// license: BSD-3-Clause // copyright-holders: Dirk Best /*************************************************************************** SNES bootlegs controlled by an MCS-51 core Skeleton driver Currently there are dumps for a Mortal Kombat 3 board and a board with 4 slots that supports various games directly and also has a generic timer based mode. Hardware (for the 4 slot switcher): - MCS-51 based CPU 44-pin (markings removed) - WD1016D-PL (?) - TC5565PL-15 (8k SRAM) - 12 MHz XTAL - 4 Position Dipswitch Connector pinout: JAMMA P1 (from SNES) GND A | 1 GND 1 - GND GND B | 2 GND 2 - +5v C | 3 +5v 3 - +5v D | 4 +5v 4 - -5v E | 5 -5v 5 - +12v F | 6 +12v 6 - H | 7 7 - J | 8 8 - K | 9 9 - SND- L | 10 SND+ 10 - P2 Button R M | 11 P1 Button R 11 - Video GREEN N | 12 Video RED 12 - Video SYNC P | 13 Video BLUE R | 14 Video GND P2 (unknown) P2 Button L S | 15 P2 Button L 1 - T | 16 Coin #1 2 - P2 Start U | 17 P1 Start 3 - P2 Up V | 18 P1 Up P2 Down W | 19 P1 Down P3 (unknown) P2 Left X | 20 P1 Left 1 - +5v P2 Right Y | 21 P1 Right 2 - GND P2 Button X Z | 22 P1 Button X P2 Button Y a | 23 P1 Button Y P4 (unknown) P2 Button A b | 24 P1 Button A 1 - +5v P2 Button B c | 25 P1 Button B 2 - P2 Select d | 26 P1 Select 3 - GND e | 27 GND 4 - GND f | 28 GND 5 - N/C 6 - * Note - P5 ribbon to SNES controls 7 - GND ***************************************************************************/ #include "emu.h" #include "cpu/mcs51/mcs51.h" #include "emupal.h" class snesb51_state : public driver_device { public: snesb51_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_mcu(*this, "mcu") { } void mk3snes(machine_config &config); void snes4sl(machine_config &config); protected: void machine_start() override; private: required_device m_mcu; void mem_map(address_map &map); void io_map(address_map &map); void mcu_p1_w(uint8_t data); uint8_t mcu_p3_r(); void mcu_p3_w(uint8_t data); void ram_address_high_w(uint8_t data); void ram_address_low_w(uint8_t data); void ram_w(uint8_t data); std::unique_ptr m_ram; uint16_t m_ram_address; }; void snesb51_state::mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("mcu", 0); } void snesb51_state::io_map(address_map &map) { // map(0x8000, 0x8000).r // map(0x8200, 0x8200).r // map(0x8401, 0x8401).w map(0x8c00, 0x8c00).w(FUNC(snesb51_state::ram_address_high_w)); map(0x8e00, 0x8e00).w(FUNC(snesb51_state::ram_address_low_w)); // map(0x9000, 0xafff).ram(); map(0xa000, 0xa000).w(FUNC(snesb51_state::ram_w)); // map(0xb000, 0xb000).w // map(0xd000, 0xd000).w // map(0xd400, 0xd400).w // map(0xd800, 0xd800).r } static INPUT_PORTS_START( mk3snes ) INPUT_PORTS_END static INPUT_PORTS_START( snes4sl ) PORT_START("S1") PORT_DIPNAME(0x03, 0x00, "Game Time") PORT_DIPLOCATION("S1:1,2") PORT_DIPSETTING( 0x00, "5 Minutes") PORT_DIPSETTING( 0x01, "15 Minutes") PORT_DIPSETTING( 0x02, "20 Minutes") PORT_DIPSETTING( 0x03, "10 Minutes") PORT_DIPUNKNOWN(0x04, 0x00) PORT_DIPLOCATION("S1:3") PORT_DIPNAME(0x08, 0x00, "Mode") PORT_DIPLOCATION("S1:4") PORT_DIPSETTING( 0x00, "Credit/Timer") PORT_DIPSETTING( 0x08, "Timer") INPUT_PORTS_END const gfx_layout char_layout = { 8,16, 38, 1, { RGN_FRAC(0,1) }, { STEP8(0,1) }, { STEP16(0,8) }, 8*16 }; static GFXDECODE_START(chars) GFXDECODE_ENTRY("mcu", 0x3ec8, char_layout, 0, 1) GFXDECODE_END void