-	: device_t(mconfig, type, tag, owner, clock),
+	device_t(mconfig, type, tag, owner, clock),
 	device_ata_interface(mconfig, *this),
 	m_buffer_offset(0),
 	m_buffer_size(0),
@@ -396,9 +396,9 @@ void ata_hle_device::write_data(uint16_t data)
 void ata_hle_device::update_irq()
 {
 	if (device_selected() && (m_device_control & IDE_DEVICE_CONTROL_NIEN) == 0)
-		m_irq_handler(m_irq);
+		device_ata_interface::set_irq(m_irq);
 	else
-		m_irq_handler(CLEAR_LINE);
+		device_ata_interface::set_irq(CLEAR_LINE);
 }
 
 void ata_hle_device::set_irq(int state)
@@ -417,7 +417,7 @@ void ata_hle_device::set_dmarq(int state)
 	{
 		m_dmarq = state;
 
-		m_dmarq_handler(state);
+		device_ata_interface::set_dmarq(state);
 	}
 }
 
@@ -427,7 +427,7 @@ void ata_hle_device::set_dasp(int state)
 	{
 		m_daspout = state;
 
-		m_dasp_handler(state);
+		device_ata_interface::set_dasp(state);
 	}
 }
 
@@ -437,7 +437,7 @@ void ata_hle_device::set_pdiag(int state)
 	{
 		m_pdiagout = state;
 
-		m_pdiag_handler(state);
+		device_ata_interface::set_pdiag(state);
 	}
 }
 

src/devices/bus/ata/ataintf.cpp

@@ -237,28 +237,11 @@ void abstract_ata_interface_device::device_start()
 		m_dasp[i] = 0;
 		m_pdiag[i] = 0;
 
-		device_ata_interface *dev = m_slot[i]->dev();
+		device_ata_interface *const dev = m_slot[i]->dev();
 		if (dev)
-		{
-			if (i == 0)
-			{
-				dev->m_irq_handler.bind().set(*this, FUNC(abstract_ata_interface_device::irq0_write_line));
-				dev->m_dmarq_handler.bind().set(*this, FUNC(abstract_ata_interface_device::dmarq0_write_line));
-				dev->m_dasp_handler.bind().set(*this, FUNC(abstract_ata_interface_device::dasp0_write_line));
-				dev->m_pdiag_handler.bind().set(*this, FUNC(abstract_ata_interface_device::pdiag0_write_line));
-			}
-			else
-			{
-				dev->m_irq_handler.bind().set(*this, FUNC(abstract_ata_interface_device::irq1_write_line));
-				dev->m_dmarq_handler.bind().set(*this, FUNC(abstract_ata_interface_device::dmarq1_write_line));
-				dev->m_dasp_handler.bind().set(*this, FUNC(abstract_ata_interface_device::dasp1_write_line));
-				dev->m_pdiag_handler.bind().set(*this, FUNC(abstract_ata_interface_device::pdiag1_write_line));
-			}
-
 			dev->write_csel(i);
 	}
 }
-}
 
 
 //-------------------------------------------------
@@ -267,6 +250,15 @@ void abstract_ata_interface_device::device_start()
 
 void abstract_ata_interface_device::device_add_mconfig(machine_config &config)
 {
-	for (size_t slot = 0; slot < SLOT_COUNT; slot++)
+	ATA_SLOT(config, m_slot[0]);
-		ATA_SLOT(config, m_slot[slot]);
+	m_slot[0]->irq_handler().set(FUNC(abstract_ata_interface_device::irq0_write_line));
+	m_slot[0]->dmarq_handler().set(FUNC(abstract_ata_interface_device::dmarq0_write_line));
+	m_slot[0]->dasp_handler().set(FUNC(abstract_ata_interface_device::dasp0_write_line));
+	m_slot[0]->pdiag_handler().set(FUNC(abstract_ata_interface_device::pdiag0_write_line));
+
+	ATA_SLOT(config, m_slot[1]);
+	m_slot[1]->irq_handler().set(FUNC(abstract_ata_interface_device::irq1_write_line));
+	m_slot[1]->dmarq_handler().set(FUNC(abstract_ata_interface_device::dmarq1_write_line));
+	m_slot[1]->dasp_handler().set(FUNC(abstract_ata_interface_device::dasp1_write_line));
+	m_slot[1]->pdiag_handler().set(FUNC(abstract_ata_interface_device::pdiag1_write_line));
 }

src/emu/devcb.h

@@ -861,6 +861,7 @@ devcb_read<Result, DefaultMask>::devcb_read(device_t &owner, Result dflt)
 template <typename Result, std::make_unsigned_t<Result> DefaultMask>
 typename devcb_read<Result, DefaultMask>::binder devcb_read<Result, DefaultMask>::bind()
 {
+	assert(m_functions.empty());
 	return binder(*this);
 }
 
@@ -2380,6 +2381,7 @@ devcb_write<Input, DefaultMask>::devcb_write(device_t &owner)
 template <typename Input, std::make_unsigned_t<Input> DefaultMask>
 typename devcb_write<Input, DefaultMask>::binder devcb_write<Input, DefaultMask>::bind()
 {
+	assert(m_functions.empty());
 	return binder(*this);
 }