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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/**********************************************************************
Nintendo Entertainment System Four Score Adapter
TODO: current implementation is a HACK, due to limitations of the
slot system!
A real Four Score would be connected to both the controller ports of
the NES, but current core cannot emulate something like this until
devices can live their own life and being connected to other devices
at request.
In current implementation the device has to be mounted separately in
the two ports and each enables 2 inputs (this is more or less as hacky
as the non-slot previous one, where the 4 ports were always available
to the emulated system, but it's not a great consolation :( )
Two subdevices are currently used so to warn the user that the first
one gives P1+P3 inputs and the second one gives P2+P4 inputs.
For the same reason, we don't currently emulate the 2P/4P switch,
since we could at best have two switches to disable the second player
inputs.
Note: Two Pads are hardcoded in inputs below, instead of acting as
passthrough for 2 standard joypad devices, in order to show in the
internal UI that they belong to P1+P3 and P2+P4, otherwise they would
be listed as P1+P2 and P3+P4 respectively. This *HAS* to be changed
once the slot support in the code has improved (4 standard joypads
shall be attached to the unit!)
**********************************************************************/
#include "emu.h"
#include "4score.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(NES_4SCORE_P1P3, nes_4score_p1p3_device, "nes_4score_p1p3", "Nintendo Four Score Adapter P1/P3")
DEFINE_DEVICE_TYPE(NES_4SCORE_P2P4, nes_4score_p2p4_device, "nes_4score_p2p4", "Nintendo Four Score Adapter P2/P4")
static INPUT_PORTS_START( nes_4score_p1p3 )
PORT_START("PAD1")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("A") PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("B") PORT_PLAYER(1)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(1)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(1)
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
PORT_START("PAD3")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("A") PORT_PLAYER(3)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("B") PORT_PLAYER(3)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(3)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(3)
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(3)
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(3)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(3)
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(3)
INPUT_PORTS_END
static INPUT_PORTS_START( nes_4score_p2p4 )
PORT_START("PAD2")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("A") PORT_PLAYER(2)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("B") PORT_PLAYER(2)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(2)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(2)
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
PORT_START("PAD4")
PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_NAME("A") PORT_PLAYER(4)
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 ) PORT_NAME("B") PORT_PLAYER(4)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_SELECT ) PORT_PLAYER(4)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START ) PORT_PLAYER(4)
PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_PLAYER(4)
PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_PLAYER(4)
PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_PLAYER(4)
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(4)
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor nes_4score_p1p3_device::device_input_ports() const
{
return INPUT_PORTS_NAME( nes_4score_p1p3 );
}
ioport_constructor nes_4score_p2p4_device::device_input_ports() const
{
return INPUT_PORTS_NAME( nes_4score_p2p4 );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// nes_4score_device - constructor
//-------------------------------------------------
nes_4score_device::nes_4score_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_latch(0)
{
}
nes_4score_p1p3_device::nes_4score_p1p3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nes_4score_device(mconfig, NES_4SCORE_P1P3, tag, owner, clock)
, m_joypad1(*this, "PAD1")
, m_joypad3(*this, "PAD3")
{
}
nes_4score_p2p4_device::nes_4score_p2p4_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nes_4score_device(mconfig, NES_4SCORE_P2P4, tag, owner, clock)
, m_joypad2(*this, "PAD2")
, m_joypad4(*this, "PAD4")
{
}
//-------------------------------------------------
// device_start
//-------------------------------------------------
void nes_4score_device::device_start()
{
save_item(NAME(m_latch));
}
//-------------------------------------------------
// device_reset
//-------------------------------------------------
void nes_4score_device::device_reset()
{
m_latch = 0;
}
//-------------------------------------------------
// read
//-------------------------------------------------
uint8_t nes_4score_device::read_bit0()
{
uint8_t ret = m_latch & 1;
m_latch >>= 1;
return ret;
}
//-------------------------------------------------
// write
//-------------------------------------------------
void nes_4score_p1p3_device::write(uint8_t data)
{
if (data & 0x01)
return;
// P3 & P4 inputs in NES Four Score are read serially with P1 & P2
m_latch = m_joypad1->read();
m_latch |= (m_joypad3->read() << 8); // pad 3
m_latch |= (0x08 << 16); // signature
}
void nes_4score_p2p4_device::write(uint8_t data)
{
if (data & 0x01)
return;
// P3 & P4 inputs in NES Four Score are read serially with P1 & P2
m_latch = m_joypad2->read();
m_latch |= (m_joypad4->read() << 8); // pad 4
m_latch |= (0x04 << 16); // signature
}
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