diff --git a/src/mame/sega/megadriv_acbl.cpp b/src/mame/sega/megadriv_acbl.cpp index d92d4b1270609..d6f9a0dd06be8 100644 --- a/src/mame/sega/megadriv_acbl.cpp +++ b/src/mame/sega/megadriv_acbl.cpp @@ -144,6 +144,12 @@ Sunset Riders info - title raster effect is broken (bug in Mega Drive code, happens with normal set too) + + TODO (barek2mb): + - Unknown inputs to Port B of the emulated PIC + - MCU clock frequency + - There is only a 50 MHz XTAL on the PCB, are the other clocks correct? + ****************************************************************************/ #include "emu.h" @@ -161,6 +167,14 @@ void md_boot_state::md_bootleg_map(address_map &map) map(0x200000, 0x2023ff).ram(); // Tested } +void md_boot_mcu_state::md_boot_mcu_map(address_map &map) +{ + md_bootleg_map(map); + + map(0x220000, 0x220001).w(FUNC(md_boot_mcu_state::mcu_w)); + map(0x330000, 0x330001).r(FUNC(md_boot_mcu_state::mcu_r)); +} + void md_boot_6button_state::ssf2mdb_68k_map(address_map &map) { megadriv_68k_map(map); @@ -171,24 +185,6 @@ void md_boot_6button_state::ssf2mdb_68k_map(address_map &map) } -void md_boot_state::megadrvb(machine_config &config) -{ - md_ntsc(config); - - ctrl1_3button(config); - ctrl2_3button(config); - - m_ioports[2]->set_in_handler(NAME([this] () { return m_io_exp.read_safe(0x3f); })); -} - -void md_boot_state::md_bootleg(machine_config &config) -{ - megadrvb(config); - - m_maincpu->set_addrmap(AS_PROGRAM, &md_boot_state::md_bootleg_map); -} - - /************************************* * * Games memory handlers @@ -250,18 +246,6 @@ uint16_t md_boot_state::jparkmb_r() return 0x0000; } -uint16_t md_boot_state::barek2mb_r() -{ - if (m_maincpu->pc() == 0xfa40) - return 0x0400; // TODO: what's this? Needed or the game doesn't boot - - if (m_maincpu->pc() == 0xfa88) - return 0x0ff0; // TODO: fix this, should probably read coin inputs, as is gives 9 credits at start up - - logerror("barek2mb_r : %06x\n", m_maincpu->pc()); - return 0x0000; -} - uint16_t md_boot_state::barek3mba_r() // missing PIC dump, simulated for now { if (m_maincpu->pc() == 0x4dbc6) @@ -315,6 +299,83 @@ uint16_t md_boot_state::dsw_r(offs_t offset) } +/************************************* + * + * PIC MCU Emulation + * + *************************************/ + +uint16_t md_boot_mcu_state::mcu_r() +{ + return (m_mcu_out_latch_msb << 8) | m_mcu_out_latch_lsb; +} + +void md_boot_mcu_state::mcu_w(uint16_t data) +{ + m_mcu_in_latch_lsb = data >> 0; + m_mcu_in_latch_msb = data >> 8; +} + +void md_boot_mcu_state::mcu_porta_w(uint8_t data) +{ + // 3--- select dsw (0) or latches (1) + // -2-- latch enable + // --1- select input (0) or output (1) latches + // ---0 select lsb or msb latches + + if (BIT(data, 2) == 0) + { + if (BIT(data, 1) == 1) + { + if (BIT(data, 0) == 0) + m_mcu_out_latch_lsb = m_mcu_portc; + else + m_mcu_out_latch_msb = m_mcu_portc; + } + } + + m_mcu_porta = data; +} + +void md_boot_mcu_state::mcu_portb_w(uint8_t data) +{ + // 7------- unused + // -6------ cleared on reset + // --5----- toggled on input to b3 + // ---4---- toggled on input to b2 + // ----3--- unknown (input) + // -----2-- unknown (input) + // ------1- unused (input) + // -------0 coin (input) +} + +uint8_t md_boot_mcu_state::mcu_portc_r() +{ + // read dip switches + if (BIT(m_mcu_porta, 3) == 0) + return m_dsw->read(); + + // read from latch + if (BIT(m_mcu_porta, 1) == 0) + { + if (BIT(m_mcu_porta, 0) == 0) + return m_mcu_in_latch_lsb; + else + return m_mcu_in_latch_msb; + } + + // should never go here + logerror("mcu: read from output latch!