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diff --git a/src/mame/machine/ms7004.h b/src/mame/machine/ms7004.h
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+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+#pragma once
+
+#ifndef __MS7004_H__
+#define __MS7004_H__
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+#include "machine/i8243.h"
+#include "sound/beep.h"
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_MS7004_TX_HANDLER(_cb) \
+ devcb = &ms7004_device::set_tx_handler(*device, DEVCB_##_cb);
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> ms7004_device
+
+class ms7004_device : public device_t //, public device_serial_interface
+{
+public:
+ // construction/destruction
+ ms7004_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ template<class _Object> static devcb_base &set_tx_handler(device_t &device, _Object wr) { return downcast<ms7004_device &>(device).m_tx_handler.set_callback(wr); }
+
+ DECLARE_WRITE8_MEMBER( p1_w );
+ DECLARE_WRITE8_MEMBER( p2_w );
+ DECLARE_READ8_MEMBER( t1_r );
+ DECLARE_WRITE8_MEMBER( i8243_port_w );
+
+protected:
+ // device-level overrides
+ virtual machine_config_constructor device_mconfig_additions() const;
+ virtual const rom_entry *device_rom_region() const;
+ virtual ioport_constructor device_input_ports() const;
+ virtual void device_start();
+ virtual void device_reset();
+
+private:
+ required_device<cpu_device> m_maincpu;
+ required_device<beep_device> m_speaker;
+ required_device<i8243_device> m_i8243;
+
+ required_ioport m_kbd0;
+ required_ioport m_kbd1;
+ required_ioport m_kbd2;
+ required_ioport m_kbd3;
+ required_ioport m_kbd4;
+ required_ioport m_kbd5;
+ required_ioport m_kbd6;
+ required_ioport m_kbd7;
+ required_ioport m_kbd8;
+ required_ioport m_kbd9;
+ required_ioport m_kbd10;
+ required_ioport m_kbd11;
+ required_ioport m_kbd12;
+ required_ioport m_kbd13;
+ required_ioport m_kbd14;
+ required_ioport m_kbd15;
+
+ int m_keylatch; // keyboard row latch
+ UINT8 m_p1;
+ UINT8 m_p2;
+
+ devcb_write_line m_tx_handler;
+};
+
+// device type definition
+extern const device_type MS7004;
+
+#endif