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// license:BSD-3-Clause
// copyright-holders:Vas Crabb
#include "emu.h"
#include "patchbox.h"
#include <algorithm>
#include <iterator>
namespace {
enum : ioport_value
{
// DB25 DE9 V.24 circuit
TXD, // 2 3 103
RXD, // 3 2 104
RTS, // 4 7 105
CTS, // 5 8 106
DSR, // 6 6 107
DTR, // 20 4 108/2
DCD, // 8 1 109
SPDS, // 23 111
SI, // 112
ETC, // 24 113
TXC, // 15 114
RXC, // 17 115
RI, // 22 9 125
ASSERT,
DEASSERT,
SIGNAL_COUNT
};
class rs232_patch_box_device: public device_t, public device_rs232_port_interface
{
public:
rs232_patch_box_device(
machine_config const &mconfig,
char const *tag,
device_t *owner,
uint32_t clock)
: device_t(mconfig, RS232_PATCH_BOX, tag, owner, clock)
, device_rs232_port_interface(mconfig, *this)
, m_dce_port(*this, "dce")
, m_conf(*this, "CONF%u", 0)
{
}
DECLARE_INPUT_CHANGED_MEMBER(source_changed)
{
unsigned const newsource = m_conf[param]->read() & 0x0f;
u8 const newsig = m_signals[newsource];
bool const changed = m_signals[m_sources[param]] != newsig;
m_sources[param] = newsource;
if (changed)
{
u8 const newout = newsig ^ m_invert[param];
switch (param)
{
case RXD: output_rxd(newout); break;
case DCD: output_dcd(newout); break;
case DSR: output_dsr(newout); break;
case RI: output_ri(newout); break;
case SI: output_si(newout); break;
case CTS: output_cts(newout); break;
case RXC: output_rxc(newout); break;
case TXC: output_txc(newout); break;
case TXD: m_dce_port->write_txd(newout); break;
case DTR: m_dce_port->write_dtr(newout); break;
case RTS: m_dce_port->write_rts(newout); break;
case ETC: m_dce_port->write_etc(newout); break;
case SPDS: m_dce_port->write_spds(newout); break;
}
}
}
protected:
virtual void device_add_mconfig(machine_config &config) override
{
RS232_PORT(config, m_dce_port, default_rs232_devices, nullptr);
m_dce_port->rxd_handler().set(FUNC(rs232_patch_box_device::signal_in<RXD>));
m_dce_port->dcd_handler().set(FUNC(rs232_patch_box_device::signal_in<DCD>));
m_dce_port->dsr_handler().set(FUNC(rs232_patch_box_device::signal_in<DSR>));
m_dce_port->ri_handler().set(FUNC(rs232_patch_box_device::signal_in<RI>));
m_dce_port->si_handler().set(FUNC(rs232_patch_box_device::signal_in<SI>));
m_dce_port->cts_handler().set(FUNC(rs232_patch_box_device::signal_in<CTS>));
m_dce_port->rxc_handler().set(FUNC(rs232_patch_box_device::signal_in<RXC>));
m_dce_port->txc_handler().set(FUNC(rs232_patch_box_device::signal_in<TXC>));
}
virtual ioport_constructor device_input_ports() const override;
virtual void device_resolve_objects() override
{
std::fill(std::begin(m_sources), std::end(m_sources), DEASSERT);
std::fill(std::begin(m_invert), std::end(m_invert), 0);
std::fill(std::begin(m_signals), std::end(m_signals), 1);
m_signals[ASSERT] = 0;
}
virtual void device_start() override
{
save_item(NAME(m_signals));
}
virtual void device_reset() override
{
for (unsigned i = 0; m_conf.size() > i; ++i)
m_sources[i] = m_conf[i]->read() & 0x0f;
output_rxd(m_signals[m_sources[RXD]] ^ m_invert[RXD]);
output_dcd(m_signals[m_sources[DCD]] ^ m_invert[DCD]);
output_dsr(m_signals[m_sources[DSR]] ^ m_invert[DSR]);
output_ri(m_signals[m_sources[RI]] ^ m_invert[RI]);
output_si(m_signals[m_sources[SI]] ^ m_invert[SI]);
output_cts(m_signals[m_sources[CTS]] ^ m_invert[CTS]);
output_rxc(m_signals[m_sources[RXC]] ^ m_invert[RXC]);
output_txc(m_signals[m_sources[TXC]] ^ m_invert[TXC]);
m_dce_port->write_txd(m_signals[m_sources[TXD]] ^ m_invert[TXD]);
m_dce_port->write_dtr(m_signals[m_sources[DTR]] ^ m_invert[DTR]);