\n"); + + return 0xff; +} + +void md_boot_mcu_state::mcu_portc_w(uint8_t data) +{ + m_mcu_portc = data; +} + + /************************************* * * Game-specific port definitions @@ -743,8 +804,43 @@ INPUT_PORTS_START( barek2ch ) INPUT_PORTS_END INPUT_PORTS_START( barek2 ) - PORT_INCLUDE( aladmdb ) - // TODO! + PORT_INCLUDE( md_common ) + + PORT_START("dsw") + PORT_DIPNAME(0x0f, 0x0f, DEF_STR( Coinage )) + PORT_DIPSETTING( 0x0f, DEF_STR( 1C_1C )) + PORT_DIPSETTING( 0x0e, DEF_STR( 1C_2C )) + PORT_DIPSETTING( 0x0d, DEF_STR( 1C_3C )) + PORT_DIPSETTING( 0x0c, DEF_STR( 1C_4C )) + PORT_DIPSETTING( 0x0b, DEF_STR( 1C_5C )) + PORT_DIPSETTING( 0x0a, DEF_STR( 1C_6C )) + PORT_DIPSETTING( 0x09, DEF_STR( 2C_1C )) + PORT_DIPSETTING( 0x08, DEF_STR( 3C_1C )) + PORT_DIPSETTING( 0x07, DEF_STR( 4C_1C )) + PORT_DIPSETTING( 0x06, DEF_STR( 5C_1C )) + PORT_DIPSETTING( 0x05, DEF_STR( 6C_1C )) + PORT_DIPSETTING( 0x04, DEF_STR( 2C_3C )) + PORT_DIPSETTING( 0x03, DEF_STR( 3C_2C )) + PORT_DIPSETTING( 0x02, DEF_STR( 5C_3C )) + PORT_DIPSETTING( 0x01, DEF_STR( 8C_3C )) + PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C )) // duplicate + PORT_DIPNAME(0x30, 0x30, DEF_STR( Lives )) + PORT_DIPSETTING( 0x30, "1" ) + PORT_DIPSETTING( 0x20, "2" ) + PORT_DIPSETTING( 0x10, "3" ) + PORT_DIPSETTING( 0x00, "4" ) + PORT_DIPNAME(0xc0, 0xc0, DEF_STR( Difficulty )) + PORT_DIPSETTING( 0xc0, DEF_STR( Easy )) + PORT_DIPSETTING( 0x80, DEF_STR( Medium )) + PORT_DIPSETTING( 0x40, DEF_STR( Hard )) + PORT_DIPSETTING( 0x00, DEF_STR( Hardest )) + + PORT_START("in0") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_COIN1) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN) + PORT_BIT(0xf0, IP_ACTIVE_LOW, IPT_UNUSED) INPUT_PORTS_END INPUT_PORTS_START( barek3 ) @@ -847,6 +943,37 @@ INPUT_PORTS_END * *************************************/ +void md_boot_state::megadrvb(machine_config &config) +{ + md_ntsc(config); + + ctrl1_3button(config); + ctrl2_3button(config); + + m_ioports[2]->set_in_handler(NAME([this] () { return m_io_exp.read_safe(0x3f); })); +} + +void md_boot_state::md_bootleg(machine_config &config) +{ + megadrvb(config); + + m_maincpu->set_addrmap(AS_PROGRAM, &md_boot_state::md_bootleg_map); +} + +void md_boot_mcu_state::md_boot_mcu(machine_config &config) +{ + megadrvb(config); + + m_maincpu->set_addrmap(AS_PROGRAM, &md_boot_mcu_state::md_boot_mcu_map); + + PIC16C57(config, m_mcu, 4000000); // unknown clock + m_mcu->write_a().set(FUNC(md_boot_mcu_state::mcu_porta_w)); + m_mcu->read_b().set_ioport("in0"); + m_mcu->write_b().set(FUNC(md_boot_mcu_state::mcu_portb_w)); + m_mcu->read_c().set(FUNC(md_boot_mcu_state::mcu_portc_r)); + m_mcu->write_c().set(FUNC(md_boot_mcu_state::mcu_portc_w)); +} + void md_boot_6button_state::machine_start() { md_boot_state::machine_start(); @@ -869,7 +996,6 @@ void md_boot_6button_state::ssf2mdb(machine_config &config) } - /************************************* * * Game-specific driver inits @@ -969,15 +1095,6 @@ void md_boot_state::init_srmdb() init_megadriv(); } - -void md_boot_state::init_barek2() -{ - m_maincpu->space(AS_PROGRAM).install_write_handler(0x220000, 0x220001, write16smo_delegate(*this, FUNC(md_boot_state::aladmdb_w))); - m_maincpu->space(AS_PROGRAM).install_read_handler(0x330000, 0x330001, read16smo_delegate(*this, FUNC(md_boot_state::barek2mb_r))); - - init_megadrij(); -} - void md_boot_6button_state::init_barekch() { uint16_t *src = (uint16_t *)memregion("maincpu")->base(); @@ -1181,8 +1298,7 @@ ROM_START( barek2mb ) ROM_LOAD16_BYTE( "m3.bin", 0x100001, 0x080000, CRC(6ec5af5d) SHA1(9088a2d4cff5e7eb439ebaa91ad3bfff11366127) ) ROM_LOAD16_BYTE( "m4.bin", 0x100000, 0x080000, CRC(d8c61e0d) SHA1(3d06e656f6621bb0741211f80c1ecff1669475ee) ) - // Not hooked up yet - ROM_REGION( 