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#include "emu.h"
#include "dooly.h"
const device_type MSX_CART_DOOLY = &device_creator<msx_cart_dooly>;
msx_cart_dooly::msx_cart_dooly(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, MSX_CART_DOOLY, "MSX Cartridge - Dooly", tag, owner, clock, "msx_cart_dooly", __FILE__)
, msx_cart_interface(mconfig, *this)
, m_prot(0)
{
}
void msx_cart_dooly::device_start()
{
save_item(NAME(m_prot));
}
void msx_cart_dooly::device_reset()
{
m_prot = 0;
}
void msx_cart_dooly::initialize_cartridge()
{
if (get_rom_size() != 0x8000)
{
fatalerror("dooly: Invalid ROM size\n");
}
}
READ8_MEMBER(msx_cart_dooly::read_cart)
{
if (offset >= 0x4000 && offset < 0xc000)
{
UINT8 data = get_rom_base()[offset - 0x4000];
switch (m_prot)
{
case 0x04:
data = BITSWAP8(data, 7, 6, 5, 4, 3, 1, 0, 2);
break;
}
return data;
}
return 0xff;
}
WRITE8_MEMBER(msx_cart_dooly::write_cart)
{
if (offset >= 0x4000 && offset < 0xc000)
{
m_prot = data & 0x07;
if (m_prot != 0 && m_prot != 4)
{
logerror("msx_cart_dooly: unhandled write %02x to %04x\n", data, offset);
}
}
}
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