// license:BSD-3-Clause // copyright-holders:Vas Crabb /********************************************************************** FM Towns 6-button Pad emulation **********************************************************************/ #include "emu.h" #include "towns6b.h" namespace { INPUT_PORTS_START(fm_towns_6b) PORT_START("PAD") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_8WAY PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_8WAY PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_8WAY PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_8WAY PORT_BIT(0x30, IP_ACTIVE_LOW, IPT_UNUSED) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_START) PORT_NAME("%p Run") PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_SELECT) PORT_START("BUTTONS") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON6) PORT_NAME("%p Z") PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_BUTTON5) PORT_NAME("%p Y") PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_BUTTON4) PORT_NAME("%p X") PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_BUTTON3) PORT_NAME("%p C") PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("%p A") PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("%p B") PORT_BIT(0xc0, IP_ACTIVE_LOW, IPT_UNUSED) INPUT_PORTS_END class fm_towns_6b_device : public device_t, public device_msx_general_purpose_port_interface { public: fm_towns_6b_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); virtual u8 read() override; virtual void pin_8_w(int state) override { m_pin8 = state; } protected: virtual void device_start() override ATTR_COLD; virtual ioport_constructor device_input_ports() const override { return INPUT_PORTS_NAME(fm_towns_6b); } private: required_ioport m_pad; required_ioport m_buttons; u8 m_pin8; }; fm_towns_6b_device::fm_towns_6b_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_TOWNS6B, tag, owner, clock) , device_msx_general_purpose_port_interface(mconfig, *this) , m_pad(*this, "PAD") , m_buttons(*this, "BUTTONS") , m_pin8(0) { } u8 fm_towns_6b_device::read() { const u8 buttons = m_buttons->read(); if (m_pin8) { return buttons; } else { u8 pad = m_pad->read(); if (!BIT(pad, 6)) // RUN activates RIGHT+LEFT pad &= 0xf3; if (!BIT(pad, 7)) // SELECT activates BACK+FWD pad &= 0xfc; return (buttons & 0xf0) | (pad & 0x0f); } } void fm_towns_6b_device::device_start() { save_item(NAME(m_pin8)); } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(MSX_TOWNS6B, device_msx_general_purpose_port_interface, fm_towns_6b_device, "msx_towns6b", "FM Towns 6-button Pad")