diff options
Diffstat (limited to 'src/devices/bus/nes/multigame.cpp')
-rw-r--r-- | src/devices/bus/nes/multigame.cpp | 57 |
1 files changed, 24 insertions, 33 deletions
diff --git a/src/devices/bus/nes/multigame.cpp b/src/devices/bus/nes/multigame.cpp index 511bf8856cb..4d299a7bebb 100644 --- a/src/devices/bus/nes/multigame.cpp +++ b/src/devices/bus/nes/multigame.cpp @@ -228,7 +228,7 @@ nes_bmc_s700_device::nes_bmc_s700_device(const machine_config &mconfig, const ch { } -nes_bmc_ball11_device::nes_bmc_ball11_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) +nes_bmc_ball11_device::nes_bmc_ball11_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : nes_nrom_device(mconfig, NES_BMC_BALL11, tag, owner, clock) { } @@ -741,13 +741,11 @@ void nes_bmc_ball11_device::device_start() void nes_bmc_ball11_device::pcb_reset() { - m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM; prg32(0); - chr8(0, m_chr_source); + chr8(0, CHRRAM); - m_reg[0] = 1; + m_reg[0] = 2; m_reg[1] = 0; - set_banks(); } void nes_bmc_22games_device::device_start() @@ -1963,53 +1961,46 @@ void nes_bmc_s700_device::write_h(offs_t offset, uint8_t data) BMC-BALLGAMES-11IN1 Known Boards: Unknown Multigame Bootleg Board - Games: 11 in 1 Ball Games + Games: 11 in 1 Ball Series iNES: mapper 51 - In MESS: Partially Supported. + In MAME: Supported. -------------------------------------------------*/ -void nes_bmc_ball11_device::set_banks() +u8 nes_bmc_ball11_device::read_m(offs_t offset) { - set_nt_mirroring((m_reg[0] == 3) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); + LOG_MMC(("bmc_ball11 read_m, offset: %04x, data: %02x\n", offset)); - if (m_reg[0] & 0x01) - { + u8 bank = m_reg[1] << 2 | (m_reg[0] ? 0x23 : 0x2f); + return m_prg[bank * 0x2000 + offset]; +} + +void nes_bmc_ball11_device::update_prg() +{ + if (m_reg[0]) prg32(m_reg[1]); - } else { - prg16_89ab((m_reg[1] << 1) | (m_reg[0] >> 1)); - prg16_cdef((m_reg[1] << 1) | 0x07); + prg16_89ab(m_reg[1] << 1 | BIT(m_reg[1], 4)); + prg16_cdef(m_reg[1] << 1 | 0x07); } } -void nes_bmc_ball11_device::write_m(offs_t offset, uint8_t data) +void nes_bmc_ball11_device::write_m(offs_t offset, u8 data) { LOG_MMC(("bmc_ball11 write_m, offset: %04x, data: %02x\n", offset, data)); - - m_reg[0] = ((data >> 1) & 0x01) | ((data >> 3) & 0x02); - set_banks(); + set_nt_mirroring(BIT(data, 4) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); + m_reg[0] = data & 0x02; + update_prg(); } -void nes_bmc_ball11_device::write_h(offs_t offset, uint8_t data) +void nes_bmc_ball11_device::write_h(offs_t offset, u8 data) { LOG_MMC(("bmc_ball11 write_h, offset: %04x, data: %02x\n", offset, data)); - - switch (offset & 0x6000) - { - case 0x4000: // here we also update reg[0] upper bit - m_reg[0] = (m_reg[0] & 0x01) | ((data >> 3) & 0x02); - [[fallthrough]]; - case 0x0000: - case 0x2000: - case 0x6000: - m_reg[1] = data & 0x0f; - set_banks(); - break; - } + m_reg[1] = data & 0x1f; + update_prg(); } /*------------------------------------------------- @@ -2203,7 +2194,7 @@ void nes_bmc_21in1_device::write_h(offs_t offset, uint8_t data) iNES: mapper 229 - In MESS: Supported. + In MAME: Supported. -------------------------------------------------*/ |