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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************
PC-Engine & Turbografx-16 HuCard emulation
***********************************************************************************************************/
#include "emu.h"
#include "pce_rom.h"
//-------------------------------------------------
// pce_rom_device - constructor
//-------------------------------------------------
DEFINE_DEVICE_TYPE(PCE_ROM_STD, pce_rom_device, "pce_rom", "PCE/TG16 HuCards")
DEFINE_DEVICE_TYPE(PCE_ROM_POPULOUS, pce_populous_device, "pce_populous", "PCE Populous HuCard")
DEFINE_DEVICE_TYPE(PCE_ROM_SF2, pce_sf2_device, "pce_sf2", "PCE Street Fighter 2 CE HuCard")
DEFINE_DEVICE_TYPE(PCE_ROM_TENNOKOE, pce_tennokoe_device, "pce_tennokoe", "PCE Tennokoe Bank HuCard")
pce_rom_device::pce_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)
, device_pce_cart_interface(mconfig, *this)
{
}
pce_rom_device::pce_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: pce_rom_device(mconfig, PCE_ROM_STD, tag, owner, clock)
{
}
pce_populous_device::pce_populous_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: pce_rom_device(mconfig, PCE_ROM_POPULOUS, tag, owner, clock)
{
}
pce_sf2_device::pce_sf2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: pce_rom_device(mconfig, PCE_ROM_SF2, tag, owner, clock)
, m_rom_bank(*this, "rom_bank")
{
}
pce_tennokoe_device::pce_tennokoe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: pce_rom_device(mconfig, PCE_ROM_TENNOKOE, tag, owner, clock)
, device_nvram_interface(mconfig, *this)
{
}
//-------------------------------------------------
// mapper specific start/reset
//-------------------------------------------------
void pce_sf2_device::device_reset()
{
m_rom_bank->set_entry(0);
}
void pce_tennokoe_device::device_start()
{
save_item(NAME(m_bram));
save_item(NAME(m_bram_locked));
}
void pce_tennokoe_device::device_reset()
{
m_bram_locked = 1;
}
// Tennokoe Bank is a special HuCard containing x4 Backup RAM banks,
// the software can transfer
void pce_tennokoe_device::nvram_default()
{
memset(m_bram, 0xff, m_bram_size);
// easter egg: load copy of a BRAM (debug leftover?) inside bank 4.
// Contains 14 save blocks, mostly at the end of the various games.
// Not entirely correct but not incorrect as well to just unlock these saves for public use,
// for testing reasons and for a slim chance of actually be supposed as default data in the bank(s)
// File list:
// 001 NEUTOPIA1
// 002 MOTURBO-1
// 003 MOMODE2-1
// 004 MOMOKATSU.
// 005 BOMBERMAN1
// 006 POPULOUS.
// 007 ADVENTURE1 (Starts in HuMan form at the village with 983040 gold, basically before the last dungeon);
// 008 TENGAI1
// 009 COBRA1
// 010 YS.DATA.01 (right before the switch between Ys 1 and 2, read book to move on);
// 011 YS.DATA.02
// 012 YS3.DAT.01 (right before the end, go to the right bridge for the ending);
// 013 URUSEI1
// 014 MITUBATI1
// TODO: document the other saves.
memcpy(m_bram + 0x1800, m_rom + 0x8800, 0x800);
}
bool pce_tennokoe_device::nvram_read(util::read_stream &file)
{
auto const [err, actual] = read(file, m_bram, m_bram_size);
return !err && (actual == m_bram_size);
}
bool pce_tennokoe_device::nvram_write(util::write_stream &file)
{
auto const [err, actual] = write(file, m_bram, m_bram_size);
return !err;
}
/*-------------------------------------------------
mapper specific handlers
-------------------------------------------------*/
uint8_t pce_rom_device::rom_r(offs_t offset)
{
int bank = offset / 0x20000;
return m_rom[rom_bank_map[bank] * 0x20000 + (offset & 0x1ffff)];
}
void pce_rom_device::install_memory_handlers(address_space &space)
{
space.install_read_handler(0x00000, 0xfffff, emu::rw_delegate(*this, FUNC(pce_rom_device::rom_r)));
}
void pce_populous_device::install_memory_handlers(address_space &space)
{
pce_rom_device::install_memory_handlers(space);
space.install_ram(0x80000, 0x87fff, &m_ram[0]);
}
void pce_sf2_device::bank_w(offs_t offset, uint8_t data)
{
m_rom_bank->set_entry(offset & 3);
}
void pce_sf2_device::install_memory_handlers(address_space &space)
{
m_rom_bank->configure_entries(0, 4, m_rom + 0x80000, 0x80000);
space.install_rom(0x000000, 0x07ffff, m_rom);
space.install_read_bank(0x080000, 0x0fffff, m_rom_bank);
space.install_write_handler(0x001ff0, 0x001ff3, emu::rw_delegate(*this, FUNC(pce_sf2_device::bank_w)));
}
uint8_t pce_tennokoe_device::bram_r(offs_t offset)
{
if (m_bram_locked)
return 0xff;
else
return m_bram[offset & (m_bram_size-1)];
}
void pce_tennokoe_device::bram_w(offs_t offset, uint8_t data)
{
if (!m_bram_locked)
m_bram[offset & (m_bram_size-1)] = data;
}
void pce_tennokoe_device::bram_lock_w(offs_t offset, uint8_t data)
{
// TODO: lock/unlock mechanism is a complete guess, needs real HW study
m_bram_locked = (data == 0);
}
void pce_tennokoe_device::install_memory_handlers(address_space &space)
{
space.install_rom(0x000000, 0x07ffff, m_rom);
space.install_readwrite_handler(0x080000, 0x081fff, 0, 0x00e000, 0, emu::rw_delegate(*this, FUNC(pce_tennokoe_device::bram_r)), emu::rw_delegate(*this, FUNC(pce_tennokoe_device::bram_w)));
// (writes to ports $c0000, $d0000, $f0000)
space.install_write_handler(0x0f0000, 0x0f0000, 0, 0x00ffff, 0, emu::rw_delegate(*this, FUNC(pce_tennokoe_device::bram_lock_w)));
}
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