// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** First Byte Switched Joystick Interface http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/FirstByte_JoystickIF.html **********************************************************************/ #include "emu.h" #include "fbjoy.h" #include "bus/vcs_ctrl/ctrl.h" namespace { class electron_fbjoy_device : public device_t , public device_electron_expansion_interface { public: electron_fbjoy_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, ELECTRON_FBJOY, tag, owner, clock) , device_electron_expansion_interface(mconfig, *this) , m_joy(*this, "joy") { } virtual uint8_t expbus_r(offs_t offset) override; protected: // device_t overrides virtual void device_start() override ATTR_COLD { } // optional information overrides virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; private: required_device m_joy; }; //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void electron_fbjoy_device::device_add_mconfig(machine_config &config) { VCS_CONTROL_PORT(config, m_joy, vcs_control_port_devices, "joy"); } //------------------------------------------------- // expbus_r - expansion data read //------------------------------------------------- uint8_t electron_fbjoy_device::expbus_r(offs_t offset) { uint8_t data = 0xff; if (offset == 0xfcc0) { data = bitswap<8>(m_joy->read_joy(), 7, 6, 4, 5, 3, 2, 1, 0); } return data; } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(ELECTRON_FBJOY, device_electron_expansion_interface, electron_fbjoy_device, "electron_fbjoy", "First Byte Joystick Interface")