// license:BSD-3-Clause // copyright-holders:Wilbert Pol /* Emulation of the games mapper as found in AX-230 machines. */ #include "emu.h" #include "ax230.h" DEFINE_DEVICE_TYPE(MSX_SLOT_AX230, msx_slot_ax230_device, "msx_slot_ax230", "MSX Internal AX230") msx_slot_ax230_device::msx_slot_ax230_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, MSX_SLOT_AX230, tag, owner, clock) , msx_internal_slot_interface(mconfig, *this) , m_rom_region(*this, finder_base::DUMMY_TAG) , m_rombank(*this, "rombank%u", 0U) , m_region_offset(0) { } void msx_slot_ax230_device::device_start() { // Sanity checks if (m_rom_region->bytes() < m_region_offset + 0x100000) { fatalerror("Memory region '%s' is too small for the AX230 firmware\n", m_rom_region.finder_tag()); } for (int i = 0; i < 4; i++) { m_rombank[i]->configure_entries(0, BANKS, m_rom_region->base() + m_region_offset, 0x2000); } page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]); page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]); page(1)->install_write_handler(0x6000, 0x7fff, write8sm_delegate(*this, FUNC(msx_slot_ax230_device::mapper_write))); page(2)->install_read_bank(0x8000, 0x9fff, m_rombank[2]); page(2)->install_read_bank(0xa000, 0xbfff, m_rombank[3]); } void msx_slot_ax230_device::device_reset() { for (int i = 0; i < 4; i++) m_rombank[i]->set_entry(0); } void msx_slot_ax230_device::mapper_write(offs_t offset, u8 data) { m_rombank[(offset / 0x800) & 0x03]->set_entry(data & BANK_MASK); }