// license: BSD-3-Clause // copyright-holders: Angelo Salese /************************************************************************************************** Maxflash TODO: - alt flash configs; - alt buggy revision of 1MB version, with m_bank starting at 0x7f; **************************************************************************************************/ #include "emu.h" #include "maxflash.h" // device type definition DEFINE_DEVICE_TYPE(A800_MAXFLASH_128KB, a800_maxflash_128kb_device, "maxflash_128kb", "Atari 8-bit Atarimax Maxflash 128K flash ROM cart") DEFINE_DEVICE_TYPE(A800_MAXFLASH_1MB, a800_maxflash_1mb_device, "maxflash_1mb", "Atari 8-bit Atarimax Maxflash 1MB flash ROM cart") a800_maxflash_128kb_device::a800_maxflash_128kb_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : a800_rom_device(mconfig, type, tag, owner, clock) , m_flash(*this, "flash") , m_bank(0) { } a800_maxflash_128kb_device::a800_maxflash_128kb_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : a800_maxflash_128kb_device(mconfig, A800_MAXFLASH_128KB, tag, owner, clock) { } void a800_maxflash_128kb_device::device_add_mconfig(machine_config &config) { AMD_29F010(config, m_flash); // TODO: alt config with Micron M29F010B ($20/$20) } void a800_maxflash_128kb_device::device_start() { save_item(NAME(m_bank)); } void a800_maxflash_128kb_device::device_reset() { // TODO: ugly assignment, and shouldn't happen in device_reset // TODO: assert against intended size for slot memcpy(m_flash->base(), m_rom, get_rom_size()); // NB: this starts with 0x7f in the older Atarimax 1MB version m_bank = 0; } void a800_maxflash_128kb_device::cart_map(address_map &map) { map(0x2000, 0x3fff).lrw8( NAME([this](offs_t offset) { return m_flash->read((offset & 0x1fff) + (m_bank * 0x2000)); }), NAME([this](offs_t offset, u8 data) { m_flash->write((offset & 0x1fff) + (m_bank * 0x2000), data); }) ); } void a800_maxflash_128kb_device::cctl_map(address_map &map) { map(0x00, 0x0f).rw(FUNC(a800_maxflash_128kb_device::rom_bank_r), FUNC(a800_maxflash_128kb_device::rom_bank_w)); map(0x10, 0x1f).rw(FUNC(a800_maxflash_128kb_device::disable_rom_r), FUNC(a800_maxflash_128kb_device::disable_rom_w)); } uint8_t a800_maxflash_128kb_device::disable_rom_r(offs_t offset) { if(!machine().side_effects_disabled()) rd5_w(0); return 0xff; } void a800_maxflash_128kb_device::disable_rom_w(offs_t offset, uint8_t data) { rd5_w(0); } uint8_t a800_maxflash_128kb_device::rom_bank_r(offs_t offset) { if(!machine().side_effects_disabled()) { rd5_w(1); m_bank = (offset & m_bank_mask); } return 0xff; } void a800_maxflash_128kb_device::rom_bank_w(offs_t offset, uint8_t data) { rd5_w(1); m_bank = (offset & m_bank_mask); } // 8MB overrides a800_maxflash_1mb_device::a800_maxflash_1mb_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : a800_maxflash_128kb_device(mconfig, A800_MAXFLASH_1MB, tag, owner, clock) { } void a800_maxflash_1mb_device::device_add_mconfig(machine_config &config) { // TODO: AMD_29F040B according to Altirra? // AMD_29F040 doesn't match 0x100000 size requirement, 'B is still 4 megabits? // replace it with a suitable flash device for now INTEL_E28F008SA(config, m_flash); // TODO: alt config with Bright BM29F040 ($ad/$40) } void a800_maxflash_1mb_device::cctl_map(address_map &map) { map(0x00, 0x7f).rw(FUNC(a800_maxflash_1mb_device::rom_bank_r), FUNC(a800_maxflash_1mb_device::rom_bank_w)); map(0x80, 0xff).rw(FUNC(a800_maxflash_1mb_device::disable_rom_r), FUNC(a800_maxflash_1mb_device::disable_rom_w)); }