// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Commodore 64 16KB EPROM cartridge emulation **********************************************************************/ #include "emu.h" #include "16kb.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C64_16KB, c64_16kb_cartridge_device, "c64_16kb", "C64 16KB EPROM cartridge") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- MACHINE_CONFIG_START(c64_16kb_cartridge_device::device_add_mconfig) MCFG_GENERIC_CARTSLOT_ADD("roml", generic_linear_slot, nullptr) MCFG_GENERIC_EXTENSIONS("rom,bin,80") MCFG_GENERIC_CARTSLOT_ADD("romh", generic_linear_slot, nullptr) MCFG_GENERIC_EXTENSIONS("rom,bin,a0,e0") MACHINE_CONFIG_END //------------------------------------------------- // 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_t clock) : device_t(mconfig, C64_16KB, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), m_sw1(*this, "SW1"), m_low(*this, "roml"), m_high(*this, "romh") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_16kb_cartridge_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_16kb_cartridge_device::device_reset() { uint8_t mode = m_sw1->read(); m_exrom = BIT(mode, 0); m_game = BIT(mode, 1); } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- uint8_t c64_16kb_cartridge_device::c64_cd_r(address_space &space, offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { data = m_low->read_rom(space, offset & 0x1fff); } else if (!romh) { data = m_high->read_rom(space, offset & 0x1fff); } return data; }