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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************
Nintendo Family Computer & Entertainment System -
Arkanoid Paddle input device
**********************************************************************/
#include "emu.h"
#include "arkpaddle.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(NES_ARKPADDLE, nes_vaus_device, "nes_vaus", "NES Arkanoid Vaus Controller")
DEFINE_DEVICE_TYPE(NES_ARKPADDLE_FC, nes_vausfc_device, "nes_vausfc", "FC Arkanoid Vaus Controller")
static INPUT_PORTS_START( arkanoid_paddle )
PORT_START("PADDLE")
PORT_BIT( 0xff, 0x7f, IPT_PADDLE) PORT_SENSITIVITY(25) PORT_KEYDELTA(25) PORT_CENTERDELTA(0) PORT_MINMAX(0x62,0xf2)
PORT_START("BUTTON")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON1) PORT_NAME("Paddle button")
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor nes_vaus_device::device_input_ports() const
{
return INPUT_PORTS_NAME( arkanoid_paddle );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// nes_vaus_device - constructor
//-------------------------------------------------
nes_vaus_device::nes_vaus_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, type, tag, owner, clock)
, device_nes_control_port_interface(mconfig, *this)
, m_paddle(*this, "PADDLE")
, m_button(*this, "BUTTON")
, m_start_conv(0), m_latch(0)
{
}
nes_vaus_device::nes_vaus_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nes_vaus_device(mconfig, NES_ARKPADDLE, tag, owner, clock)
{
}
nes_vausfc_device::nes_vausfc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nes_vaus_device(mconfig, NES_ARKPADDLE_FC, tag, owner, clock)
{
}
//-------------------------------------------------
// device_start
//-------------------------------------------------
void nes_vaus_device::device_start()
{
save_item(NAME(m_latch));
save_item(NAME(m_start_conv));
}
//-------------------------------------------------
// device_reset
//-------------------------------------------------
void nes_vaus_device::device_reset()
{
m_latch = 0;
m_start_conv = 0;
}
//-------------------------------------------------
// read
//-------------------------------------------------
uint8_t nes_vaus_device::read_bit34()
{
uint8_t ret = (m_button->read() << 3);
ret |= (m_latch & 0x80) >> 3;
m_latch <<= 1;
m_latch &= 0xff;
return ret;
}
uint8_t nes_vausfc_device::read_exp(offs_t offset)
{
uint8_t ret;
if (offset == 0) //$4016
ret = m_button->read() << 1;
else //$4017
{
ret = (m_latch & 0x80) >> 6;
m_latch <<= 1;
m_latch &= 0xff;
}
return ret;
}
//-------------------------------------------------
// write
//-------------------------------------------------
void nes_vaus_device::write(uint8_t data)
{
int old = m_start_conv;
if (data == 0 && old == 1)
m_latch = (uint8_t) (m_paddle->read() ^ 0xff);
m_start_conv = data;
}
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