diff options
Diffstat (limited to 'src/devices/bus/pce_ctrl/joypad2.cpp')
-rw-r--r-- | src/devices/bus/pce_ctrl/joypad2.cpp | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/devices/bus/pce_ctrl/joypad2.cpp b/src/devices/bus/pce_ctrl/joypad2.cpp new file mode 100644 index 00000000000..5ce34fcc903 --- /dev/null +++ b/src/devices/bus/pce_ctrl/joypad2.cpp @@ -0,0 +1,242 @@ +// license:BSD-3-Clause +// copyright-holders:cam900 +/********************************************************************** + + NEC PC Engine/TurboGrafx-16 2 button joypad emulation + + Based on SMS controller port emulation (devices\bus\sms_ctrl\*.*) + by Fabio Priuli, + PC engine emulation (mame\*\pce.*) + by Charles MacDonald, Wilbert Pol, Angelo Salese + + First party models: + + NEC PC Engine Pad (PI-PD001) + No autofire, Bundled in PC Engine + + NEC Turbo Pad (PI-PD002 and Later models) + Add autofire support, Bundled in PC Engine CoreGrafx and later + models + + NEC Turbo Stick (PI-PD4) + Arcade joystick variation of Turbo Pad, with Seperated autofire + buttons. + Turbo Stick for TurboGrafx-16 has slow motion. + + Everything else PI-PD001 supports Autofire. + + TODO: + - Needs verifications for Part numbers + +**********************************************************************/ + +#include "emu.h" +#include "joypad2.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(PCE_JOYPAD2, pce_joypad2_device, "pce_joypad2", "NEC PC Engine Pad") +DEFINE_DEVICE_TYPE(PCE_JOYPAD2_TURBO, pce_joypad2_turbo_device, "pce_joypad2_turbo", "NEC PC Engine/TurboGrafx-16 2 Button Joypad") + + +static INPUT_PORTS_START( pce_joypad2 ) + // II is left of I on the original pad so we map them in reverse order + PORT_START("BUTTONS") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Button I") + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Button II") + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SELECT ) PORT_NAME("Select") + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START ) PORT_NAME("Run") + + PORT_START("DIRECTION") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY +INPUT_PORTS_END + + +static INPUT_PORTS_START( pce_joypad2_turbo ) + PORT_INCLUDE( pce_joypad2 ) + + PORT_START("TURBO") + PORT_CONFNAME( 0x03, 0x00, "Button I Turbo" ) + PORT_CONFSETTING( 0x00, DEF_STR( Off ) ) + PORT_CONFSETTING( 0x02, "Slow" ) + PORT_CONFSETTING( 0x03, "Fast" ) + PORT_CONFNAME( 0x0c, 0x00, "Button II Turbo" ) + PORT_CONFSETTING( 0x00, DEF_STR( Off ) ) + PORT_CONFSETTING( 0x08, "Slow" ) + PORT_CONFSETTING( 0x0c, "Fast" ) +INPUT_PORTS_END + + +//------------------------------------------------- +// input_ports - device-specific input ports +//------------------------------------------------- + +ioport_constructor pce_joypad2_device::device_input_ports() const +{ + return INPUT_PORTS_NAME( pce_joypad2 ); +} + + +ioport_constructor pce_joypad2_turbo_device::device_input_ports() const +{ + return INPUT_PORTS_NAME( pce_joypad2_turbo ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// pce_joypad2_device - constructor +//------------------------------------------------- + +pce_joypad2_device::pce_joypad2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock) : + device_t(mconfig, type, tag, owner, clock), + device_pce_control_port_interface(mconfig, *this), + m_muxer(*this, "mux") +{ +} + +pce_joypad2_device::pce_joypad2_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : + pce_joypad2_device(mconfig, PCE_JOYPAD2, tag, owner, clock) +{ +} + + +//------------------------------------------------- +// pce_joypad2_turbo_device - constructor +//------------------------------------------------- + +pce_joypad2_turbo_device::pce_joypad2_turbo_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : + pce_joypad2_device(mconfig, PCE_JOYPAD2_TURBO, tag, owner, clock), + m_buttons_io(*this, "BUTTONS"), + m_turbo_io(*this, "TURBO") +{ +} + + +//------------------------------------------------- +// device_add_mconfig - device-specific machine +// configuration addiitons +//------------------------------------------------- + +void pce_joypad2_device::device_add_mconfig(machine_config &config) +{ + LS157(config, m_muxer); + m_muxer->a_in_callback().set_ioport("BUTTONS"); + m_muxer->b_in_callback().set_ioport("DIRECTION"); +} + + +void pce_joypad2_turbo_device::device_add_mconfig(machine_config &config) +{ + pce_joypad2_device::device_add_mconfig(config); + m_muxer->a_in_callback().set(FUNC(pce_joypad2_turbo_device::buttons_r)); +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void pce_joypad2_device::device_start() +{ +} + + +void pce_joypad2_turbo_device::device_start() +{ + pce_joypad2_device::device_start(); + save_item(NAME(m_counter)); + save_item(NAME(m_prev_clr)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void pce_joypad2_turbo_device::device_reset() +{ + m_counter = 0; + m_prev_clr = false; +} + + +//------------------------------------------------- +// peripheral_r - joypad read +//------------------------------------------------- + +u8 pce_joypad2_device::peripheral_r() +{ + return m_muxer->output_r(); +} + + +//------------------------------------------------- +// sel_w - MUXer select pin write +//------------------------------------------------- + +void pce_joypad2_device::sel_w(int state) +{ + m_muxer->select_w(state); +} + + +//------------------------------------------------- +// clr_w - MUXer strobe pin write +//------------------------------------------------- + +void pce_joypad2_device::clr_w(int state) +{ + m_muxer->strobe_w(state); +} + + +void pce_joypad2_turbo_device::clr_w(int state) +{ + pce_joypad2_device::clr_w(state); + if ((!m_prev_clr) && state) // rising edge, connected to 74xx163 clock pin + m_counter = (m_counter + 1) & 7; // QA, QD pin not connected + + m_prev_clr = state; +} + + +//------------------------------------------------- +// buttons_r - read button with autofire counter +//------------------------------------------------- + +u8 pce_joypad2_turbo_device::buttons_r() +{ + u8 ret = m_buttons_io->read() & 0xf; + const u8 turbo = m_turbo_io->read() & 0xf; + for (int i = 0; i < 2; i++) + { + const u8 enable_bit = 1 + (i << 1); + const u8 rate_bit = (i << 1); + if (BIT(turbo, enable_bit)) // enable autofire + { + if (BIT(turbo, rate_bit)) // Fast + { + if (BIT(m_counter, 1)) // QB pin from 74xx163 + ret |= (1 << i); + } + else // Slow + { + if (BIT(m_counter, 2)) // OC pin from 74xx163 + ret |= (1 << i); + } + } + } + return ret; +} |