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#include "emu.h"
#include "hfox.h"
const device_type MSX_CART_HFOX = &device_creator<msx_cart_hfox>;
msx_cart_hfox::msx_cart_hfox(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, MSX_CART_HFOX, "MSX Cartridge - Harry Fox", tag, owner, clock, "msx_cart_hfox", __FILE__)
, msx_cart_interface(mconfig, *this)
{
m_selected_bank[0] = m_selected_bank[1] = 0;
m_bank_base[0] = m_bank_base[1] = NULL;
}
void msx_cart_hfox::device_start()
{
save_item(NAME(m_selected_bank));
machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_hfox::restore_banks), this));
}
void msx_cart_hfox::restore_banks()
{
m_bank_base[0] = get_rom_base() + ((m_selected_bank[0] & 0x01) * 0x8000);
m_bank_base[1] = get_rom_base() + ((m_selected_bank[1] & 0x01) * 0x8000) + 0x4000;
}
void msx_cart_hfox::device_reset()
{
m_selected_bank[0] = m_selected_bank[1] = 0;
}
void msx_cart_hfox::initialize_cartridge()
{
if (get_rom_size() < 0x10000)
{
fatalerror("rtype: Invalid ROM size\n");
}
restore_banks();
}
READ8_MEMBER(msx_cart_hfox::read_cart)
{
if (offset >= 0x4000 && offset < 0xc000)
{
return m_bank_base[offset >> 15][offset & 0x3fff];
}
return 0xff;
}
WRITE8_MEMBER(msx_cart_hfox::write_cart)
{
switch (offset)
{
case 0x6000:
m_selected_bank[0] = data;
restore_banks();
break;
case 0x7000:
m_selected_bank[1] = data;
restore_banks();
break;
default:
printf("msx_cart_hfox: unhandled write %02x to %04x\n", data, offset);
break;
}
}
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