1 files changed, 94 insertions, 0 deletions
diff --git a/src/devices/machine/tube.h b/src/devices/machine/tube.h
new file mode 100644
index 00000000000..ffa27bac813
--- /dev/null
+++ b/src/devices/machine/tube.h
@@ -0,0 +1,94 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+    Acorn Tube ULA emulation
+
+**********************************************************************/
+
+#ifndef MAME_MACHINE_TUBE_H
+#define MAME_MACHINE_TUBE_H
+
+#pragma once
+
+
+
+//**************************************************************************
+//  INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_TUBE_ADD(_tag) \
+	MCFG_DEVICE_ADD(_tag, TUBE, 0);
+
+#define MCFG_TUBE_HIRQ_HANDLER(_devcb) \
+	devcb = &tube_device::set_hirq_handler(*device, DEVCB_##_devcb);
+
+#define MCFG_TUBE_PNMI_HANDLER(_devcb) \
+	devcb = &tube_device::set_pnmi_handler(*device, DEVCB_##_devcb);
+
+#define MCFG_TUBE_PIRQ_HANDLER(_devcb) \
+	devcb = &tube_device::set_pirq_handler(*device, DEVCB_##_devcb);
+
+#define MCFG_TUBE_DRQ_HANDLER(_devcb) \
+	devcb = &tube_device::set_drq_handler(*device, DEVCB_##_devcb);
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+
+// ======================> tube_device
+
+class tube_device : public device_t
+{
+public:
+	// construction/destruction
+	tube_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	// callbacks
+	template <class Object> static devcb_base &set_hirq_handler(device_t &device, Object &&cb) { return downcast<tube_device &>(device).m_hirq_handler.set_callback(std::forward<Object>(cb)); }
+	template <class Object> static devcb_base &set_pnmi_handler(device_t &device, Object &&cb) { return downcast<tube_device &>(device).m_pnmi_handler.set_callback(std::forward<Object>(cb)); }
+	template <class Object> static devcb_base &set_pirq_handler(device_t &device, Object &&cb) { return downcast<tube_device &>(device).m_pirq_handler.set_callback(std::forward<Object>(cb)); }
+	template <class Object> static devcb_base &set_drq_handler(device_t &device, Object &&cb) { return downcast<tube_device &>(device).m_drq_handler.set_callback(std::forward<Object>(cb)); }
+
+	DECLARE_READ8_MEMBER(host_r);
+	DECLARE_WRITE8_MEMBER(host_w);
+	DECLARE_READ8_MEMBER(parasite_r);
+	DECLARE_WRITE8_MEMBER(parasite_w);
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+private:
+	uint8_t m_ph1[24];
+	uint8_t m_ph2;
+	uint8_t m_ph3[2];
+	uint8_t m_ph4;
+	uint8_t m_hp1;
+	uint8_t m_hp2;
+	uint8_t m_hp3[2];
+	uint8_t m_hp4;
+	uint8_t m_hstat[4];
+	uint8_t m_pstat[4];
+	uint8_t m_r1stat;
+	int m_ph1pos;
+	int m_ph3pos;
+	int m_hp3pos;
+
+	void update_interrupts();
+
+	devcb_write_line m_hirq_handler;
+	devcb_write_line m_pnmi_handler;
+	devcb_write_line m_pirq_handler;
+	devcb_write_line m_drq_handler;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(TUBE, tube_device)
+
+#endif // MAME_MACHINE_TUBE_H