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diff --git a/src/devices/bus/pce_ctrl/joypad2.cpp b/src/devices/bus/pce_ctrl/joypad2.cpp
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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 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;
+}