diff options
Diffstat (limited to 'src/devices/bus/nes/konami.cpp')
-rw-r--r-- | src/devices/bus/nes/konami.cpp | 328 |
1 files changed, 137 insertions, 191 deletions
diff --git a/src/devices/bus/nes/konami.cpp b/src/devices/bus/nes/konami.cpp index 6416d7d06b5..5f20821a5b0 100644 --- a/src/devices/bus/nes/konami.cpp +++ b/src/devices/bus/nes/konami.cpp @@ -16,11 +16,6 @@ * Konami VRC-6 [mapper 24,26] * Konami VRC-7 [mapper 85] - - TODO: - - improve IRQ (CPU mode not currently emulated) - - add VRC-6 sound features - ***********************************************************************************************************/ @@ -50,28 +45,28 @@ DEFINE_DEVICE_TYPE(NES_VRC6, nes_konami_vrc6_device, "nes_vrc6", "NES Cart Konam DEFINE_DEVICE_TYPE(NES_VRC7, nes_konami_vrc7_device, "nes_vrc7", "NES Cart Konami VRC-7 PCB") -nes_konami_vrc1_device::nes_konami_vrc1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc1_device::nes_konami_vrc1_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_nrom_device(mconfig, NES_VRC1, tag, owner, clock) { } -nes_konami_vrc2_device::nes_konami_vrc2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc2_device::nes_konami_vrc2_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock) : nes_nrom_device(mconfig, type, tag, owner, clock), m_latch(0) { } -nes_konami_vrc2_device::nes_konami_vrc2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc2_device::nes_konami_vrc2_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_konami_vrc2_device(mconfig, NES_VRC2, tag, owner, clock) { } -nes_konami_vrc3_device::nes_konami_vrc3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc3_device::nes_konami_vrc3_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_nrom_device(mconfig, NES_VRC3, tag, owner, clock), m_irq_count(0), m_irq_count_latch(0), m_irq_enable(0), m_irq_enable_latch(0), m_irq_mode(0), irq_timer(nullptr) { } nes_konami_vrc4_device::nes_konami_vrc4_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock) - : nes_nrom_device(mconfig, type, tag, owner, clock), m_prg_flip(0), m_irq_count(0), m_irq_count_latch(0), m_irq_enable(0), m_irq_enable_latch(0), m_irq_mode(0), m_irq_prescale(0), irq_timer(nullptr) + : nes_nrom_device(mconfig, type, tag, owner, clock), m_prg_flip(0), m_wram_enable(0), m_irq_count(0), m_irq_count_latch(0), m_irq_enable(0), m_irq_enable_latch(0), m_irq_mode(0), m_irq_prescale(0), irq_timer(nullptr) { } @@ -80,12 +75,12 @@ nes_konami_vrc4_device::nes_konami_vrc4_device(const machine_config &mconfig, co { } -nes_konami_vrc6_device::nes_konami_vrc6_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc6_device::nes_konami_vrc6_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_konami_vrc4_device(mconfig, NES_VRC6, tag, owner, clock), m_vrc6snd(*this, "vrc6snd") { } -nes_konami_vrc7_device::nes_konami_vrc7_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_konami_vrc7_device::nes_konami_vrc7_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_konami_vrc4_device(mconfig, NES_VRC7, tag, owner, clock), m_vrc7snd(*this, "vrc7snd") { } @@ -105,7 +100,7 @@ void nes_konami_vrc1_device::pcb_reset() prg16_cdef(m_prg_chunks - 1); chr8(0, m_chr_source); - memset(m_mmc_vrom_bank, 0, sizeof(m_mmc_vrom_bank)); + m_mmc_vrom_bank[0] = m_mmc_vrom_bank[1] = 0; } void nes_konami_vrc2_device::device_start() @@ -123,7 +118,7 @@ void nes_konami_vrc2_device::pcb_reset() chr8(0, m_chr_source); m_latch = 0; - memset(m_mmc_vrom_bank, 0, sizeof(m_mmc_vrom_bank)); + std::fill(std::begin(m_mmc_vrom_bank), std::end(m_mmc_vrom_bank), 0x00); } void nes_konami_vrc3_device::device_start() @@ -153,7 +148,6 @@ void nes_konami_vrc3_device::pcb_reset() m_irq_count_latch = 0; } - void nes_konami_vrc4_device::device_start() { common_start(); @@ -167,6 +161,7 @@ void nes_konami_vrc4_device::device_start() save_item(NAME(m_irq_count)); save_item(NAME(m_irq_count_latch)); save_item(NAME(m_prg_flip)); + save_item(NAME(m_wram_enable)); save_item(NAME(m_mmc_prg_bank)); save_item(NAME(m_mmc_vrom_bank)); } @@ -184,46 +179,17 @@ void nes_konami_vrc4_device::pcb_reset() m_irq_count_latch = 0; m_prg_flip = 0; + m_wram_enable = 0; m_mmc_prg_bank[0] = 0; m_mmc_prg_bank[1] = 0; set_prg(); std::fill(std::begin(m_mmc_vrom_bank), std::end(m_mmc_vrom_bank), 0x00); } -void nes_konami_vrc6_device::device_start() -{ - nes_konami_vrc4_device::device_start(); -} - -void nes_konami_vrc7_device::device_start() -{ - common_start(); - irq_timer = timer_alloc(TIMER_IRQ); - irq_timer->adjust(attotime::zero, 0, clocks_to_attotime(1)); - - save_item(NAME(m_irq_mode)); - save_item(NAME(m_irq_prescale)); - save_item(NAME(m_irq_enable)); - save_item(NAME(m_irq_enable_latch)); - save_item(NAME(m_irq_count)); - save_item(NAME(m_irq_count_latch)); -} - void nes_konami_vrc7_device::pcb_reset() { - m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM; - prg8_89(0); - prg8_ab(0); - prg8_cd(0); - prg8_ef(0xff); - chr8(0, m_chr_source); - - m_irq_mode = 0; - m_irq_prescale = 0; - m_irq_enable = 0; - m_irq_enable_latch = 0; - m_irq_count = 0; - m_irq_count_latch = 0; + nes_konami_vrc4_device::pcb_reset(); + prg32((m_prg_chunks >> 1) - 1); } @@ -240,29 +206,25 @@ void nes_konami_vrc7_device::pcb_reset() iNES: mapper 75 - In MESS: Supported. + In MAME: Supported. -------------------------------------------------*/ -void nes_konami_vrc1_device::write_h(offs_t offset, uint8_t data) +void nes_konami_vrc1_device::write_h(offs_t offset, u8 data) { LOG_MMC(("VRC-1 write_h, offset: %04x, data: %02x\n", offset, data)); switch (offset & 0x7000) { case 0x0000: - prg8_89(data); - break; case 0x2000: - prg8_ab(data); - break; case 0x4000: - prg8_cd(data); + prg8_x(BIT(offset, 13, 2), data & 0x0f); break; case 0x1000: - set_nt_mirroring((data & 0x01) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); - m_mmc_vrom_bank[0] = (m_mmc_vrom_bank[0] & 0x0f) | ((data & 0x02) << 3); - m_mmc_vrom_bank[1] = (m_mmc_vrom_bank[1] & 0x0f) | ((data & 0x04) << 