diff options
Diffstat (limited to 'src/devices/bus/nes/mmc1_clones.cpp')
-rw-r--r-- | src/devices/bus/nes/mmc1_clones.cpp | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/src/devices/bus/nes/mmc1_clones.cpp b/src/devices/bus/nes/mmc1_clones.cpp new file mode 100644 index 00000000000..8c318c4b96c --- /dev/null +++ b/src/devices/bus/nes/mmc1_clones.cpp @@ -0,0 +1,432 @@ +// license:BSD-3-Clause +// copyright-holders:kmg +/*********************************************************************************************************** + + + NES/Famicom cartridge emulation for MMC-1 clone PCBs + + + Here we emulate several pirate PCBs based on MMC-1 boards + + ***********************************************************************************************************/ + + +#include "emu.h" +#include "mmc1_clones.h" + + +#ifdef NES_PCB_DEBUG +#define VERBOSE (LOG_GENERAL) +#else +#define VERBOSE (0) +#endif +#include "logmacro.h" + + +//------------------------------------------------- +// constructor +//------------------------------------------------- + +DEFINE_DEVICE_TYPE(NES_BMC_JY012005, nes_bmc_jy012005_device, "nes_bmc_jy012005", "NES Cart BMC JY012005 PCB") +DEFINE_DEVICE_TYPE(NES_BMC_JY820845C, nes_bmc_jy820845c_device, "nes_bmc_jy820845c", "NES Cart BMC JY820845C PCB") +DEFINE_DEVICE_TYPE(NES_FARID_SLROM, nes_farid_slrom_device, "nes_farid_slrom", "NES Cart Farid SLROM 8 in 1 PCB") +DEFINE_DEVICE_TYPE(NES_NINJARYU, nes_ninjaryu_device, "nes_ninjaryu", "NES Cart Ninja Ryukenden Chinese PCB") +DEFINE_DEVICE_TYPE(NES_RESETSXROM, nes_resetsxrom_device, "nes_resetsxrom", "NES Cart BMC RESET-SXROM PCB") +DEFINE_DEVICE_TYPE(NES_SRPG_5IN1, nes_srpg5in1_device, "nes_srpg5in1", "NES Cart Super RPG 5 in 1 PCB") +DEFINE_DEVICE_TYPE(NES_TXC_22110, nes_txc_22110_device, "nes_txc_22110", "NES Cart TXC 01-22110-000 PCB") + + +nes_bmc_jy012005_device::nes_bmc_jy012005_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_BMC_JY012005, tag, owner, clock), m_latch0(0) +{ +} + +nes_bmc_jy820845c_device::nes_bmc_jy820845c_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_BMC_JY820845C, tag, owner, clock), m_latch0(0), m_mode(0) +{ +} + +nes_farid_slrom_device::nes_farid_slrom_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_FARID_SLROM, tag, owner, clock), m_outer(0) +{ +} + +nes_ninjaryu_device::nes_ninjaryu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_NINJARYU, tag, owner, clock) +{ +} + +nes_resetsxrom_device::nes_resetsxrom_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_RESETSXROM, tag, owner, clock), m_reset_count(-1) +{ +} + +nes_srpg5in1_device::nes_srpg5in1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_SRPG_5IN1, tag, owner, clock), m_outer(0), m_outer_count(0), m_outer_latch(0) +{ +} + +nes_txc_22110_device::nes_txc_22110_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : nes_sxrom_device(mconfig, NES_TXC_22110, tag, owner, clock), m_latch0(0), m_mode(0) +{ +} + + + +void nes_bmc_jy012005_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_latch0)); +} + +void nes_bmc_jy012005_device::pcb_reset() +{ + m_latch0 = 0; + nes_sxrom_device::pcb_reset(); +} + +void nes_bmc_jy820845c_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_latch0)); + save_item(NAME(m_mode)); +} + +void nes_bmc_jy820845c_device::pcb_reset() +{ + nes_sxrom_device::pcb_reset(); + + m_latch0 = 0; + m_mode = 0; + update_banks(); +} + +void nes_farid_slrom_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_outer)); +} + +void nes_farid_slrom_device::pcb_reset() +{ + m_outer = 0; + nes_sxrom_device::pcb_reset(); +} + +void nes_resetsxrom_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_reset_count)); +} + +void