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-rw-r--r--src/devices/bus/nes/multigame.cpp67
1 files changed, 66 insertions, 1 deletions
diff --git a/src/devices/bus/nes/multigame.cpp b/src/devices/bus/nes/multigame.cpp
index bb4d6d90ac0..71793333747 100644
--- a/src/devices/bus/nes/multigame.cpp
+++ b/src/devices/bus/nes/multigame.cpp
@@ -66,7 +66,8 @@ DEFINE_DEVICE_TYPE(NES_BMC_HIK300, nes_bmc_hik300_device, "nes_bmc_hik30
DEFINE_DEVICE_TYPE(NES_BMC_S700, nes_bmc_s700_device, "nes_bmc_s700", "NES Cart BMC Super 700 in 1 PCB")
DEFINE_DEVICE_TYPE(NES_BMC_BALL11, nes_bmc_ball11_device, "nes_bmc_ball11", "NES Cart BMC Ball 11 in 1 PCB")
DEFINE_DEVICE_TYPE(NES_BMC_22GAMES, nes_bmc_22games_device, "nes_bmc_22games", "NES Cart BMC 22 Games PCB")
-DEFINE_DEVICE_TYPE(NES_BMC_64Y2K, nes_bmc_64y2k_device, "nes_bmc_64y2k", "NES Cart BMC 64 in 1 Y2K PCB")
+DEFINE_DEVICE_TYPE(NES_BMC_64Y2K, nes_bmc_64y2k_device, "nes_bmc_64y2k", "NES Cart BMC Y2K 64 in 1 PCB")
+DEFINE_DEVICE_TYPE(NES_BMC_420Y2K, nes_bmc_420y2k_device, "nes_bmc_420y2k", "NES Cart BMC Y2K 420 in 1 PCB")
DEFINE_DEVICE_TYPE(NES_BMC_12IN1, nes_bmc_12in1_device, "nes_bmc_12in1", "NES Cart BMC 12 in 1 PCB")
DEFINE_DEVICE_TYPE(NES_BMC_20IN1, nes_bmc_20in1_device, "nes_bmc_20in1", "NES Cart BMC 20 in 1 PCB")
DEFINE_DEVICE_TYPE(NES_BMC_21IN1, nes_bmc_21in1_device, "nes_bmc_21in1", "NES Cart BMC 21 in 1 PCB")
@@ -305,6 +306,11 @@ nes_bmc_64y2k_device::nes_bmc_64y2k_device(const machine_config &mconfig, const
{
}
+nes_bmc_420y2k_device::nes_bmc_420y2k_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : nes_nrom_device(mconfig, NES_BMC_420Y2K, tag, owner, clock), m_latch(0), m_reg(0)
+{
+}
+
nes_bmc_12in1_device::nes_bmc_12in1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: nes_nrom_device(mconfig, NES_BMC_12IN1, tag, owner, clock)
{
@@ -824,6 +830,23 @@ void nes_bmc_64y2k_device::pcb_reset()
set_nt_mirroring(PPU_MIRROR_VERT);
}
+void nes_bmc_420y2k_device::device_start()
+{
+ common_start();
+ save_item(NAME(m_latch));
+ save_item(NAME(m_reg));
+}
+
+void nes_bmc_420y2k_device::pcb_reset()
+{
+ prg16_89ab(0);
+ prg16_cdef(7);
+ chr8(0, CHRRAM);
+
+ m_latch = 0;
+ m_reg = 0;
+}
+
void nes_bmc_12in1_device::device_start()
{
common_start();
@@ -2228,6 +2251,48 @@ void nes_bmc_64y2k_device::write_h(offs_t offset, uint8_t data)
/*-------------------------------------------------
+ Board BMC-TELETUBBIES
+ (name assigned by BootGod who said the board has
+ no markings, a glop top, and an 8K VRAM chip)
+
+ Games: Y2K 420 in 1
+
+ iNES: mapper 237
+
+ In MAME: Supported.
+
+ -------------------------------------------------*/
+
+void nes_bmc_420y2k_device::write_h(offs_t offset, u8 data)
+{
+ LOG_MMC(("bmc_420y2k write_h, offset: %04x, data: %02x\n", offset, data));
+
+ if (BIT(m_latch, 1)) // lock bit
+ m_reg = (m_reg & ~0x07) | (data & 0x07);
+ else
+ {
+ m_latch = offset;
+ m_reg = data;
+ }
+
+ u8 bank = BIT(m_latch, 2) << 5 | (m_reg & 0x1f);
+ u8 mode = BIT(m_reg, 6);
+ prg16_89ab(bank & ~mode); // strangely for UNROM games it DOESN'T ignore the NROM mode bit
+ prg16_cdef(bank | (BIT(m_reg, 7) ? mode : 0x07));
+
+ set_nt_mirroring(BIT(m_reg, 5) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT);
+}
+
+u8 nes_bmc_420y2k_device::read_h(offs_t offset)
+{
+ LOG_MMC(("bmc_420y2k read_h, offset: %04x\n", offset));
+ // latch bit 0 is only used to determine the menu, and the behavior of
+ // this cart seems hardwired to OR $02 (ORing $00-$03 allows four menus)
+ return hi_access_rom(offset | (m_latch & 1) << 1);
+}
+
+/*-------------------------------------------------
+
BMC-12IN1
Unknown Bootleg Multigame Board