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// 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 separated 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("%p Button I")
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("%p Button II")
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_SELECT ) PORT_NAME("%p Select")
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START ) PORT_NAME("%p 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, const XTAL &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, const XTAL &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, const XTAL &clock) :
pce_joypad2_device(mconfig, PCE_JOYPAD2_TURBO, tag, owner, clock),
m_buttons_io(*this, "BUTTONS"),
m_turbo_io(*this, "TURBO"),
m_counter(0),
m_prev_clr(false)
{
}
//-------------------------------------------------
// 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)) // QC pin from 74xx163
ret |= (1 << i);
}
}
}
return ret;
}
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