// license:BSD-3-Clause // copyright-holders:Fabio Priuli /*********************************************************************************************************** NES/Famicom cartridge emulation for RCM PCBs Here we emulate the following PCBs * RCM GS2004 [mapper 283] * RCM GS2013 [mapper 283 also] * RCM GS2015 [mapper 216] * RCM Tetris Family 9in1 [mapper 61] * RCM 3D Block [mapper 355] TODO: - implement PIC16C54 protection for 3D Block ***********************************************************************************************************/ #include "emu.h" #include "rcm.h" #ifdef NES_PCB_DEBUG #define VERBOSE 1 #else #define VERBOSE 0 #endif #define LOG_MMC(x) do { if (VERBOSE) logerror x; } while (0) //------------------------------------------------- // constructor //------------------------------------------------- DEFINE_DEVICE_TYPE(NES_GS2004, nes_gs2004_device, "nes_gs2004", "NES Cart RCM GS-2004 PCB") DEFINE_DEVICE_TYPE(NES_GS2013, nes_gs2013_device, "nes_gs2013", "NES Cart RCM GS-2013 PCB") DEFINE_DEVICE_TYPE(NES_GS2015, nes_gs2015_device, "nes_gs2015", "NES Cart RCM GS-2015 PCB") DEFINE_DEVICE_TYPE(NES_TF9IN1, nes_tf9_device, "nes_tetrisfam", "NES Cart RCM Tetris Family 9 in 1 PCB") DEFINE_DEVICE_TYPE(NES_3DBLOCK, nes_3dblock_device, "nes_3dblock", "NES Cart RCM 3D Block PCB") nes_gs2015_device::nes_gs2015_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : nes_nrom_device(mconfig, NES_GS2015, tag, owner, clock) { } nes_gs2004_device::nes_gs2004_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock, int bank) : nes_nrom_device(mconfig, type, tag, owner, clock), m_base(bank * 0x2000) { } nes_gs2004_device::nes_gs2004_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_gs2004_device(mconfig, NES_GS2004, tag, owner, clock, 0x20) { } nes_gs2013_device::nes_gs2013_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_gs2004_device(mconfig, NES_GS2013, tag, owner, clock, 0x1f) { } nes_tf9_device::nes_tf9_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_nrom_device(mconfig, NES_TF9IN1, tag, owner, clock) { } nes_3dblock_device::nes_3dblock_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : nes_nrom_device(mconfig, NES_3DBLOCK, tag, owner, clock), m_irq_count(0) { } void nes_gs2015_device::device_start() { common_start(); } void nes_gs2015_device::pcb_reset() { m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM; prg32(0); chr8(0, m_chr_source); } void nes_3dblock_device::device_start() { common_start(); save_item(NAME(m_reg)); save_item(NAME(m_irq_count)); } void nes_3dblock_device::pcb_reset() { prg32(0); chr8(0, CHRRAM); m_reg[0] = 0; m_reg[1] = 0; m_reg[2] = 0; m_reg[3] = 0; m_irq_count = 0; } /*------------------------------------------------- mapper specific handlers -------------------------------------------------*/ /*------------------------------------------------- RCM GS2015 Board Games: Bonza, Magic Jewelry 2 Very simple mapper: writes to 0x8000-0xffff sets prg32 to offset and chr8 to offset>>1 (when chrrom is present) iNES: mapper 216 In MAME: Partially supported. Bonza games have some sort of card inputs for gambling purposes. -------------------------------------------------*/ void nes_gs2015_device::write_h(offs_t offset, uint8_t data) { LOG_MMC(("gs2015 write_h, offset: %04x, data: %02x\n", offset, data)); prg32(offset); chr8(offset >> 1, m_chr_source); } uint8_t nes_gs2015_device::read_m(offs_t offset) { LOG_MMC(("gs2015 read_m, offset: %04x\n", offset)); return 0; // Videopoker Bonza needs this (sort of protection? or related to inputs?) } /*------------------------------------------------- Boards BMC-GS2004, BMC-GS2013 Games: Tetris Family 6-in-1, 5-in-1, 12-in-1 NES 2.0: mapper 283 In MAME: Supported. -------------------------------------------------*/ u8 nes_gs2004_device::read_m(offs_t offset) { LOG_MMC(("gs2004 read_m, offset: %04x\n", offset)); return m_prg[m_base + offset]; // fixed base differs per device } void nes_gs2004_device::write_h(offs_t offset, u8 data) { LOG_MMC(("gs2004 write_h, offset: %04x, data: %02x\n", offset, data)); prg32(data); } /*------------------------------------------------- Bootleg Board by RCM for Tetris Family Games: Tetris Family 9 in 1, 20 in 1 iNES: mapper 61 In MAME: Supported. -------------------------------------------------*/ void nes_tf9_device::write_h(offs_t offset, u8 data) { LOG_MMC(("tetrisfam write_h, offset: %04x, data: %02x\n", offset, data)); u8 bank = (offset & 0x0f) << 1 | BIT(offset, 5); u8 mode = !BIT(offset, 4); prg16_89ab(bank & ~mode); prg16_cdef(bank | mode); set_nt_mirroring(BIT(offset, 7) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); } /*------------------------------------------------- Bootleg Board by RCM for 3-D Block Games: 3-D Block Hwang Shinwei version NES 2.0: mapper 355 In MESS: Very Preliminary Support. What is the purpose of the writes to $4800-$4900-$4a00? These writes also happens on the RCM version, which however works (probably an unused leftover code in that version) FCEUmm suggests it might be IRQ related, but it does not seem to help much... -------------------------------------------------*/ void nes_3dblock_device::hblank_irq(int scanline, int vblank, int blanked) { if (m_irq_count) { m_irq_count--; if (!m_irq_count) hold_irq_line(); } } void nes_3dblock_device::write_l(offs_t offset, uint8_t data) { LOG_MMC(("3dblock write_l, offset: %04x, data: %02x\n", offset, data)); offset += 0x100; switch (offset) { case 0x800: // $4800 m_reg[0] = data; break; case 0x900: // $4900 m_reg[1] = data; break; case 0xa00: // $4a00 m_reg[2] = data; break; case 0xe00: // $4e00 m_reg[3] = data; m_irq_count = 0x10; break; } }