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/**********************************************************************
Nintendo Family Computer & Entertainment System Zapper Lightgun
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#include "zapper.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type NES_ZAPPER = &device_creator<nes_zapper_device>;
static INPUT_PORTS_START( nes_zapper )
PORT_START("ZAPPER_X")
PORT_BIT( 0xff, 0x80, IPT_LIGHTGUN_X) PORT_CROSSHAIR(X, 1.0, 0.0, 0) PORT_SENSITIVITY(70) PORT_KEYDELTA(30) PORT_MINMAX(0,255)
PORT_START("ZAPPER_Y")
PORT_BIT( 0xff, 0x80, IPT_LIGHTGUN_Y) PORT_CROSSHAIR(Y, 1.0, 0.0, 0) PORT_SENSITIVITY(50) PORT_KEYDELTA(30) PORT_MINMAX(0,255)
PORT_START("ZAPPER_T")
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Lightgun Trigger")
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor nes_zapper_device::device_input_ports() const
{
return INPUT_PORTS_NAME( nes_zapper );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// nes_zapper_device - constructor
//-------------------------------------------------
nes_zapper_device::nes_zapper_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
device_t(mconfig, NES_ZAPPER, "Nintendo Zapper Lightgun", tag, owner, clock, "nes_zapper", __FILE__),
device_nes_control_port_interface(mconfig, *this),
m_lightx(*this, "ZAPPER_X"),
m_lighty(*this, "ZAPPER_Y"),
m_trigger(*this, "ZAPPER_T")
{
}
//-------------------------------------------------
// device_start
//-------------------------------------------------
void nes_zapper_device::device_start()
{
}
//-------------------------------------------------
// device_reset
//-------------------------------------------------
void nes_zapper_device::device_reset()
{
}
//-------------------------------------------------
// read
//-------------------------------------------------
UINT8 nes_zapper_device::read_bit34()
{
UINT8 ret = m_trigger->read();
if (!m_port->m_brightpixel_cb.isnull() &&
m_port->m_brightpixel_cb(m_lightx->read(), m_lighty->read()))
ret &= ~0x08; // sprite hit
else
ret |= 0x08; // no sprite hit
return ret;
}
UINT8 nes_zapper_device::read_exp(offs_t offset)
{
UINT8 ret = 0;
if (offset == 1) // $4017
ret |= nes_zapper_device::read_bit34();
return ret;
}
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