m_dce_port->write_rts(m_signals[m_sources[RTS]] ^ m_invert[RTS]);
m_dce_port->write_etc(m_signals[m_sources[ETC]] ^ m_invert[ETC]);
m_dce_port->write_spds(m_signals[m_sources[SPDS]] ^ m_invert[SPDS]);
}
virtual DECLARE_WRITE_LINE_MEMBER( input_txd ) override { signal_in<TXD>(state); }
virtual DECLARE_WRITE_LINE_MEMBER( input_dtr ) override { signal_in<DTR>(state); }
virtual DECLARE_WRITE_LINE_MEMBER( input_rts ) override { signal_in<RTS>(state); }
virtual DECLARE_WRITE_LINE_MEMBER( input_etc ) override { signal_in<ETC>(state); }
virtual DECLARE_WRITE_LINE_MEMBER( input_spds ) override { signal_in<SPDS>(state); }
private:
template <ioport_value Signal>
DECLARE_WRITE_LINE_MEMBER( signal_in )
{
state = state ? 1 : 0;
if (m_signals[Signal] != state)
{
m_signals[Signal] = state;
if (Signal == m_sources[RXD]) output_rxd(state ^ m_invert[RXD]);
if (Signal == m_sources[DCD]) output_dcd(state ^ m_invert[DCD]);
if (Signal == m_sources[DSR]) output_dsr(state ^ m_invert[DSR]);
if (Signal == m_sources[RI]) output_ri(state ^ m_invert[RI]);
if (Signal == m_sources[SI]) output_si(state ^ m_invert[SI]);
if (Signal == m_sources[CTS]) output_cts(state ^ m_invert[CTS]);
if (Signal == m_sources[RXC]) output_rxc(state ^ m_invert[RXC]);
if (Signal == m_sources[TXC]) output_txc(state ^ m_invert[TXC]);
if (Signal == m_sources[TXD]) m_dce_port->write_txd(state ^ m_invert[TXD]);
if (Signal == m_sources[DTR]) m_dce_port->write_dtr(state ^ m_invert[DTR]);
if (Signal == m_sources[RTS]) m_dce_port->write_rts(state ^ m_invert[RTS]);
if (Signal == m_sources[ETC]) m_dce_port->write_etc(state ^ m_invert[ETC]);
if (Signal == m_sources[SPDS]) m_dce_port->write_spds(state ^ m_invert[SPDS]);
}
}
required_device<rs232_port_device> m_dce_port;
required_ioport_array<13> m_conf;
u8 m_sources[13];
u8 m_invert[SIGNAL_COUNT];
u8 m_signals[SIGNAL_COUNT];
};
#define SOURCE_OPTIONS(prtname, dflt, cnfname) \
PORT_START(prtname) \
PORT_CONFNAME(0x0f, dflt, cnfname) PORT_CHANGED_MEMBER(DEVICE_SELF, rs232_patch_box_device, source_changed, dflt) \
PORT_CONFSETTING(TXD, "TxD") \
PORT_CONFSETTING(RXD, "RxD") \
PORT_CONFSETTING(RTS, "RTS") \
PORT_CONFSETTING(CTS, "CTS") \
PORT_CONFSETTING(DSR, "DSR") \
PORT_CONFSETTING(DTR, "DTR") \
PORT_CONFSETTING(DCD, "DCD") \
PORT_CONFSETTING(SPDS, "SpdS") \
PORT_CONFSETTING(SI, "SI") \
PORT_CONFSETTING(ETC, "ETC") \
PORT_CONFSETTING(TXC, "TxC") \
PORT_CONFSETTING(RXC, "RxC") \
PORT_CONFSETTING(RI, "RI") \
PORT_CONFSETTING(ASSERT, "Asserted") \
PORT_CONFSETTING(DEASSERT, "Deasserted")
INPUT_PORTS_START(patchbox)
SOURCE_OPTIONS("CONF0", TXD, "TxD Source (V.24 103)")
SOURCE_OPTIONS("CONF1", RXD, "RxD Source (V.24 104)")
SOURCE_OPTIONS("CONF2", RTS, "RTS Source (V.24 105)")
SOURCE_OPTIONS("CONF3", CTS, "CTS Source (V.24 106)")
SOURCE_OPTIONS("CONF4", DSR, "DSR Source (V.24 107)")
SOURCE_OPTIONS("CONF5", DTR, "DTR Source (V.24 108/2)")
SOURCE_OPTIONS("CONF6", DCD, "DCD Source (V.24 109)")
SOURCE_OPTIONS("CONF7", SPDS,"SpdS Source (V.24 111)")
SOURCE_OPTIONS("CONF8", SI, "SI Source (V.24 112)")
SOURCE_OPTIONS("CONF9", ETC, "ETC Source (V.24 113)")
SOURCE_OPTIONS("CONF10", TXC, "TxC Source (V.24 114)")
SOURCE_OPTIONS("CONF11", RXC, "RxC Source (V.24 115)")
SOURCE_OPTIONS("CONF12", RI, "RI Source (V.24 125)")
INPUT_PORTS_END
ioport_constructor rs232_patch_box_device::device_input_ports() const
{
return INPUT_PORTS_NAME(patchbox);
}
} // anonymous namespace
DEFINE_DEVICE_TYPE_PRIVATE(RS232_PATCH_BOX, device_rs232_port_interface, rs232_patch_box_device, "rs232_patch_box", "RS-232 Patch Box")
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