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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
#include "emu.h"
#include "rom.h"
DEFINE_DEVICE_TYPE(MSX_SLOT_ROM, msx_slot_rom_device, "msx_slot_rom", "MSX Internal ROM")
msx_slot_rom_device::msx_slot_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: msx_slot_rom_device(mconfig, MSX_SLOT_ROM, tag, owner, clock)
{
}
msx_slot_rom_device::msx_slot_rom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, type, tag, owner, clock)
, msx_internal_slot_interface(mconfig, *this)
, m_rom_region(*this, finder_base::DUMMY_TAG)
, m_region_offset(0)
, m_rom(nullptr)
{
}
void msx_slot_rom_device::device_start()
{
// Sanity checks
if (m_rom_region->bytes() < m_region_offset + m_size)
{
fatalerror("Memory region '%s' is too small for rom slot '%s'\n", m_rom_region.finder_tag(), tag());
}
m_rom = m_rom_region->base() + m_region_offset;
}
uint8_t msx_slot_rom_device::read(offs_t offset)
{
if (offset >= m_start_address && offset < m_end_address)
{
return m_rom[offset - m_start_address];
}
return 0xFF;
}
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