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diff --git a/src/mess/machine/apricotkb_hle.h b/src/mess/machine/apricotkb_hle.h
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+// license:GPL-2.0+
+// copyright-holders:Dirk Best
+/***************************************************************************
+
+ ACT Apricot Keyboard (HLE)
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __APRICOTKB_HLE__
+#define __APRICOTKB_HLE__
+
+#include "emu.h"
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_APRICOT_KEYBOARD_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, APRICOT_KEYBOARD_HLE, 0)
+
+#define MCFG_APRICOT_KEYBOARD_TXD_HANDLER(_write) \
+ devcb = &apricot_keyboard_hle_device::set_txd_handler(*device, DEVCB_##_write);
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> apricot_keyboard_hle_device
+
+class apricot_keyboard_hle_device : public device_t, public device_serial_interface
+{
+public:
+ // construction/destruction
+ apricot_keyboard_hle_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ template<class _Object> static devcb_base &set_txd_handler(device_t &device, _Object object)
+ { return downcast<apricot_keyboard_hle_device &>(device).m_txd_handler.set_callback(object); }
+
+ DECLARE_WRITE_LINE_MEMBER(rxd_w);
+ DECLARE_INPUT_CHANGED_MEMBER(key_callback);
+
+protected:
+ // device_t overrides
+ virtual ioport_constructor device_input_ports() const;
+ virtual void device_start();
+ virtual void device_reset();
+
+ // device_serial_interface overrides
+ virtual void tra_callback();
+ virtual void tra_complete();
+ virtual void rcv_callback();
+ virtual void rcv_complete();
+
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+private:
+ devcb_write_line m_txd_handler;
+
+ int m_rxd;
+
+ UINT8 m_data_in;
+ UINT8 m_data_out;
+};
+
+
+// device type definition
+extern const device_type APRICOT_KEYBOARD_HLE;
+
+
+#endif // __APRICOTKB_HLE__