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// license:BSD-3-Clause
// copyright-holders:smf,Carl
#ifndef MAME_BUS_RS232_NULL_MODEM_H
#define MAME_BUS_RS232_NULL_MODEM_H
#pragma once
#include "rs232.h"
#include "imagedev/bitbngr.h"
#include "diserial.h"
class null_modem_device : public device_t,
public device_serial_interface,
public device_rs232_port_interface
{
public:
null_modem_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
virtual WRITE_LINE_MEMBER( input_txd ) override { device_serial_interface::rx_w(state); }
virtual WRITE_LINE_MEMBER( input_rts ) override { m_rts = state; }
virtual WRITE_LINE_MEMBER( input_dtr ) override { m_dtr = state; }
DECLARE_WRITE_LINE_MEMBER(update_serial);
protected:
virtual ioport_constructor device_input_ports() const override;
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
virtual void tra_callback() override;
virtual void tra_complete() override;
virtual void rcv_complete() override;
private:
TIMER_CALLBACK_MEMBER(update_queue);
required_device<bitbanger_device> m_stream;
required_ioport m_rs232_txbaud;
required_ioport m_rs232_rxbaud;
required_ioport m_rs232_databits;
required_ioport m_rs232_parity;
required_ioport m_rs232_stopbits;
required_ioport m_flow;
uint8_t m_input_buffer[1000];
uint32_t m_input_count;
uint32_t m_input_index;
emu_timer *m_timer_poll;
int m_rts;
int m_dtr;
int m_xoff;
};
DECLARE_DEVICE_TYPE(NULL_MODEM, null_modem_device)
#endif // MAME_BUS_RS232_NULL_MODEM_H
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