// license:BSD-3-Clause // copyright-holders:Fabio Priuli, Wilbert Pol /*********************************************************************************************************** PC-Engine & Turbografx-16 Super System Card emulation ***********************************************************************************************************/ #include "emu.h" #include "pce_scdsys.h" //------------------------------------------------- // pce_cdsys3_device - constructor //------------------------------------------------- DEFINE_DEVICE_TYPE(PCE_ROM_CDSYS3J, pce_cdsys3j_device, "pce_cdsys3j", "PCE Super System Card") DEFINE_DEVICE_TYPE(PCE_ROM_CDSYS3U, pce_cdsys3u_device, "pce_cdsys3u", "TG16 Super System Card") pce_cdsys3_device::pce_cdsys3_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock) , device_pce_cart_interface(mconfig, *this) , m_scdsys() { } pce_cdsys3j_device::pce_cdsys3j_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : pce_cdsys3_device(mconfig, PCE_ROM_CDSYS3J, tag, owner, clock) { } pce_cdsys3u_device::pce_cdsys3u_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : pce_cdsys3_device(mconfig, PCE_ROM_CDSYS3U, tag, owner, clock) { } pce_scdsys_shared::pce_scdsys_shared() : m_ram(nullptr) , m_region(false) { } //------------------------------------------------- // mapper specific start/reset //------------------------------------------------- void pce_cdsys3_device::device_start() { m_scdsys.init(*this); m_scdsys.set_region(false); } void pce_cdsys3u_device::device_start() { pce_cdsys3_device::device_start(); m_scdsys.set_region(true); } void pce_scdsys_shared::init(device_t &device) { m_ram = make_unique_clear(0x30000); device.save_pointer(NAME(m_ram), 0x30000); } /*------------------------------------------------- mapper specific handlers -------------------------------------------------*/ uint8_t pce_scdsys_shared::register_r(offs_t offset) { switch (offset & 0x0f) { // TODO: 0x1 through 0x3 is Super CD-ROM²/PCE Duo stuff? case 0x1: return 0xaa; case 0x2: return 0x55; case 0x3: return 0x00; case 0x5: return (m_region) ? 0x55 : 0xaa; case 0x6: return (m_region) ? 0xaa : 0x55; case 0x7: return 0x03; } return 0x00; } void pce_cdsys3_device::install_memory_handlers(address_space &space) { // TODO: ROM address mirrored? space.install_rom(0x000000, 0x03ffff, 0x040000, m_rom); space.install_ram(0x0d0000, 0x0fffff, m_scdsys.ram()); space.install_read_handler(0x1ff8c0, 0x1ff8c7, 0, 0x330, 0, emu::rw_delegate(*this, FUNC(pce_cdsys3_device::register_r))); }