diff options
Diffstat (limited to 'src/devices/bus/nes_ctrl/zapper.c')
-rw-r--r-- | src/devices/bus/nes_ctrl/zapper.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/devices/bus/nes_ctrl/zapper.c b/src/devices/bus/nes_ctrl/zapper.c new file mode 100644 index 00000000000..422b9664f5e --- /dev/null +++ b/src/devices/bus/nes_ctrl/zapper.c @@ -0,0 +1,96 @@ +// license:BSD-3-Clause +// copyright-holders:Fabio Priuli +/********************************************************************** + + Nintendo Family Computer & Entertainment System Zapper Lightgun + +**********************************************************************/ + +#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; +} |