// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** CBS Electronics Booster-Grip Joystick Adaptor This peripheral device, which adds two extra buttons to an ordinary single-button joystick, was packaged with the Atari 2600 version of Omega Race. CBS Electronics also advertised it as a pack-in for their unreleased 2600 title Wings (it does not work with the known prototype). The homebrew Thrust games optionally support the Booster-Grip as well. **********************************************************************/ #include "emu.h" #include "joybooster.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(VCS_JOYSTICK_BOOSTER, vcs_joystick_booster_device, "vcs_joystick_booster", "CBS Electronics Booster-Grip Joystick Adaptor") static INPUT_PORTS_START( vcs_joystick_booster ) PORT_START("JOY") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY // Pin 1 PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY // Pin 2 PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY // Pin 3 PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY // Pin 4 PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_WRITE_LINE_MEMBER(FUNC(vcs_joystick_booster_device::trigger_w)) // Pin 6 PORT_BIT( 0xd0, IP_ACTIVE_LOW, IPT_UNUSED ) // Pin 5 PORT_START("POTX") PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_BUTTON2 ) // Pin 9 PORT_START("POTY") PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_BUTTON3 ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor vcs_joystick_booster_device::device_input_ports() const { return INPUT_PORTS_NAME( vcs_joystick_booster ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // vcs_joystick_booster_device - constructor //------------------------------------------------- vcs_joystick_booster_device::vcs_joystick_booster_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, VCS_JOYSTICK_BOOSTER, tag, owner, clock), device_vcs_control_port_interface(mconfig, *this), m_joy(*this, "JOY"), m_potx(*this, "POTX"), m_poty(*this, "POTY") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void vcs_joystick_booster_device::device_start() { } //------------------------------------------------- // vcs_joy_r - joystick read //------------------------------------------------- uint8_t vcs_joystick_booster_device::vcs_joy_r() { return m_joy->read(); } uint8_t vcs_joystick_booster_device::vcs_pot_x_r() { return m_potx->read(); } uint8_t vcs_joystick_booster_device::vcs_pot_y_r() { return m_poty->read(); }