0x1000, "pic", ROMREGION_ERASE00 ) + ROM_REGION( 0x1000, "mcu", 0 ) ROM_LOAD( "bk_pic16c57rcp.bin", 0x0000, 0x1000, CRC(434ad1b7) SHA1(9241554793c7375cf58239e762481a4b80a51df6) ) // Unprotected ROM_END @@ -1270,7 +1386,7 @@ GAME( 1994, ssf2mdb, 0, ssf2mdb, ssf2mdb, md_boot_6button_state, GAME( 1993, srmdb, 0, megadrvb, srmdb, md_boot_state, init_srmdb, ROT0, "bootleg / Konami", "Sunset Riders (bootleg of Mega Drive version)", 0 ) GAME( 1993, sonic2mb, 0, md_bootleg, sonic2mb, md_boot_state, init_sonic2mb, ROT0, "bootleg / Sega", "Sonic The Hedgehog 2 (bootleg of Mega Drive version)", 0 ) // Flying wires going through the empty PIC space aren't completely understood GAME( 1993, sonic3mb, 0, md_bootleg, sonic3mb, md_sonic3bl_state, init_sonic3mb, ROT0, "bootleg / Sega", "Sonic The Hedgehog 3 (bootleg of Mega Drive version)", MACHINE_UNEMULATED_PROTECTION | MACHINE_NOT_WORKING ) // undumped PIC -GAME( 1994, barek2mb, 0, md_bootleg, barek2, md_boot_state, init_barek2, ROT0, "bootleg / Sega", "Bare Knuckle II (bootleg of Mega Drive version)", MACHINE_UNEMULATED_PROTECTION | MACHINE_NOT_WORKING ) // Needs PIC hook up +GAME( 1994, barek2mb, 0, md_boot_mcu, barek2, md_boot_mcu_state, init_megadrij, ROT0, "bootleg / Sega", "Bare Knuckle II (bootleg of Mega Drive version)", 0 ) // PCB labeled "BK-059" GAME( 1994, barek3mb, 0, megadrvb, barek3, md_boot_state, init_barek3, ROT0, "bootleg / Sega", "Bare Knuckle III (bootleg of Mega Drive version)", 0 ) GAME( 1994, barek3mba, barek3mb, megadrvb, barek3, md_boot_state, init_barek3a, ROT0, "bootleg / Sega", "Bare Knuckle III (bootleg of Mega Drive version, protected)", MACHINE_UNEMULATED_PROTECTION | MACHINE_NOT_WORKING ) // undumped PIC GAME( 1994, bk3ssrmb, 0, megadrvb_6b, bk3ssrmb, md_boot_6button_state, init_bk3ssrmb, ROT0, "bootleg / Sega", "Bare Knuckle III / Sunset Riders (bootleg of Mega Drive versions)", MACHINE_NOT_WORKING ) // Currently boots as Bare Knuckle III, mechanism to switch game not found yet diff --git a/src/mame/sega/megadriv_acbl.h b/src/mame/sega/megadriv_acbl.h index 23446bb09e0db..ea82274d3e1d0 100644 --- a/src/mame/sega/megadriv_acbl.h +++ b/src/mame/sega/megadriv_acbl.h @@ -4,6 +4,7 @@ #define MAME_SEGA_MEGADRIV_ACBL_H #include "megadriv.h" +#include "cpu/pic16c5x/pic16c5x.h" class md_boot_state : public md_ctrl_state @@ -19,7 +20,6 @@ class md_boot_state : public md_ctrl_state void init_aladmdb(); void init_srmdb(); - void init_barek2(); void init_barek2ch(); void init_barek3(); void init_barek3a(); @@ -35,7 +35,6 @@ class md_boot_state : public md_ctrl_state private: void aladmdb_w(uint16_t data); uint16_t aladmdb_r(); - uint16_t barek2mb_r(); uint16_t barek3mba_r(); uint16_t jparkmb_r(); uint16_t twinktmb_r(); @@ -46,6 +45,40 @@ class md_boot_state : public md_ctrl_state int m_aladmdb_mcu_port = 0; }; +// for games with emulated pic mcu +class md_boot_mcu_state : public md_boot_state +{ +public: + md_boot_mcu_state(const machine_config &mconfig, device_type type, const char *tag) : + md_boot_state(mconfig, type, tag), + m_mcu(*this, "mcu"), + m_dsw(*this, "dsw") + { } + + void md_boot_mcu(machine_config &config); + +private: + void md_boot_mcu_map(address_map &map); + + uint16_t mcu_r(); + void mcu_w(uint16_t data); + + void mcu_porta_w(uint8_t data); + uint8_t mcu_portc_r(); + void mcu_portb_w(uint8_t data); + void mcu_portc_w(uint8_t data); + + required_device m_mcu; + required_ioport m_dsw; + + uint8_t m_mcu_porta; + uint8_t m_mcu_portc; + uint8_t m_mcu_in_latch_msb; + uint8_t m_mcu_in_latch_lsb; + uint8_t m_mcu_out_latch_msb; + uint8_t m_mcu_out_latch_lsb; +}; + class md_sonic3bl_state : public md_boot_state { public: