// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Tasc Final ChessCard cartridge emulation **********************************************************************/ /* TODO: 629D ldx #$00 629F stx $0e 62A1 sta $df00 62A4 inc $d020 62A7 dec $d020 62AA cpx $0e 62AC beq $62a4 <-- eternal loop here 62AE rts */ #include "emu.h" #include "fcc.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define G65SC02P4_TAG "g65sc02p4" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(C64_FCC, c64_final_chesscard_device, "c64_fcc", "Final ChessCard") //------------------------------------------------- // ROM( c64_fcc ) //------------------------------------------------- ROM_START( c64_fcc ) ROM_REGION( 0x8000, G65SC02P4_TAG, 0 ) ROM_LOAD( "fcc_rom1", 0x0000, 0x8000, CRC(2949836a) SHA1(9e6283095df9e3f4802ed0c654101f8e37168bf6) ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *c64_final_chesscard_device::device_rom_region() const { return ROM_NAME( c64_fcc ); } //------------------------------------------------- // ADDRESS_MAP( c64_fcc_map ) //------------------------------------------------- void c64_final_chesscard_device::c64_fcc_map(address_map &map) { map(0x0000, 0x1fff).mirror(0x6000).rw(FUNC(c64_final_chesscard_device::nvram_r), FUNC(c64_final_chesscard_device::nvram_w)); map(0x8000, 0xffff).rom().region(G65SC02P4_TAG, 0); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void c64_final_chesscard_device::device_add_mconfig(machine_config &config) { M65SC02(config, m_maincpu, XTAL(5'000'000)); m_maincpu->set_addrmap(AS_PROGRAM, &c64_final_chesscard_device::c64_fcc_map); } //------------------------------------------------- // INPUT_PORTS( c64_fcc ) //------------------------------------------------- static INPUT_PORTS_START( c64_fcc ) PORT_START("RESET") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME("Reset") PORT_CODE(KEYCODE_F11) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF_OWNER, c64_expansion_slot_device, reset_w) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor c64_final_chesscard_device::device_input_ports() const { return INPUT_PORTS_NAME( c64_fcc ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_final_chesscard_device - constructor //------------------------------------------------- c64_final_chesscard_device::c64_final_chesscard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, C64_FCC, tag, owner, clock), device_c64_expansion_card_interface(mconfig, *this), device_nvram_interface(mconfig, *this), m_maincpu(*this, G65SC02P4_TAG), m_bank(0), m_ramen(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_final_chesscard_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_final_chesscard_device::device_reset() { m_maincpu->reset(); m_bank = 0; m_ramen = 0; m_game = 0; } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- uint8_t c64_final_chesscard_device::c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { if (m_ramen) { data = m_nvram[offset & 0x1fff]; } else { data = m_roml[(m_bank << 14) | (offset & 0x3fff)]; } } else if (!romh) { data = m_roml[(m_bank << 14) | (offset & 0x3fff)]; } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_final_chesscard_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!roml) { if (m_ramen) { m_nvram[offset & 0x1fff] = data; } } else if (!io1) { /* bit description 0 ? 1 2 3 4 5 6 7 */ printf("IO1 %04x %02x\n", offset, data); m_bank = BIT(data, 0); } else if (!io2) { /* bit description 0 ? 1 2 3 4 5 6 7 ? */ printf("IO2 %04x %02x\n", offset, data); m_ramen = BIT(data, 0); m_game = BIT(data, 7); } } //------------------------------------------------- // nvram_r - NVRAM read //------------------------------------------------- READ8_MEMBER( c64_final_chesscard_device::nvram_r ) { return m_nvram[offset & m_nvram.mask()]; } //------------------------------------------------- // nvram_w - NVRAM write //------------------------------------------------- WRITE8_MEMBER( c64_final_chesscard_device::nvram_w ) { m_nvram[offset & m_nvram.mask()] = data; }