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// 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, emu::rw_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);
}
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