// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Kempston Joystick Interface **********************************************************************/ #include "emu.h" #include "kempjoy.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(SPECTRUM_KEMPJOY, spectrum_kempjoy_device, "spectrum_kempjoy", "Kempston Joystick Interface") //------------------------------------------------- // INPUT_PORTS( kempjoy ) //------------------------------------------------- static INPUT_PORTS_START( kempjoy ) PORT_START("JOY") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT) PORT_8WAY PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT) PORT_8WAY PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN) PORT_8WAY PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP) PORT_8WAY PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_BUTTON1) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor spectrum_kempjoy_device::device_input_ports() const { return INPUT_PORTS_NAME( kempjoy ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // spectrum_kempjoy_device - constructor //------------------------------------------------- spectrum_kempjoy_device::spectrum_kempjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, SPECTRUM_KEMPJOY, tag, owner, clock) , device_spectrum_expansion_interface(mconfig, *this) , m_joy(*this, "JOY") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void spectrum_kempjoy_device::device_start() { } //************************************************************************** // IMPLEMENTATION //************************************************************************** uint8_t spectrum_kempjoy_device::iorq_r(offs_t offset) { uint8_t data = offset & 1 ? m_slot->fb_r() : 0xff; if ((offset & 0xe0) == 0) // 000- ---- uses 0x1f { data = m_joy->read() & 0x1f; } return data; }