diff options
Diffstat (limited to 'src/devices/bus/sms_ctrl/rs232adapt.cpp')
-rw-r--r-- | src/devices/bus/sms_ctrl/rs232adapt.cpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/devices/bus/sms_ctrl/rs232adapt.cpp b/src/devices/bus/sms_ctrl/rs232adapt.cpp new file mode 100644 index 00000000000..e6fb0b6ecd9 --- /dev/null +++ b/src/devices/bus/sms_ctrl/rs232adapt.cpp @@ -0,0 +1,56 @@ +// license:BSD-3-Clause +// copyright-holders:Vas Crabb +/********************************************************************** + + Mega Drive RS-232 Adapter emulation + +**********************************************************************/ + +#include "emu.h" +#include "rs232adapt.h" + +#include "bus/rs232/rs232.h" + + +namespace { + +class sms_rs232_device : public device_t, public device_sms_control_interface +{ +public: + sms_rs232_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock); + + virtual void out_w(u8 data, u8 mem_mask) override; + +protected: + virtual void device_start() override { } + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + +private: + required_device<rs232_port_device> m_port; +}; + + +sms_rs232_device::sms_rs232_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) : + device_t(mconfig, SMS_RS232, tag, owner, clock), + device_sms_control_interface(mconfig, *this), + m_port(*this, "com") +{ +} + + +void sms_rs232_device::out_w(u8 data, u8 mem_mask) +{ + m_port->write_txd(BIT(data, 4)); +} + + +void sms_rs232_device::device_add_mconfig(machine_config &config) +{ + RS232_PORT(config, m_port, default_rs232_devices, nullptr); +} + +} // anonymous namespace + + + +DEFINE_DEVICE_TYPE_PRIVATE(SMS_RS232, device_sms_control_interface, sms_rs232_device, "sms_rs232", "Mega Drive RS-232 Adapter") |