2); + set_nt_mirroring(data & 1 ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); + m_mmc_vrom_bank[0] = (m_mmc_vrom_bank[0] & 0x0f) | BIT(data, 1) << 4; + m_mmc_vrom_bank[1] = (m_mmc_vrom_bank[1] & 0x0f) | BIT(data, 2) << 4; chr4_0(m_mmc_vrom_bank[0], CHRROM); chr4_4(m_mmc_vrom_bank[1], CHRROM); break; @@ -281,11 +243,11 @@ void nes_konami_vrc1_device::write_h(offs_t offset, uint8_t data) Konami VRC-2 - In MESS: Supported. + In MAME: Supported. -------------------------------------------------*/ -uint8_t nes_konami_vrc2_device::read_m(offs_t offset) +u8 nes_konami_vrc2_device::read_m(offs_t offset) { LOG_MMC(("VRC-2 read_m, offset: %04x\n", offset)); @@ -293,11 +255,11 @@ uint8_t nes_konami_vrc2_device::read_m(offs_t offset) return m_battery[offset & (m_battery.size() - 1)]; else if (!m_prgram.empty()) return m_prgram[offset & (m_prgram.size() - 1)]; - else // sort of protection? it returns open bus in $7000-$7fff and (open bus & 0xfe) | m_latch in $6000-$6fff - return (offset < 0x1000) ? ((get_open_bus() & 0xfe) | (m_latch & 1)) : get_open_bus(); + else // VRC2 was planned with EEPROM support; the non-working feature behaves as a vestigial 1-bit latch in $6000-$6fff on certain boards (contraj, ggoemon2 depend on this) + return (offset < 0x1000) ? (get_open_bus() & 0xfe) | (m_latch & 1) : get_open_bus(); } -void nes_konami_vrc2_device::write_m(offs_t offset, uint8_t data) +void nes_konami_vrc2_device::write_m(offs_t offset, u8 data) { LOG_MMC(("VRC-2 write_m, offset: %04x, data: %02x\n", offset, data)); @@ -309,19 +271,17 @@ void nes_konami_vrc2_device::write_m(offs_t offset, uint8_t data) m_latch = data; } -void nes_konami_vrc2_device::write_h(offs_t offset, uint8_t data) +void nes_konami_vrc2_device::write_h(offs_t offset, u8 data) { - uint8_t bank, shift, mask; - uint16_t add_lines = ((offset << (9 - m_vrc_ls_prg_a)) & 0x200) | ((offset << (8 - m_vrc_ls_prg_b)) & 0x100); LOG_MMC(("VRC-2 write_h, offset: %04x, data: %02x\n", offset, data)); + u8 addr_lines = bitswap<2>(offset, m_vrc_ls_prg_a, m_vrc_ls_prg_b); + switch (offset & 0x7000) { case 0x0000: - prg8_89(data); - break; case 0x2000: - prg8_ab(data); + prg8_x(BIT(offset, 13), data); break; case 0x1000: set_nt_mirroring(data & 1 ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); @@ -330,12 +290,14 @@ void nes_konami_vrc2_device::write_h(offs_t offset, uint8_t data) case 0x4000: case 0x5000: case 0x6000: - bank = ((offset & 0x7000) - 0x3000) / 0x0800 + BIT(add_lines, 9); - shift = BIT(add_lines, 8) * 4; - mask = (0xf0 >> shift); - m_mmc_vrom_bank[bank] = (m_mmc_vrom_bank[bank] & mask) | (((data >> m_vrc_ls_chr) & 0x0f) << shift); - chr1_x(bank, m_mmc_vrom_bank[bank], CHRROM); + { + int bank = 2 * (BIT(offset, 12, 3) - 3) + BIT(addr_lines, 1); + int shift = BIT(addr_lines, 0) * 4; + int mask = 0x0f << shift; + m_mmc_vrom_bank[bank] = (m_mmc_vrom_bank[bank] & ~mask) | (((data >> m_vrc_ls_chr) << shift) & mask); + chr1_x(bank, m_mmc_vrom_bank[bank], m_chr_source); break; + } default: logerror("VRC-2 write_h uncaught write, addr: %04x value: %02x\n", offset + 0x8000, data); break; @@ -350,7 +312,7 @@ void nes_konami_vrc2_device::write_h(offs_t offset, uint8_t data) iNES: mapper 73 - In MESS: Supported. + In MAME: Supported. -------------------------------------------------*/ @@ -360,53 +322,40 @@ void nes_konami_vrc3_device::device_timer(emu_timer &timer, device_timer_id id, { if (m_irq_enable) { - if (m_irq_mode) // 8bits mode - { - if ((m_irq_count & 0x00ff) == 0xff) - { - set_irq_line(ASSERT_LINE); - m_irq_count = m_irq_count_latch; - } - else - m_irq_count = (m_irq_count & 0xff00) | ((m_irq_count & 0x00ff) + 1); - } - else // 16bits mode + u16 mask = m_irq_mode ? 0x00ff : 0xffff; // 8 or 16 bit mode? + + // upper byte only incremented and reloaded in 16-bit mode + m_irq_count = (m_irq_count & ~mask) | ((m_irq_count + 1) & mask); + if (!(m_irq_count & mask)) { - if (m_irq_count == 0xffff) - { - set_irq_line(ASSERT_LINE); - m_irq_count = m_irq_count_latch; - } - else - m_irq_count++; + set_irq_line(ASSERT_LINE); + m_irq_count = (m_irq_count & ~mask) | (m_irq_count_latch & mask); } } } } -void nes_konami_vrc3_device::write_h(offs_t offset, uint8_t data) +void nes_konami_vrc3_device::write_h(offs_t offset, u8 data) { LOG_MMC(("VRC-3 write_h, offset: %04x, data: %02x\n", offset, data)); switch (offset & 0x7000) { case 0x0000: - m_irq_count_latch = (m_irq_count_latch & 0xfff0) | ((data & 0x0f) << 0); - break; case 0x1000: - m_irq_count_latch = (m_irq_count_latch & 0xff0f) | ((data & 0x0f) << 4); - break; case 0x2000: - m_irq_count_latch = (m_irq_count_latch & 0xf0ff) | ((data & 0x0f) << 8); - break; case 0x3000: - m_irq_count_latch = (m_irq_count_latch & 0x0fff) | ((data & 0x0f) << 12); + { + int shift = 4 * BIT(offset, 12, 2); + m_irq_count_latch &= ~(0x000f << shift); + m_irq_count_latch |= (data & 0x0f) << shift; break; + } case 0x4000: m_irq_mode = data & 0x04; m_irq_enable = data & 0x02; m_irq_enable_latch = data & 0x01; - if (data & 0x02) + if (m_irq_enable) m_irq_count = m_irq_count_latch; set_irq_line(CLEAR_LINE); break; @@ -415,7 +364,7 @@ void nes_konami_vrc3_device::write_h(offs_t offset, uint8_t data) set_irq_line(CLEAR_LINE); break; case 0x7000: - prg16_89ab(data); + prg16_89ab(data & 0x07); break; default: logerror("VRC-3 write_h uncaught write, offset %04x, data: %02x\n", offset, data); @@ -505,12 +454,30 @@ void nes_konami_vrc4_device::set_prg(int prg_base, int prg_mask) prg8_x(3, prg_base | prg_mask); } +u8 nes_konami_vrc4_device::read_m(offs_t offset) +{ + LOG_MMC(("VRC-4 read_m, offset: %04x\n", offset)); + + if (m_wram_enable) + return device_nes_cart_interface::read_m(offset); + else + return get_open_bus(); +} + +void nes_konami_vrc4_device::write_m(offs_t offset, u8 data) +{ + LOG_MMC(("VRC-4 write_m, offset: %04x, data: %02x\n", offset, data)); + + if (m_wram_enable) + device_nes_cart_interface::write_m(offset, data); +} + void nes_konami_vrc4_device::write_h(offs_t