snesb51_state::mcu_p1_w(uint8_t data) { logerror("mcu_p1_w: %02x\n", data); } uint8_t snesb51_state::mcu_p3_r() { logerror("mcu_p3_r\n"); return machine().rand(); } void snesb51_state::mcu_p3_w(uint8_t data) { logerror("mcu_p3_w: %02x\n", data); } void snesb51_state::ram_address_high_w(uint8_t data) { data &= 0x1f; m_ram_address = (data << 8) | (m_ram_address & 0x00ff); } void snesb51_state::ram_address_low_w(uint8_t data) { m_ram_address = (m_ram_address & 0xff00) | data; } void snesb51_state::ram_w(uint8_t data) { m_ram[m_ram_address] = data; } void snesb51_state::machine_start() { m_ram = std::make_unique(0x2000); save_pointer(NAME(m_ram), 0x2000); } void snesb51_state::mk3snes(machine_config &config) { I8751(config, m_mcu, 12_MHz_XTAL / 6); m_mcu->set_addrmap(AS_IO, &snesb51_state::io_map); m_mcu->port_out_cb<1>().set(FUNC(snesb51_state::mcu_p1_w)); m_mcu->port_in_cb<3>().set(FUNC(snesb51_state::mcu_p3_r)); m_mcu->port_out_cb<3>().set(FUNC(snesb51_state::mcu_p3_w)); } void snesb51_state::snes4sl(machine_config &config) { // exact type and clock unknown I8031(config, m_mcu, 12_MHz_XTAL / 6); m_mcu->set_addrmap(AS_PROGRAM, &snesb51_state::mem_map); m_mcu->set_addrmap(AS_IO, &snesb51_state::io_map); m_mcu->port_out_cb<1>().set(FUNC(snesb51_state::mcu_p1_w)); m_mcu->port_in_cb<3>().set(FUNC(snesb51_state::mcu_p3_r)); m_mcu->port_out_cb<3>().set(FUNC(snesb51_state::mcu_p3_w)); PALETTE(config, "palette", palette_device::MONOCHROME); GFXDECODE(config, "gfxdecode", "palette", chars); } // this is identical to the snes release apart from a single byte ROM_START( mk3snes ) ROM_REGION(0x400000, "game", 0) ROM_LOAD("5.u5", 0x000000, 0x080000, CRC(c21ee1ac) SHA1(12fc526e39b0b998b39d558fbe5660e72c7fad14)) ROM_LOAD("6.u6", 0x080000, 0x080000, CRC(0e064323) SHA1(a11175516892beb862c7cc1e186034ef1b55ee8f)) ROM_LOAD("7.u7", 0x100000, 0x080000, CRC(7db6b7be) SHA1(a7653c04f5321fd83062425a492c7ed0a4f1fdb0)) ROM_LOAD("8.u8", 0x180000, 0x080000, CRC(28771750) SHA1(d6c469ca2640935b6687f5bf5f6e85275157abb0)) ROM_LOAD("1.u1", 0x200000, 0x080000, CRC(4cab6332) SHA1(3c417ba6d35532b4e2ca9ae4a3b730c589d26aee)) ROM_LOAD("2.u2", 0x280000, 0x080000, CRC(0327999b) SHA1(dc6bb11a925e893453e0e5e5d88b8ace8d6cf859)) ROM_LOAD("3.u3", 0x300000, 0x080000, CRC(229af2de) SHA1(1bbb02aec08afab979ffbe4b68a48dc4cc923f73)) // this rom has 1 byte changed compared to sns-a3me-0.u1 (mk3u in snes softlist) ROM_LOAD("4.u4", 0x380000, 0x080000, CRC(b51930d9) SHA1(220f00d64809a6218015a738e53f11d8dc81578f)) ROM_REGION(0x1000, "mcu", 0) ROM_LOAD("d87c51.u9", 0x0000, 0x1000, CRC(f447620a) SHA1(ac0d78c7b339f13d5f96a6727a0f2147158697f9)) ROM_REGION(0x100, "audiocpu", 0) ROM_LOAD("spc700.rom", 0x00, 0x40, CRC(44bb3a40) SHA1(97e352553e94242ae823547cd853eecda55c20f0)) ROM_END ROM_START( snes4sl ) ROM_REGION(0x8000, "mcu", 0) ROM_LOAD("27c256_11-03.bin", 0x0000, 0x8000, CRC(4e471581) SHA1(0f23ad065d448097f56ab45c3850d53cf85f3670)) ROM_END // YEAR NAME PARENT MACHINE INPUT CLASS INIT ROT COMPANY FULLNAME FLAGS GAME( 199?, mk3snes, 0, mk3snes, mk3snes, snesb51_state, empty_init, ROT0, "bootleg", "Mortal Kombat 3 (SNES bootleg)", MACHINE_IS_SKELETON ) GAME( 1993, snes4sl, 0, snes4sl, snes4sl, snesb51_state, empty_init, ROT0, "bootleg", "SNES 4 Slot arcade switcher", MACHINE_IS_SKELETON )