// license:BSD-3-Clause // copyright-holders:Fabio Priuli /********************************************************************** Nintendo Family Computer & Entertainment System Zapper Lightgun **********************************************************************/ #include "emu.h" #include "zapper.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(NES_ZAPPER, nes_zapper_device, "nes_zapper", "Nintendo Zapper Lightgun") //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- static INPUT_PORTS_START( nes_zapper ) PORT_START("GUN_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("GUN_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, 239) PORT_START("GUN_T") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("Lightgun Trigger") PORT_CHANGED_MEMBER(DEVICE_SELF, nes_zapper_device, trigger, 0) INPUT_PORTS_END ioport_constructor nes_zapper_device::device_input_ports() const { return INPUT_PORTS_NAME( nes_zapper ); } INPUT_CHANGED_MEMBER(nes_zapper_device::trigger) { // a trigger pull is active for around 3-4 frames if (newval) m_trigger->adjust(attotime::from_msec(50)); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void nes_zapper_device::device_add_mconfig(machine_config &config) { NES_ZAPPER_SENSOR(config, m_sensor, 0); if (m_port != nullptr) m_sensor->set_screen_tag(m_port->m_screen); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // constructor //------------------------------------------------- nes_zapper_device::nes_zapper_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, NES_ZAPPER, tag, owner, clock) , device_nes_control_port_interface(mconfig, *this) , m_sensor(*this, "sensor") , m_lightx(*this, "GUN_X") , m_lighty(*this, "GUN_Y") { } //------------------------------------------------- // device_start //------------------------------------------------- void nes_zapper_device::device_start() { m_trigger = timer_alloc(timer_expired_delegate()); } //------------------------------------------------- // read //------------------------------------------------- u8 nes_zapper_device::read_bit34() { u8 ret = m_trigger->enabled() ? 0x10 : 0; if (!m_sensor->detect_light(m_lightx->read(), m_lighty->read())) ret |= 0x08; return ret; } u8 nes_zapper_device::read_exp(offs_t offset) { u8 ret = 0; if (offset == 1) // $4017 ret = nes_zapper_device::read_bit34(); return ret; }