nes_resetsxrom_device::pcb_reset() +{ + m_reset_count = (m_reset_count + 1) & 3; + nes_sxrom_device::pcb_reset(); +} + +void nes_srpg5in1_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_outer)); + save_item(NAME(m_outer_count)); + save_item(NAME(m_outer_latch)); +} + +void nes_srpg5in1_device::pcb_reset() +{ + m_outer = 0; + m_outer_count = 0; + m_outer_latch = 0; + nes_sxrom_device::pcb_reset(); +} + +void nes_txc_22110_device::device_start() +{ + nes_sxrom_device::device_start(); + save_item(NAME(m_latch0)); + save_item(NAME(m_mode)); +} + +void nes_txc_22110_device::pcb_reset() +{ + nes_sxrom_device::pcb_reset(); + + m_latch0 = 0; + m_mode = 0; + update_banks(); +} + + + +/*------------------------------------------------- + mapper specific handlers + -------------------------------------------------*/ + +/*------------------------------------------------- + + UNL-NINJARYU + + Games: Ninja Ryukenden Chinese + + This board was previously assigned to mapper 111. It has + registers akin to MMC1 but without the need to write to + them serially. The one existing game has 256K CHR, so this + must have at least 1 more bit for CHR banking. Other differences? + + In MAME: Preliminary supported. + + -------------------------------------------------*/ + +void nes_ninjaryu_device::write_h(offs_t offset, u8 data) +{ + LOG("unl_ninjaryu write_h, offset: %04x, data: %02x\n", offset, data); + u8 reg = BIT(offset, 13, 2); + m_reg[reg] = data; + update_regs(reg); +} + + +/*------------------------------------------------- + + MULTIGAME CARTS BASED ON MMC1 + + -------------------------------------------------*/ + +/*------------------------------------------------- + + BMC-JY012005 + + Games: 1998 Super HiK 8 in 1 (JY-021B) + + MMC1 clone with banking for multigame menu. + + NES 2.0: mapper 404 + + In MAME: Supported. + + -------------------------------------------------*/ + +void nes_bmc_jy012005_device::set_prg() +{ + u8 mode = !BIT(m_latch0, 6); + nes_sxrom_device::set_prg((m_latch0 & 0x07 & ~mode) << 3, mode << 3 | 0x07); +} + +void nes_bmc_jy012005_device::set_chr() +{ + nes_sxrom_device::set_chr((m_latch0 & 0x07) << 5, 0x1f); +} + +void nes_bmc_jy012005_device::write_m(offs_t offset, u8 data) +{ + LOG("bmc_jy012005 write_m, offset: %04x, data: %02x\n", offset, data); + + if (!BIT(m_latch0, 7)) // outer bank lock + { + m_latch0 = data; + set_prg(); + set_chr(); + } +} + +/*------------------------------------------------- + + BMC-JY820845C + + Games: 7 in 1 1993 Chess Series (JY-015) + + MMC1 clone with banking for multigame menu. + + NES 2.0: mapper 550 + + In MAME: Supported. + + -------------------------------------------------*/ + +void nes_bmc_jy820845c_device::update_banks() // used by menu and MHROM games +{ + prg32((m_mode & 0x07) << 1 | BIT(m_latch0, 4)); + chr8((m_mode & 0x06) << 1 | (m_latch0 & 0x03), CHRROM); +} + +void nes_bmc_jy820845c_device::write_m(offs_t offset, u8 data) +{ + LOG("bmc_jy820845c write_m, offset: %04x, data: %02x\n", offset, data); + + nes_sxrom_device::write_m(offset, data); // register overlaid on WRAM + + if (offset >= 0x1000 && !BIT(m_mode, 3)) + { + m_mode = offset & 0x0f; + if ((m_mode & 0x06) == 0x06) // MMC1 mode + { + set_prg(); + set_chr(); + } + else + update_banks(); + } +} + +void nes_bmc_jy820845c_device::write_h(offs_t offset, u8 data) +{ + LOG("bmc_jy820845c write_h, offset: %04x, data: %02x\n", offset, data); + + m_latch0 = data; + + if ((m_mode & 0x06) == 0x06) + nes_sxrom_device::write_h(offset, data); + else + update_banks(); +} + +/*------------------------------------------------- + + FARID_SLROM_8-IN-1 + + Games: 8 in 1 + + MMC1 clone with banking for multigame menu. + + NES 2.0: mapper 323 + + In MAME: Supported. + + -------------------------------------------------*/ + +void nes_farid_slrom_device::write_m(offs_t offset, u8 data) +{ + LOG("farid_slrom write_m, offset: %04x, data: %02x\n", offset, data); + if (!BIT(m_reg[3], 4) && !BIT(m_outer, 3)) // MMC1 WRAM enabled and outer bank not locked + m_outer = data; +} + +/*------------------------------------------------- + + BMC-RESET-SXROM + + Games: 4 in 1 (JY-021, JY-022, JY-051) + + MMC1 clone with outer banks switched by resetting. + + NES 2.0: mapper 374 + + In MAME: Supported. + + -------------------------------------------------*/ + +/*------------------------------------------------- + + BMC-SRPG-5IN1 (PCB has no distinguishing label) + + Games: Super RPG 5 in 1 CH501 + + MMC1 clone with banking for multigame menu. Note: This + game does not soft reset properly on real hardware. + + The interesting feature of this board is that it has a + serially written 4-bit shift register that selects the + outer game bank (meaning it has two shift registers, + since it also clones the MMC1's). The MSB (bit 3) seems + to indicate menu mode (0) or game mode (1), but it's not + clear if/how this is used. Is it a lock? We currently + don't use the MSB nor allow it to be read back. + + NES 2.0: mapper 543 + + In MAME: Supported. + + -------------------------------------------------*/ + +void nes_srpg5in1_device::write_l(offs_t offset, u8 data) +{ + LOG("srpg5in1 write_l, offset: %04x, data: %02x\n", offset, data); + + offset += 0x100; + if (offset >= 0x1000) + { + m_outer_latch = (data & 0x08) | m_outer_latch >> 1; + m_outer_count = (m_outer_count + 1) & 0x03; + if (!m_outer_count) + { + m_outer = m_outer_latch; + set_prg(); + } + } +} + +void nes_srpg5in1_device::write_m(offs_t offset, u8 data) +{ + LOG("srpg5in1 write_m, offset: %04x, data: %02x\n", offset, data); + + u8 bank = BIT(m_outer, 1) ? bitswap<3>(m_outer, 1, 2, 0) : (m_outer & 1) << 1 | BIT(m_reg[1], 3); + + if (!BIT(m_reg[3], 4)) // WRAM enabled + m_battery[((bank * 0x2000) + offset) & (m_battery.size() - 1)] = data; +} + +u8 nes_srpg5in1_device::read_m(offs_t offset) +{ + LOG("srpg5in1 read_m, offset: %04x\n", offset); + + u8 bank = BIT(m_outer, 1) ? bitswap<3>(m_outer, 1, 2, 0) : (m_outer & 1) << 1 | BIT(m_reg[1], 3); + + if (!BIT(m_reg[3], 4)) // WRAM enabled + return m_battery[((bank * 0x2000) + offset) & (m_battery.size() - 1)]; + + return get_open_bus(); +} + +/*------------------------------------------------- + + TXC 01-22110-000 Board + + Games: 2 in 1 Uzi Lightgun (MGC-002) + + This board has an MMC1 clone for Operation Wolf and + otherwise is mostly compatible with mapper 70 for + Bandai's Space Shadow. + + NES 2.0: mapper 297 + + In MAME: Supported. + + -------------------------------------------------*/ + +void nes_txc_22110_device::update_banks() // used by menu and Space Shadow +{ + u8 outer = (m_mode & 0x02) << 1; + prg16_89ab(outer | BIT(m_latch0, 4, 2)); + prg16_cdef(outer | 3); + chr8(m_latch0 & 0x0f, CHRROM); +} + +void nes_txc_22110_device::write_l(offs_t offset, u8 data) +{ + LOG("TXC 22110 write_l, offset: %04x, data: %02x\n", offset, data); + if (offset < 0x100) // $4100 - $41ff + { + m_mode = data; + if (m_mode & 1) // MMC1 mode + { + set_prg(); + set_chr(); + } + else + update_banks(); + } +} + +void nes_txc_22110_device::write_h(offs_t offset, u8 data) +{ + LOG("TXC 22110 write_h, offset: %04x, data: %02x\n", offset, data); + + if (m_mode & 1) + nes_sxrom_device::write_h(offset, data); + else + { + m_latch0 = data; + update_banks(); + } +} |