offset, u8 data) { - int bank, shift, mask; - u16 add_lines = ((offset << (9 - m_vrc_ls_prg_a)) & 0x200) | ((offset << (8 - m_vrc_ls_prg_b)) & 0x100); LOG_MMC(("VRC-4 write_h, offset: %04x, data: %02x\n", offset, data)); + u8 addr_lines = bitswap<2>(offset, m_vrc_ls_prg_a, m_vrc_ls_prg_b); + switch (offset & 0x7000) { case 0x0000: @@ -519,8 +486,9 @@ void nes_konami_vrc4_device::write_h(offs_t offset, u8 data) set_prg(); break; case 0x1000: - if (add_lines & 0x200) + if (BIT(addr_lines, 1)) { + m_wram_enable = data & 0x01; m_prg_flip = data & 0x02; set_prg(); } @@ -531,32 +499,31 @@ void nes_konami_vrc4_device::write_h(offs_t offset, u8 data) case 0x4000: case 0x5000: case 0x6000: - bank = ((offset & 0x7000) - 0x3000) / 0x0800 + BIT(add_lines, 9); - shift = BIT(add_lines, 8) * 4; - mask = shift ? 0x1f0 : 0x0f; + { + int bank = 2 * (BIT(offset, 12, 3) - 3) + BIT(addr_lines, 1); + int shift = BIT(addr_lines, 0) * 4; + int mask = shift ? 0x1f0 : 0x0f; m_mmc_vrom_bank[bank] = (m_mmc_vrom_bank[bank] & ~mask) | ((data << shift) & mask); chr1_x(bank, m_mmc_vrom_bank[bank], m_chr_source); break; + } case 0x7000: - switch (add_lines) + switch (addr_lines) { - case 0x000: + case 0: m_irq_count_latch = (m_irq_count_latch & 0xf0) | (data & 0x0f); break; - case 0x100: - m_irq_count_latch = (m_irq_count_latch & 0x0f) | ((data & 0x0f) << 4); + case 1: + m_irq_count_latch = (m_irq_count_latch & 0x0f) | (data & 0x0f) << 4; break; - case 0x200: + case 2: irq_ctrl_w(data); break; - case 0x300: + case 3: irq_ack_w(); break; } break; - default: - logerror("VRC-4 write_h uncaught write, addr: %04x value: %02x\n", ((offset & 0x7000) | add_lines) + 0x8000, data); - break; } } @@ -564,62 +531,64 @@ void nes_konami_vrc4_device::write_h(offs_t offset, u8 data) Konami VRC-6 - In MESS: Supported. It also uses konami_irq (there are IRQ + In MAME: Supported. It also uses konami_irq (there are IRQ issues though: see Akumajou Densetsu intro). + TODO: Implement other CHR modes not used by any of + the three released VRC6 games? + -------------------------------------------------*/ -void nes_konami_vrc6_device::write_h(offs_t offset, uint8_t data) +void nes_konami_vrc6_device::write_h(offs_t offset, u8 data) { - uint8_t bank; - uint16_t add_lines = ((offset << (9 - m_vrc_ls_prg_a)) & 0x200) | ((offset << (8 - m_vrc_ls_prg_b)) & 0x100); LOG_MMC(("VRC-6 write_h, offset: %04x, data: %02x\n", offset, data)); + u8 addr_lines = bitswap<2>(offset, m_vrc_ls_prg_a, m_vrc_ls_prg_b); + switch (offset & 0x7000) { case 0x0000: - prg16_89ab(data); + prg16_89ab(data & 0x0f); break; case 0x4000: - prg8_cd(data); + prg8_cd(data & 0x1f); break; case 0x1000: // pulse 1 & global control - m_vrc6snd->write(add_lines>>8, data); + m_vrc6snd->write(addr_lines, data); break; case 0x2000: // pulse 2 - m_vrc6snd->write((add_lines>>8) | 0x100, data); + m_vrc6snd->write(addr_lines | 0x100, data); break; case 0x3000: - if (add_lines == 0x300) + if (addr_lines == 