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// license:BSD-3-Clause
// copyright-holders:hap
/******************************************************************************
Videopac 31/40 cartridge emulation
4KB ROM (program ROM is fixed, data ROM is 'bankswitched' via P11)
Used in:
- #31: Musician
- #40: 4 in 1 Row
******************************************************************************/
#include "emu.h"
#include "4in1.h"
DEFINE_DEVICE_TYPE(O2_ROM_4IN1, o2_4in1_device, "o2_4in1", "Videopac 40 Cartridge")
//-------------------------------------------------
// o2_4in1_device - constructor
//-------------------------------------------------
o2_4in1_device::o2_4in1_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, O2_ROM_4IN1, tag, owner, clock),
device_o2_cart_interface(mconfig, *this)
{ }
void o2_4in1_device::device_start()
{
save_item(NAME(m_control));
save_item(NAME(m_bank));
}
void o2_4in1_device::cart_init()
{
if (m_rom_size != 0x1000)
fatalerror("o2_4in1_device: ROM size must be 4KB\n");
}
//-------------------------------------------------
// mapper specific handlers
//-------------------------------------------------
u8 o2_4in1_device::io_read(offs_t offset)
{
if (m_control & 2)
return m_rom[m_bank << 8 | offset];
else
return 0xff;
}
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