// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    Wang PC keyboard emulation

*********************************************************************/

#pragma once

#ifndef __WANGPC_KEYBOARD__
#define __WANGPC_KEYBOARD__


#include "emu.h"
#include "cpu/mcs51/mcs51.h"
#include "sound/sn76496.h"



//**************************************************************************
//  MACROS / CONSTANTS
//**************************************************************************

#define WANGPC_KEYBOARD_TAG "wangpckb"



//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_WANGPC_KEYBOARD_ADD() \
	MCFG_DEVICE_ADD(WANGPC_KEYBOARD_TAG, WANGPC_KEYBOARD, 0)

#define MCFG_WANGPCKB_TXD_HANDLER(_devcb) \
	devcb = &wangpc_keyboard_device::set_txd_handler(*device, DEVCB_##_devcb);


//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> wangpc_keyboard_device

class wangpc_keyboard_device :  public device_t,
								public device_serial_interface
{
public:
	// construction/destruction
	wangpc_keyboard_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<wangpc_keyboard_device &>(device).m_txd_handler.set_callback(object); }

	// optional information overrides
	virtual const rom_entry *device_rom_region() const override;
	virtual machine_config_constructor device_mconfig_additions() const override;
	virtual ioport_constructor device_input_ports() const override;

	DECLARE_WRITE_LINE_MEMBER( write_rxd );

	// not really public
	DECLARE_READ8_MEMBER( kb_p1_r );
	DECLARE_WRITE8_MEMBER( kb_p1_w );
	DECLARE_WRITE8_MEMBER( kb_p2_w );
	DECLARE_WRITE8_MEMBER( kb_p3_w );

	DECLARE_READ8_MEMBER(mcs51_rx_callback);
	DECLARE_WRITE8_MEMBER(mcs51_tx_callback);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	// device_serial_interface overrides

private:
	required_device<i8051_device> m_maincpu;
	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;
	required_ioport m_yc;
	required_ioport m_yd;
	required_ioport m_ye;
	required_ioport m_yf;
	devcb_write_line m_txd_handler;

	UINT8 m_y;
};


// device type definition
extern const device_type WANGPC_KEYBOARD;



#endif