3) + { set_mirror(data >> 2); + m_wram_enable = BIT(data, 7); + } else // saw - m_vrc6snd->write((add_lines>>8) | 0x200, data); + m_vrc6snd->write(addr_lines | 0x200, data); break; case 0x5000: case 0x6000: - bank = ((offset & 0x7000) - 0x5000) / 0x0400 + ((add_lines & 0x0300) >> 8); - chr1_x(bank, data, CHRROM); + chr1_x(4 * BIT(offset, 13) + addr_lines, data, CHRROM); break; case 0x7000: - switch (add_lines) + switch (addr_lines) { - case 0x000: + case 0: m_irq_count_latch = data; break; - case 0x100: + case 1: irq_ctrl_w(data); break; - case 0x200: + case 2: irq_ack_w(); break; default: - logerror("VRC-6 write_h uncaught write, addr: %04x value: %02x\n", ((offset & 0x7000) | add_lines) + 0x8000, data); + logerror("VRC-6 write_h uncaught write, addr: %04x value: %02x\n", ((offset & 0x7000) | addr_lines) + 0x8000, data); break; } break; - default: - logerror("VRC-6 write_h uncaught write, addr: %04x value: %02x\n", ((offset & 0x7000) | add_lines) + 0x8000, data); - break; } } @@ -646,75 +615,52 @@ void nes_konami_vrc6_device::device_add_mconfig(machine_config &config) iNES: mapper 85 - In MESS: Supported. It also uses konami_irq. + In MAME: Supported. It also uses konami_irq. -------------------------------------------------*/ -void nes_konami_vrc7_device::write_h(offs_t offset, uint8_t data) +void nes_konami_vrc7_device::write_h(offs_t offset, u8 data) { - uint8_t bank; LOG_MMC(("VRC-7 write_h, offset: %04x, data: %02x\n", offset, data)); - switch (offset & 0x7038) - { - case 0x0000: - prg8_89(data); - break; - case 0x0008: - case 0x0010: - case 0x0018: - prg8_ab(data); - break; - - case 0x1000: - prg8_cd(data); - break; - - case 0x1010: - case 0x1018: - m_vrc7snd->address_w(data); - break; - case 0x1030: - case 0x1038: - m_vrc7snd->data_w(data); - break; + u8 reg = bitswap<4>(offset, 14, 13, 12, m_vrc_ls_prg_a); - case 0x2000: - case 0x2008: - case 0x2010: - case 0x2018: - case 0x3000: - case 0x3008: - case 0x3010: - case 0x3018: - case 0x4000: - case 0x4008: - case 0x4010: - case 0x4018: - case 0x5000: - case 0x5008: - case 0x5010: - case 0x5018: - bank = ((offset & 0x7000) - 0x2000) / 0x0800 + ((offset & 0x0018) ? 1 : 0); - chr1_x(bank, data, m_chr_source); - break; - - case 0x6000: + switch (reg) + { + case 0x0: + case 0x1: + case 0x2: + prg8_x(reg, data & 0x3f); + break; + case 0x3: + if (BIT(offset, 5)) + m_vrc7snd->data_w(data); + else + m_vrc7snd->address_w(data); + break; + case 0x4: + case 0x5: + case 0x6: + case 0x7: + case 0x8: + case 0x9: + case 0xa: + case 0xb: + chr1_x(reg - 4, data, m_chr_source); + break; + case 0xc: set_mirror(data); + m_wram_enable = BIT(data, 7); break; - case 0x6008: case 0x6010: case 0x6018: + case 0xd: m_irq_count_latch = data; break; - case 0x7000: + case 0xe: irq_ctrl_w(data); break; - case 0x7008: case 0x7010: case 0x7018: + case 0xf: irq_ack_w(); break; - - default: - logerror("VRC-7 write_h uncaught write, addr: %04x value: %02x\n", offset + 0x8000, data); - break; } } |