// license:BSD-3-Clause // copyright-holders:smf,Carl #ifndef MAME_BUS_RS232_NULL_MODEM_H #define MAME_BUS_RS232_NULL_MODEM_H #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, uint32_t clock); virtual WRITE_LINE_MEMBER( input_txd ) override { device_serial_interface::rx_w(state); } virtual WRITE_LINE_MEMBER( input_rts ) override { m_rts = 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_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) 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: static constexpr int TIMER_POLL = 1; void queue(); required_device m_stream; required_ioport m_rs232_txbaud; required_ioport m_rs232_rxbaud; required_ioport m_rs232_startbits; 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; }; DECLARE_DEVICE_TYPE(NULL_MODEM, null_modem_device) #endif // MAME_BUS_RS232_NULL_MODEM_H