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diff --git a/src/mame/machine/v1050kb.h b/src/mame/machine/v1050kb.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Visual 1050 keyboard emulation
+
+*********************************************************************/
+
+#pragma once
+
+#ifndef __V1050_KEYBOARD__
+#define __V1050_KEYBOARD__
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+#include "sound/discrete.h"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_V1050_KEYBOARD_OUT_TX_HANDLER(_devcb) \
+ devcb = &v1050_keyboard_device::set_out_tx_handler(*device, DEVCB_##_devcb);
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> V1050_keyboard_device
+
+class v1050_keyboard_device : public device_t
+{
+public:
+ // construction/destruction
+ v1050_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ template<class _Object> static devcb_base &set_out_tx_handler(device_t &device, _Object object) { return downcast<v1050_keyboard_device &>(device).m_out_tx_handler.set_callback(object); }
+
+ // optional information overrides
+ virtual const rom_entry *device_rom_region() const;
+ virtual machine_config_constructor device_mconfig_additions() const;
+ virtual ioport_constructor device_input_ports() const;
+
+ DECLARE_WRITE_LINE_MEMBER( si_w );
+
+ // not really public
+ DECLARE_READ8_MEMBER( kb_p1_r );
+ DECLARE_WRITE8_MEMBER( kb_p1_w );
+ DECLARE_WRITE8_MEMBER( kb_p2_w );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+private:
+ required_device<cpu_device> m_maincpu;
+ required_device<discrete_sound_device> m_discrete;
+ required_ioport m_y0;
+ required_ioport m_y1;
+ required_ioport m_y2;
+ required_ioport m_y3;
+ required_ioport m_y4;
+ required_ioport m_y5;
+ required_ioport m_y6;
+ required_ioport m_y7;
+ required_ioport m_y8;
+ required_ioport m_y9;
+ required_ioport m_ya;
+ required_ioport m_yb;
+ devcb_write_line m_out_tx_handler;
+
+ UINT8 m_y;
+};
+
+
+// device type definition
+extern const device_type V1050_KEYBOARD;
+
+
+
+#endif