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// 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_t::set_txd_handler(*device, DEVCB_##_devcb);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> wangpc_keyboard_t
class wangpc_keyboard_t : public device_t,
public device_serial_interface
{
public:
// construction/destruction
wangpc_keyboard_t(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template<class _Object> static devcb_base &set_txd_handler(device_t &device, _Object object) { return downcast<wangpc_keyboard_t &>(device).m_txd_handler.set_callback(object); }
// optional information overrides
virtual const tiny_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;
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
// device_serial_interface overrides
virtual void tra_callback() override;
virtual void tra_complete() override;
virtual void rcv_callback() override;
virtual void rcv_complete() override;
private:
required_device<i8051_device> m_maincpu;
required_ioport_array<16> m_y;
devcb_write_line m_txd_handler;
uint8_t m_keylatch;
int m_rxd;
};
// device type definition
extern const device_type WANGPC_KEYBOARD;
#endif
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