// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
#include "emu.h"
#include "arc.h"
DEFINE_DEVICE_TYPE(MSX_CART_ARC, msx_cart_arc_device, "msx_cart_arc", "MSX Cartridge - Arc")
msx_cart_arc_device::msx_cart_arc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, MSX_CART_ARC, tag, owner, clock)
, msx_cart_interface(mconfig, *this)
, m_7f(0)
{
}
void msx_cart_arc_device::device_start()
{
// Install IO read/write handlers
io_space().install_write_handler(0x7f, 0x7f, write8smo_delegate(FUNC(msx_cart_arc_device::io_7f_w), this));
io_space().install_read_handler(0x7f, 0x7f, read8smo_delegate(FUNC(msx_cart_arc_device::io_7f_r), this));
}
void msx_cart_arc_device::device_reset()
{
m_7f = 0;
}
void msx_cart_arc_device::initialize_cartridge()
{
if (get_rom_size() != 0x8000)
{
fatalerror("arc: Invalid ROM size\n");
}
}
uint8_t msx_cart_arc_device::read_cart(offs_t offset)
{
if (offset >= 0x4000 && offset < 0xc000)
{
return get_rom_base()[offset - 0x4000];
}
return 0xff;
}
void msx_cart_arc_device::io_7f_w(uint8_t data)
{
if (data == 0x35)
{
m_7f++;
}
}
uint8_t msx_cart_arc_device::io_7f_r()
{
return ((m_7f & 0x03) == 0x03) ? 0xda : 0xff;
}