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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
#include "emu.h"
#include "superloderunner.h"
DEFINE_DEVICE_TYPE(MSX_CART_SUPERLODERUNNER, msx_cart_superloderunner_device, "msx_cart_superloderunner", "MSX Cartridge - Super Lode Runner")
msx_cart_superloderunner_device::msx_cart_superloderunner_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, MSX_CART_SUPERLODERUNNER, tag, owner, clock)
, msx_cart_interface(mconfig, *this)
, m_selected_bank(0)
, m_bank_base(nullptr)
{
}
void msx_cart_superloderunner_device::device_start()
{
save_item(NAME(m_selected_bank));
machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_superloderunner_device::restore_banks), this));
// Install evil memory write handler
address_space &space = machine().device<cpu_device>("maincpu")->space(AS_PROGRAM);
space.install_write_handler(0x0000, 0x0000, write8_delegate(FUNC(msx_cart_superloderunner_device::banking), this));
}
void msx_cart_superloderunner_device::restore_banks()
{
m_bank_base = get_rom_base() + (m_selected_bank & 0x0f) * 0x4000;
}
void msx_cart_superloderunner_device::initialize_cartridge()
{
if (get_rom_size() != 0x20000)
{
fatalerror("superloderunner: Invalid ROM size\n");
}
restore_banks();
}
READ8_MEMBER(msx_cart_superloderunner_device::read_cart)
{
if (offset >= 0x8000 && offset < 0xc000)
{
return m_bank_base[offset & 0x3fff];
}
return 0xff;
}
WRITE8_MEMBER(msx_cart_superloderunner_device::banking)
{
m_selected_bank = data;
restore_banks();
}
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