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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/***************************************************************************
dirom.h
Interface to a rom, either through a memory map or a region
***************************************************************************/
#ifndef MAME_EMU_DIROM_H
#define MAME_EMU_DIROM_H
#pragma once
// Beware, DataWidth is 0-3
template<int AddrWidth, int DataWidth = 0, int AddrShift = 0, endianness_t Endian = ENDIANNESS_LITTLE> class device_rom_interface : public device_memory_interface
{
public:
device_rom_interface(const machine_config &mconfig, device_t &device);
virtual ~device_rom_interface() = default;
template <typename... T> void set_map(T &&... args) { set_addrmap(0, std::forward<T>(args)...); }
template <typename T> void set_device_rom_tag(T &&tag) { m_rom_region.set_tag(std::forward<T>(tag)); }
template <typename T> void set_space(T &&tag, int spacenum) { m_rom_space.set_tag(tag, spacenum); }
u8 read_byte(offs_t addr) { return m_rom_cache.read_byte(addr); }
u16 read_word(offs_t addr) { return m_rom_cache.read_word(addr); }
u32 read_dword(offs_t addr) { return m_rom_cache.read_dword(addr); }
u64 read_qword(offs_t addr) { return m_rom_cache.read_qword(addr); }
void set_rom(const void *base, u32 size);
void set_rom_bank(int bank);
protected:
virtual void rom_bank_pre_change() { }
virtual void rom_bank_post_change() { }
virtual space_config_vector memory_space_config() const override;
void override_address_width(u8 width);
private:
optional_memory_region m_rom_region;
optional_address_space m_rom_space;
address_space_config m_rom_config;
typename memory_access<AddrWidth, DataWidth, AddrShift, Endian>::cache m_rom_cache;
memory_bank_creator m_bank;
u32 m_cur_bank, m_bank_count;
virtual void interface_validity_check(validity_checker &valid) const override;
virtual void interface_pre_start() override;
virtual void interface_post_start() override;
virtual void interface_post_load() override;
};
#include "dirom.ipp"
#endif // MAME_EMU_DIROM_H
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