// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** IDE64 v4.1 cartridge emulation **********************************************************************/ /* TODO: - fast loader does not work with 1541 - IDE unknown command (E8) - FT245 USB - CompactFlash slot - ShortBus (ETH64, DUART, DigiMAX, ETFE) - clock port (ETH64 II, RR-Net, SilverSurfer, MP3@64) */ #include "ide64.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define AT29C010A_TAG "u3" #define DS1302_TAG "u4" #define FT245R_TAG "u21" #define ATA_TAG "ata" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_IDE64 = &device_creator; //------------------------------------------------- // MACHINE_CONFIG_FRAGMENT( c64_ide64 ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( c64_ide64 ) MCFG_ATMEL_29C010_ADD(AT29C010A_TAG) MCFG_DS1302_ADD(DS1302_TAG, XTAL_32_768kHz) MCFG_ATA_INTERFACE_ADD(ATA_TAG, ata_devices, "hdd", nullptr, false) MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor c64_ide64_cartridge_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( c64_ide64 ); } //------------------------------------------------- // INPUT_PORTS( c64_ide64 ) //------------------------------------------------- static INPUT_PORTS_START( c64_ide64 ) PORT_START("JP1") PORT_DIPNAME( 0x01, 0x01, "Flash ROM Write Protect" ) PORT_DIPSETTING( 0x00, "Disabled" ) PORT_DIPSETTING( 0x01, "Enabled" ) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c64_ide64_cartridge_device::device_input_ports() const { return INPUT_PORTS_NAME( c64_ide64 ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_ide64_cartridge_device - constructor //------------------------------------------------- c64_ide64_cartridge_device::c64_ide64_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_IDE64, "C64 IDE64 cartridge", tag, owner, clock, "c64_ide64", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_flash_rom(*this, AT29C010A_TAG), m_rtc(*this, DS1302_TAG), m_ata(*this, ATA_TAG), m_jp1(*this, "JP1"), m_ram(*this, "ram"), m_bank(0), m_ata_data(0), m_wp(0), m_enable(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_ide64_cartridge_device::device_start() { // allocate memory m_ram.allocate(0x8000); // state saving save_item(NAME(m_bank)); save_item(NAME(m_ata_data)); save_item(NAME(m_enable)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_ide64_cartridge_device::device_reset() { m_bank = 0; m_enable = 1; m_wp = m_jp1->read(); m_game = !m_wp; m_exrom = !m_wp; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_ide64_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_enable) return data; int rom_oe = 1, ram_oe = 1; if (!m_game && m_exrom && sphi2 && ba) { if (offset >= 0x1000 && offset < 0x8000) { ram_oe = 0; } else if (offset >= 0x8000 && offset < 0xc000) { rom_oe = 0; } else if (offset >= 0xc000 && offset < 0xd000) { ram_oe = 0; } } if (!roml || !romh) { rom_oe = 0; } if (!io1 && sphi2 && ba) { // 0x20-0x2f IDE // 0x30-0x37 I/O // 0x5d-0x5e FT245 // 0x5f-0x5f DS1302 // 0x60-0xff ROM UINT8 io1_offset = offset & 0xff; if (io1_offset >= 0x20 && io1_offset < 0x28) { m_ata_data = m_ata->read_cs0(space, offset & 0x07, 0xffff); data = m_ata_data & 0xff; } else if (io1_offset >= 0x28 && io1_offset < 0x30) { m_ata_data = m_ata->read_cs1(space, offset & 0x07, 0xffff); data = m_ata_data & 0xff; } else if (io1_offset == 0x31) { data = m_ata_data >> 8; } else if (io1_offset == 0x32) { /* bit description 0 EXROM 1 GAME 2 A14 3 A15 4 A16 5 v4.x 6 7 */ data = 0x20 | (m_bank << 2) | (m_game << 1) | m_exrom; } else if (io1_offset == 0x5f) { m_rtc->sclk_w(0); data &= ~0x01; data |= m_rtc->io_r(); m_rtc->sclk_w(1); } else if (io1_offset >= 0x60) { rom_oe = 0; } } if (!rom_oe) { offs_t addr = (m_bank << 14) | (offset & 0x3fff); data = m_flash_rom->read(addr); } else if (!ram_oe) { data = m_ram[offset & 0x7fff]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_ide64_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 (!m_enable) return; if (!m_game && m_exrom) { if (offset >= 0x1000 && offset < 0x8000) { m_ram[offset & 0x7fff] = data; } else if (offset >= 0xc000 && offset < 0xd000) { m_ram[offset & 0x7fff] = data; } } if ((offset >= 0x8000 && offset < 0xc000) && !m_wp) { offs_t addr = (m_bank << 14) | (offset & 0x3fff); m_flash_rom->write(addr, data); } if (!io1) { // 0x20-0x2f IDE // 0x30-0x37 I/O // 0x5d-0x5e FT245 // 0x5f-0x5f DS1302 // 0x60-0xff ROM UINT8 io1_offset = offset & 0xff; if (io1_offset >= 0x20 && io1_offset < 0x28) { m_ata_data = (m_ata_data & 0xff00) | data; m_ata->write_cs0(space, offset & 0x07, m_ata_data, 0xffff); } else if (io1_offset >= 0x28 && io1_offset < 0x30) { m_ata_data = (m_ata_data & 0xff00) | data; m_ata->write_cs1(space, offset & 0x07, m_ata_data, 0xffff); } else if (io1_offset == 0x31) { m_ata_data = (data << 8) | (m_ata_data & 0xff); } else if (io1_offset == 0x5f) { m_rtc->sclk_w(0); m_rtc->io_w(BIT(data, 0)); m_rtc->sclk_w(1); } else if (io1_offset >= 0x60 && io1_offset < 0x68) { m_bank = offset & 0x07; } else if (io1_offset == 0xfb) { /* bit description 0 disable cartridge 1 RTC CE 2 3 4 5 6 7 */ m_enable = !BIT(data, 0); m_rtc->ce_w(BIT(data, 1)); } else if (io1_offset >= 0xfc) { m_game = BIT(offset, 0); m_exrom = BIT(offset, 1); } } } //------------------------------------------------- // c64_game_r - GAME read //------------------------------------------------- int c64_ide64_cartridge_device::c64_game_r(offs_t offset, int sphi2, int ba, int rw) { return (sphi2 && ba) ? m_game : 1; } //------------------------------------------------- // c64_exrom_r - EXROM read //------------------------------------------------- int c64_ide64_cartridge_device::c64_exrom_r(offs_t offset, int sphi2, int ba, int rw) { return (sphi2 && ba) ? m_exrom : 1; }