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// license:GPL-2.0+
// copyright-holders:Dirk Best
/***************************************************************************
Dick Smith VZ-200/300 RS-232 Cartridge
***************************************************************************/
#include "rs232.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type RS232_INTERFACE = &device_creator<rs232_interface_device>;
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
ROM_START( rs232 )
ROM_REGION(0x800, "software", 0)
ROM_LOAD("rs232_v15.ic2", 0x000, 0x800, CRC(6545260d) SHA1(4042f6f1e09e383f3c92f628c6187dc5f072fdb2))
ROM_END
const rom_entry *rs232_interface_device::device_rom_region() const
{
return ROM_NAME( rs232 );
}
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
static MACHINE_CONFIG_FRAGMENT( rs232 )
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, nullptr)
MCFG_RS232_RXD_HANDLER(WRITELINE(rs232_interface_device, rs232_rx_w))
MACHINE_CONFIG_END
machine_config_constructor rs232_interface_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( rs232 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// wordpro_device - constructor
//-------------------------------------------------
rs232_interface_device::rs232_interface_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, RS232_INTERFACE, "DSE VZ-200/300 RS-232 Interface", tag, owner, clock, "vz_rs232", __FILE__),
device_memexp_interface(mconfig, *this),
m_rs232(*this, "rs232"),
m_rx(1)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void rs232_interface_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void rs232_interface_device::device_reset()
{
// program
m_slot->m_program->install_rom(0x4000, 0x47ff, 0, 0x800, memregion("software")->base());
// data
m_slot->m_program->install_read_handler(0x5000, 0x57ff, read8_delegate(FUNC(rs232_interface_device::receive_data_r), this));
m_slot->m_program->install_write_handler(0x5800, 0x5fff, write8_delegate(FUNC(rs232_interface_device::transmit_data_w), this));
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
WRITE_LINE_MEMBER( rs232_interface_device::rs232_rx_w )
{
m_rx = state;
}
READ8_MEMBER( rs232_interface_device::receive_data_r )
{
return 0x7f | (m_rx << 7);
}
WRITE8_MEMBER( rs232_interface_device::transmit_data_w )
{
m_rs232->write_txd(!BIT(data, 7));
}
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