/********************************************************************** Commodore 1700/1750/1764 RAM Expansion Unit emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "c64_reu.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define MOS8726R1_TAG "u1" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_REU1700 = &device_creator; const device_type C64_REU1750 = &device_creator; const device_type C64_REU1764 = &device_creator; //------------------------------------------------- // ROM( c64_reu ) //------------------------------------------------- ROM_START( c64_reu ) ROM_REGION( 0x8000, "roml", 0 ) ROM_CART_LOAD( "rom", 0x0000, 0x8000, ROM_MIRROR ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *c64_reu_cartridge_device::device_rom_region() const { return ROM_NAME( c64_reu ); } //------------------------------------------------- // MACHINE_CONFIG_FRAGMENT( c64_reu ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( c64_reu ) MCFG_MOS8726_ADD(MOS8726R1_TAG) MCFG_CARTSLOT_ADD("rom") MCFG_CARTSLOT_EXTENSION_LIST("rom,bin") MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor c64_reu_cartridge_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( c64_reu ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_reu_cartridge_device - constructor //------------------------------------------------- c64_reu_cartridge_device::c64_reu_cartridge_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant, int jp1, size_t ram_size) : device_t(mconfig, type, name, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), m_dmac(*this, MOS8726R1_TAG), m_variant(variant), m_jp1(jp1), m_ram_size(ram_size) { } c64_reu1700_cartridge_device::c64_reu1700_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : c64_reu_cartridge_device(mconfig, C64_REU1700, "1700 REU", tag, owner, clock, TYPE_1700, 0, 128 * 1024) { } c64_reu1750_cartridge_device::c64_reu1750_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : c64_reu_cartridge_device(mconfig, C64_REU1750, "1750 REU", tag, owner, clock, TYPE_1750, 1, 256 * 1024) { } c64_reu1764_cartridge_device::c64_reu1764_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : c64_reu_cartridge_device(mconfig, C64_REU1764, "1764 REU", tag, owner, clock, TYPE_1764, 1, 512 * 1024) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_reu_cartridge_device::device_start() { // find memory region m_roml = memregion("roml")->base(); // allocate memory c64_ram_pointer(machine(), m_ram_size); // setup DMA controller m_dmac->set_unscaled_clock(m_slot->phi2()); m_dmac->bs_w(m_jp1); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_reu_cartridge_device::device_reset() { m_dmac->reset(); } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_reu_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 (!m_dmac->romsel_r(roml, romh)) { data = m_roml[offset & 0x7fff]; } else if (!io2) { data = m_dmac->read(space, offset); } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_reu_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) { m_dmac->write(space, offset, data); } }