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// license:BSD-3-Clause
// copyright-holders:AJR
/**********************************************************************
SWTPC MP-S Serial Interface
**********************************************************************/
#include "emu.h"
#include "mps.h"
#include "bus/rs232/rs232.h"
#include "machine/6850acia.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> ss50_mps_device
class ss50_mps_device : public device_t, public ss50_card_interface
{
public:
// construction/destruction
ss50_mps_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, SS50_MPS, tag, owner, clock)
, ss50_card_interface(mconfig, *this)
, m_acia(*this, "acia")
, m_irq_jumper(*this, "IRQ")
, m_rate_jumper(*this, "BAUD")
, m_cts_route(*this, "CTS_ROUTE")
{
}
DECLARE_INPUT_CHANGED_MEMBER(cts_route_change);
protected:
// device-specific overrides
virtual ioport_constructor device_input_ports() const override ATTR_COLD;
virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
virtual void device_start() override ATTR_COLD;
// interface-specific overrides
virtual u8 register_read(offs_t offset) override;
virtual void register_write(offs_t offset, u8 data) override;
virtual void f110_w(int state) override;
virtual void f150_9600_w(int state) override;
virtual void f300_w(int state) override;
virtual void f600_4800_w(int state) override;
virtual void f600_1200_w(int state) override;
private:
void acia_irq_w(int state);
void route_cts(int state);
required_device<acia6850_device> m_acia;
required_ioport m_irq_jumper;
required_ioport m_rate_jumper;
required_ioport m_cts_route;
int m_cts;
};
static INPUT_PORTS_START( mps )
PORT_START("IRQ")
PORT_CONFNAME(1, 0, "IRQ")
PORT_CONFSETTING(1, DEF_STR(Off))
PORT_CONFSETTING(0, DEF_STR(On))
PORT_START("BAUD")
PORT_CONFNAME(0x1f, 0x1d, "Baud Rate")
PORT_CONFSETTING(0x1e, "110")
PORT_CONFSETTING(0x1d, "150 / 9600")
PORT_CONFSETTING(0x1b, "300")
PORT_CONFSETTING(0x17, "600")
PORT_CONFSETTING(0x0f, "1200")
PORT_START("CTS_ROUTE")
PORT_CONFNAME(1, 0, "CTS route") PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(ss50_mps_device::cts_route_change), 0)
PORT_CONFSETTING(0, "Wired low (standard)")
PORT_CONFSETTING(1, "Connected through (modified)")
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor ss50_mps_device::device_input_ports() const
{
return INPUT_PORTS_NAME(mps);
}
static DEVICE_INPUT_DEFAULTS_START( terminal )
DEVICE_INPUT_DEFAULTS("RS232_RXBAUD", 0xff, RS232_BAUD_9600)
DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_9600)
DEVICE_INPUT_DEFAULTS("RS232_DATABITS", 0xff, RS232_DATABITS_8)
DEVICE_INPUT_DEFAULTS("RS232_PARITY", 0xff, RS232_PARITY_NONE)
DEVICE_INPUT_DEFAULTS("RS232_STOPBITS", 0xff, RS232_STOPBITS_1)
DEVICE_INPUT_DEFAULTS_END
//-------------------------------------------------
// device_add_mconfig - add device-specific
// machine configuration
//-------------------------------------------------
void ss50_mps_device::device_add_mconfig(machine_config &config)
{
ACIA6850(config, m_acia, 0);
m_acia->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
//m_acia->rts_handler().set(FUNC(ss50_mps_device::reader_control_w));
m_acia->irq_handler().set(FUNC(ss50_mps_device::acia_irq_w));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal"));
rs232.rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
rs232.cts_handler().set(FUNC(ss50_mps_device::route_cts));
rs232.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal));
}
void ss50_mps_device::device_start()
{
save_item(NAME(m_cts));
}
//-------------------------------------------------
// register_read - read from a port register
//-------------------------------------------------
u8 ss50_mps_device::register_read(offs_t offset)
{
return m_acia->read(offset & 1);
}
//-------------------------------------------------
// register_write - write to a port register
//-------------------------------------------------
void ss50_mps_device::register_write(offs_t offset, u8 data)
{
m_acia->write(offset & 1, data);
}
void ss50_mps_device::f110_w(int state)
{
if (!BIT(m_rate_jumper->read(), 0))
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
}
void ss50_mps_device::f150_9600_w(int state)
{
if (!BIT(m_rate_jumper->read(), 1))
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
}
void ss50_mps_device::f300_w(int state)
{
if (!BIT(m_rate_jumper->read(), 2))
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
}
void ss50_mps_device::f600_4800_w(int state)
{
if (!BIT(m_rate_jumper->read(), 3))
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
}
void ss50_mps_device::f600_1200_w(int state)
{
if (!BIT(m_rate_jumper->read(), 4))
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
}
void ss50_mps_device::acia_irq_w(int state)
{
if (!m_irq_jumper->read())
write_irq(state);
}
void ss50_mps_device::route_cts(int state)
{
if (m_cts_route->read())
m_acia->write_cts(state);
// Cache the state, in case the ioport setting changes.
m_cts = state;
}
INPUT_CHANGED_MEMBER(ss50_mps_device::cts_route_change)
{
if (newval)
m_acia->write_cts(m_cts);
else
m_acia->write_cts(0);
}
// device type definition
DEFINE_DEVICE_TYPE_PRIVATE(SS50_MPS, ss50_card_interface, ss50_mps_device, "ss50_mps", "MP-S Serial Interface")
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