// license:BSD-3-Clause // copyright-holders:Nigel Barnes /*************************************************************************** The Serial Port / Vertical Twist Joystick Interface Notes: - Test cases for this joystick are Paradroid 2000 (paradr2k) and Blowpipe (blowpipe). ***************************************************************************/ #include "emu.h" #include "spjoy.h" DEFINE_DEVICE_TYPE(SERIAL_PORT_JOYSTICK, serial_port_joystick_device, "spjoy", "The Serial Port/Vertical Twist Joystick Interface") serial_port_joystick_device::serial_port_joystick_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, SERIAL_PORT_JOYSTICK, tag, owner, clock) , device_centronics_peripheral_interface( mconfig, *this ) , m_joy(*this, "joy_p%u", 1U) , m_data(0xff) , m_busy(0) , m_ack(0) { } void serial_port_joystick_device::device_start() { save_item(NAME(m_data)); save_item(NAME(m_busy)); save_item(NAME(m_ack)); } void serial_port_joystick_device::update_busy_ack() { int busy = 0; int ack = 0; if (~m_data & 0x7f) { if ((~m_data & 0x5f) & (~m_joy[0]->read() & 0x5f)) { busy = 1; } if ((~m_data & 0x5f) & (~m_joy[1]->read() & 0x5f)) { ack = 1; } if (~m_data & 0x20) { busy = ack = 1; } } if (m_busy != busy) { m_busy = busy; output_busy(busy); } if (m_ack != ack) { m_ack = ack; output_ack(!ack); } } static INPUT_PORTS_START( serial_port_joystick ) PORT_START("joy_p1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("joy_p2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) INPUT_PORTS_END ioport_constructor serial_port_joystick_device::device_input_ports() const { return INPUT_PORTS_NAME( serial_port_joystick ); }