// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Dela 256KB EPROM cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "dela_ep256.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_DELA_EP256 = &device_creator; //------------------------------------------------- // ROM( c64_dela_ep256 ) //------------------------------------------------- ROM_START( c64_dela_ep256 ) ROM_REGION( 0x40000, "eprom", 0 ) ROM_CART_LOAD( "rom1", 0x00000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom2", 0x08000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom3", 0x10000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom4", 0x18000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom5", 0x20000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom6", 0x28000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom7", 0x30000, 0x08000, ROM_MIRROR ) ROM_CART_LOAD( "rom8", 0x38000, 0x08000, ROM_MIRROR ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *c64_dela_ep256_cartridge_device::device_rom_region() const { return ROM_NAME( c64_dela_ep256 ); } //------------------------------------------------- // MACHINE_CONFIG_FRAGMENT( c64_dela_ep256 ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( c64_dela_ep256 ) MCFG_CARTSLOT_ADD("rom1") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom2") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom3") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom4") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom5") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom6") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom7") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MCFG_CARTSLOT_ADD("rom8") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor c64_dela_ep256_cartridge_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( c64_dela_ep256 ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_dela_ep256_cartridge_device - constructor //------------------------------------------------- c64_dela_ep256_cartridge_device::c64_dela_ep256_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_DELA_EP256, "C64 Dela 256KB EPROM cartridge", tag, owner, clock, "delep256", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_eprom(*this, "eprom") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_dela_ep256_cartridge_device::device_start() { // state saving save_item(NAME(m_bank)); save_item(NAME(m_reset)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_dela_ep256_cartridge_device::device_reset() { m_reset = 1; m_bank = 0; m_exrom = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_dela_ep256_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) { if (m_reset) { data = m_roml[offset & 0x1fff]; } else { offs_t addr = (m_bank << 13) | (offset & 0x1fff); data = m_eprom->base()[addr]; } } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_dela_ep256_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io2 && ((offset & 0xf0) == 0xa0)) { /* bit description 0 socket selection bit 0 1 socket selection bit 1 2 socket selection bit 2 3 4 bank selection bit 0 5 bank selection bit 1 6 7 EXROM */ m_reset = 0; m_bank = ((data & 0x07) << 2) | ((data >> 4) & 0x03); m_exrom = BIT(data, 7); } }