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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/*********************************************************************
ym2148.h
Yamaha YM2148 Midi and keyboard interface
*********************************************************************/
#ifndef MAME_MACHINE_YM2148_H
#define MAME_MACHINE_YM2148_H
#pragma once
#include "diserial.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
class ym2148_device : public device_t, public device_serial_interface
{
public:
// construction/destruction
ym2148_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
// configuration helpers
auto txd_handler() { return m_txd_handler.bind(); }
auto port_write_handler() { return m_port_write_handler.bind(); }
auto port_read_handler() { return m_port_read_handler.bind(); }
auto irq_handler() { return m_irq_handler.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
DECLARE_WRITE_LINE_MEMBER(write_rxd);
uint8_t get_irq_vector();
protected:
virtual void device_start() override;
virtual void device_reset() override;
TIMER_CALLBACK_MEMBER(serial_clock_tick);
private:
devcb_write_line m_txd_handler;
devcb_write_line m_irq_handler;
devcb_write8 m_port_write_handler; // write ST0-ST7
devcb_read8 m_port_read_handler; // read SD0-SD7
int m_irq_state;
uint8_t m_irq_vector;
uint8_t m_external_irq_vector;
// Does this chip have 1 or 2 data registers?
uint8_t m_data_out;
uint8_t m_data_in;
uint8_t m_control;
uint8_t m_status;
emu_timer *m_timer;
int m_rxd;
bool m_tx_busy;
void receive_clock();
void transmit_clock();
void update_irq();
enum
{
STATUS_TRANSMIT_READY = 0x01,
STATUS_RECEIVE_BUFFER_FULL = 0x02,
STATUS_OVERRUN_ERROR = 0x10,
STATUS_FRAMING_ERROR = 0x20,
CONTROL_TRANSMIT_ENABLE = 0x01,
CONTROL_TRANSMIT_IRQ_ENABLE = 0x02,
CONTROL_RECEIVE_ENABLE = 0x04,
CONTROL_RECEIVE_IRQ_ENABLE = 0x08
};
};
DECLARE_DEVICE_TYPE(YM2148, ym2148_device)
#endif // MAME_MACHINE_YM2148_H
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