// license:BSD-3-Clause // copyright-holders:Wilbert Pol /*********************************************************************************************************** Sega AI card emulation ***********************************************************************************************************/ #include "emu.h" #include "rom.h" namespace { class segaai_rom_128_device : public device_t, public segaai_card_interface { public: segaai_rom_128_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : segaai_rom_128_device(mconfig, SEGAAI_ROM_128, tag, owner, clock) { } virtual void install_memory_handlers(address_space *space) override; protected: segaai_rom_128_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, type, tag, owner, clock) , segaai_card_interface(mconfig, *this) { } virtual void device_start() override { } }; void segaai_rom_128_device::install_memory_handlers(address_space *space) { space->install_rom(0xa0000, 0xbffff, cart_rom_region()->base()); } class segaai_rom_256_device : public segaai_rom_128_device { public: segaai_rom_256_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : segaai_rom_128_device(mconfig, SEGAAI_ROM_256, tag, owner, clock) , m_rom_bank(*this, "rombank%u", 0U) { } virtual void install_memory_handlers(address_space *space) override; private: template void bank_w(u8 data); void unknown0_w(u8 data); void unknown1_w(u8 data); memory_bank_array_creator<2> m_rom_bank; }; void segaai_rom_256_device::install_memory_handlers(address_space *space) { for (int i = 0; i < 2; i++) m_rom_bank[i]->configure_entries(0, cart_rom_region()->bytes() / 0x4000, cart_rom_region()->base(), 0x4000); space->install_rom(0xa0000, 0xa3fff, 0x10000, cart_rom_region()->base()); space->install_read_bank(0xa4000, 0xa7fff, 0x10000, m_rom_bank[0]); space->install_read_bank(0xa8000, 0xabfff, 0x10000, m_rom_bank[1]); space->install_write_handler(0xafffc, 0xafffc, 0, 0x10000, 0, emu::rw_delegate(*this, FUNC(segaai_rom_256_device::unknown0_w))); space->install_write_handler(0xafffd, 0xafffd, 0, 0x10000, 0, emu::rw_delegate(*this, FUNC(segaai_rom_256_device::unknown1_w))); space->install_write_handler(0xafffe, 0xafffe, 0, 0x10000, 0, emu::rw_delegate(*this, FUNC(segaai_rom_256_device::bank_w<0>))); space->install_write_handler(0xaffff, 0xaffff, 0, 0x10000, 0, emu::rw_delegate(*this, FUNC(segaai_rom_256_device::bank_w<1>))); } template void segaai_rom_256_device::bank_w(u8 data) { m_rom_bank[Bank]->set_entry(data & 0x0f); } void segaai_rom_256_device::unknown0_w(u8 data) { // Unknown, upon start $00 is written and sometimes $80 after that } void segaai_rom_256_device::unknown1_w(u8 data) { // Unknown, upon start $00 is written } } // anonymous namespace DEFINE_DEVICE_TYPE_PRIVATE(SEGAAI_ROM_128, segaai_card_interface, segaai_rom_128_device, "segaai_rom_128", "Sega AI Card - 128KB") DEFINE_DEVICE_TYPE_PRIVATE(SEGAAI_ROM_256, segaai_card_interface, segaai_rom_256_device, "segaai_rom_256", "Sega AI Card - 256KB")