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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************
Nintendo Family Computer Mahjong Panel
**********************************************************************/
#include "emu.h"
#include "mjpanel.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(NES_MJPANEL, nes_mjpanel_device, "nes_mjpanel", "Famicom Mahjong Panel")
static INPUT_PORTS_START( nes_mjpanel )
PORT_START("MJPANEL.0")
PORT_BIT( 0xff, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_START("MJPANEL.1")
PORT_BIT( 0x03, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_MAHJONG_N )
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_MAHJONG_M )
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_MAHJONG_L )
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_MAHJONG_K )
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_MAHJONG_J )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_MAHJONG_I )
PORT_START("MJPANEL.2")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_MAHJONG_H )
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_MAHJONG_G )
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_MAHJONG_F )
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_MAHJONG_E )
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_MAHJONG_D )
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_MAHJONG_C )
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_MAHJONG_B )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_MAHJONG_A )
PORT_START("MJPANEL.3")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNUSED )
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_MAHJONG_RON )
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_MAHJONG_REACH )
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_MAHJONG_CHI )
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_MAHJONG_PON )
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_MAHJONG_KAN )
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_NAME("Mahjong Select")
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_START ) PORT_NAME("Mahjong Start")
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor nes_mjpanel_device::device_input_ports() const
{
return INPUT_PORTS_NAME( nes_mjpanel );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// nes_mjpanel_device - constructor
//-------------------------------------------------
nes_mjpanel_device::nes_mjpanel_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, NES_MJPANEL, tag, owner, clock)
, device_nes_control_port_interface(mconfig, *this)
, m_panel(*this, "MJPANEL.%u", 0)
, m_latch(0)
{
}
//-------------------------------------------------
// device_start
//-------------------------------------------------
void nes_mjpanel_device::device_start()
{
save_item(NAME(m_latch));
}
//-------------------------------------------------
// device_reset
//-------------------------------------------------
void nes_mjpanel_device::device_reset()
{
m_latch = 0;
}
//-------------------------------------------------
// read
//-------------------------------------------------
uint8_t nes_mjpanel_device::read_exp(offs_t offset)
{
uint8_t ret = 0;
if (offset)
{
ret = (m_latch & 1) << 1;
m_latch >>= 1;
}
else
logerror("Error: Mahjong panel read from $4016\n");
return ret;
}
//-------------------------------------------------
// write
//-------------------------------------------------
void nes_mjpanel_device::write(uint8_t data)
{
if (data & 0x01)
return;
if (data & 0xf8)
logerror("Error: Mahjong panel read with mux data %02x\n", (data & 0xfe));
else
m_latch = m_panel[(data & 0xfe) >> 1]->read();
}
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