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Diffstat (limited to 'src/devices/bus/nes_ctrl/4score.cpp')
-rw-r--r-- | src/devices/bus/nes_ctrl/4score.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/devices/bus/nes_ctrl/4score.cpp b/src/devices/bus/nes_ctrl/4score.cpp new file mode 100644 index 00000000000..867af2669b1 --- /dev/null +++ b/src/devices/bus/nes_ctrl/4score.cpp @@ -0,0 +1,189 @@ +// 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 "4score.h" + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type NES_4SCORE_P1P3 = &device_creator<nes_4score_p1p3_device>; +const device_type NES_4SCORE_P2P4 = &device_creator<nes_4score_p2p4_device>; + + +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 *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) + : device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_nes_control_port_interface(mconfig, *this) +{ +} + +nes_4score_p1p3_device::nes_4score_p1p3_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + nes_4score_device(mconfig, NES_4SCORE_P1P3, "Nintendo Four Score Adapter P1/P3", tag, owner, clock, "nes_4score_p1p3", __FILE__), + 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 clock) : + nes_4score_device(mconfig, NES_4SCORE_P2P4, "Nintendo Four Score Adapter P2/P4", tag, owner, clock, "nes_4score_p2p4", __FILE__), + 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 nes_4score_device::read_bit0() +{ + UINT8 ret = m_latch & 1; + m_latch >>= 1; + return ret; +} + +//------------------------------------------------- +// write +//------------------------------------------------- + +void nes_4score_p1p3_device::write(UINT8 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 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 +} |