/********************************************************************** Commodore 64 16KB EPROM cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "c64_16kb.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_16KB = &device_creator; //------------------------------------------------- // ROM( c64_16kb ) //------------------------------------------------- ROM_START( c64_16kb ) ROM_REGION( 0x2000, "roml", 0 ) ROM_CART_LOAD( "roml", 0x0000, 0x2000, ROM_MIRROR ) ROM_REGION( 0x2000, "romh", 0 ) ROM_CART_LOAD( "romh", 0x0000, 0x2000, ROM_MIRROR ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *c64_16kb_cartridge_device::device_rom_region() const { return ROM_NAME( c64_16kb ); } //------------------------------------------------- // MACHINE_CONFIG_FRAGMENT( c64_16kb ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( c64_16kb ) MCFG_CARTSLOT_ADD("roml") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin,80") MCFG_CARTSLOT_ADD("romh") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin,a0,e0") MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor c64_16kb_cartridge_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( c64_16kb ); } //------------------------------------------------- // INPUT_PORTS( c64_16kb ) //------------------------------------------------- static INPUT_PORTS_START( c64_16kb ) PORT_START("SW1") PORT_DIPNAME( 0x03, 0x00, "Mode" ) PORT_DIPSETTING( 0x03, "Off" ) PORT_DIPSETTING( 0x02, "8 KB" ) PORT_DIPSETTING( 0x00, "16 KB" ) PORT_DIPSETTING( 0x01, "Ultimax" ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c64_16kb_cartridge_device::device_input_ports() const { return INPUT_PORTS_NAME( c64_16kb ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_16kb_cartridge_device - constructor //------------------------------------------------- c64_16kb_cartridge_device::c64_16kb_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_16KB, "C64 16KB EPROM cartridge", tag, owner, clock, "c64_16kb", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_sw1(*this, "SW1") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_16kb_cartridge_device::device_start() { m_roml = memregion("roml")->base(); m_romh = memregion("romh")->base(); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_16kb_cartridge_device::device_reset() { UINT8 mode = m_sw1->read(); m_exrom = BIT(mode, 0); m_game = BIT(mode, 1); } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_16kb_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { data = m_roml[offset & 0x1fff]; } else if (!romh) { data = m_romh[offset & 0x1fff]; } return data; }