// license:BSD-3-Clause // copyright-holders:smf /********************************************************************** Classical Games/Protovision 4 Player Interface emulation http://www.protovision-online.com/hardw/4_player.htm http://hitmen.c02.at/html/hardware.html **********************************************************************/ #include "4cga.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_4CGA = &device_creator; static INPUT_PORTS_START( c64_4player ) PORT_START("JOY3") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_0) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_1) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_2) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy3_3) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, device_pet_user_port_interface, output_h) PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("JOY4") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_0) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_1) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_2) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, c64_4cga_device, write_joy4_3) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, device_pet_user_port_interface, output_j) PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c64_4cga_device::device_input_ports() const { return INPUT_PORTS_NAME( c64_4player ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_4cga_device - constructor //------------------------------------------------- c64_4cga_device::c64_4cga_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_4CGA, "C64 Protovision 4 Player Interface", tag, owner, clock, "c64_4cga", __FILE__), device_pet_user_port_interface(mconfig, *this), m_port(0), m_joy3(0xf), m_joy4(0xf) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_4cga_device::device_start() { // state saving save_item(NAME(m_port)); } //------------------------------------------------- // update_output //------------------------------------------------- void c64_4cga_device::update_output() { UINT8 data; if (m_port) { data = m_joy3; } else { data = m_joy4; } output_c((data>>0)&1); output_d((data>>1)&1); output_e((data>>2)&1); output_f((data>>3)&1); } //------------------------------------------------- // c64_pb_w - port B write //------------------------------------------------- WRITE_LINE_MEMBER( c64_4cga_device::input_l ) { m_port = state; update_output(); }