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Merge pull request #2965 from DavidHaywood/231217

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allow ddpdojh to actually run code from ram rather than treating ram as rom (even if the game doesn't actually care)
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MetalliC 2017-12-23 21:57:30 +02:00 committed by GitHub
commit 5da8d17691
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 54 additions and 17 deletions
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6
src/mame/drivers/igs_m036.cpp
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@ -294,7 +294,7 @@ DRIVER_INIT_MEMBER(igs_m036_state, cjdh2)
DRIVER_INIT_CALL(igs_m036);
igs036_decryptor decrypter(cjdh2_key);
decrypter.decrypter_rom(memregion("user1"));
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0);
}
DRIVER_INIT_MEMBER(igs_m036_state, cjddzsp)
@ -302,7 +302,7 @@ DRIVER_INIT_MEMBER(igs_m036_state, cjddzsp)
DRIVER_INIT_CALL(igs_m036);
igs036_decryptor decrypter(cjddzsp_key);
decrypter.decrypter_rom(memregion("user1"));
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0);
}
DRIVER_INIT_MEMBER(igs_m036_state, igsm312)
@ -310,7 +310,7 @@ DRIVER_INIT_MEMBER(igs_m036_state, igsm312)
DRIVER_INIT_CALL(igs_m036);
igs036_decryptor decrypter(m312cn_key);
decrypter.decrypter_rom(memregion("user1"));
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0);
}
/***************************************************************************

53
src/mame/drivers/pgm2.cpp
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@ -123,12 +123,20 @@ WRITE32_MEMBER(pgm2_state::sprite_encryption_w)
m_realspritekey = bitswap<32>(m_spritekey ^ 0x90055555, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31);
}
WRITE32_MEMBER(pgm2_state::encryption_do_w)
{
if (m_has_decrypted == 0)
if (m_romboard_ram)
{
igs036_decryptor decrypter(m_encryption_table);
decrypter.decrypter_rom(memregion("user1"));
decrypter.decrypter_rom((uint16_t*)&m_romboard_ram[0], 0x0200000, 0);
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0x0200000); // assume the rom at 0x0200000 also gets decrypted as if it was at 0x0200000 even if it isn't used (the game has already copied it to RAM where it properly decrypted)
m_has_decrypted = 1;
}
else
{
igs036_decryptor decrypter(m_encryption_table);
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0);
m_has_decrypted = 1;
}
}
@ -352,7 +360,6 @@ static ADDRESS_MAP_START( pgm2_map, AS_PROGRAM, 32, pgm2_state )
AM_RANGE(0x03900000, 0x03900003) AM_READ_PORT("INPUTS0")
AM_RANGE(0x03a00000, 0x03a00003) AM_READ_PORT("INPUTS1")
AM_RANGE(0x10000000, 0x10ffffff) AM_ROM AM_REGION("user1", 0) // external ROM
AM_RANGE(0x20000000, 0x2007ffff) AM_RAM AM_SHARE("mainram")
AM_RANGE(0x30000000, 0x30001fff) AM_RAM AM_SHARE("sp_videoram") // spriteram ('move' ram in test mode)
@ -404,6 +411,18 @@ static ADDRESS_MAP_START( pgm2_map, AS_PROGRAM, 32, pgm2_state )
AM_RANGE(0xfffffc00, 0xfffffcff) AM_READWRITE8(encryption_r, encryption_w, 0xffffffff)
ADDRESS_MAP_END
static ADDRESS_MAP_START( pgm2_rom_map, AS_PROGRAM, 32, pgm2_state )
AM_RANGE(0x10000000, 0x10ffffff) AM_ROM AM_REGION("user1", 0) // external ROM
AM_IMPORT_FROM(pgm2_map)
ADDRESS_MAP_END
static ADDRESS_MAP_START( pgm2_ram_rom_map, AS_PROGRAM, 32, pgm2_state )
AM_RANGE(0x10000000, 0x101fffff) AM_RAM AM_SHARE("romboard_ram") // we should also probably decrypt writes once the encryption is enabled, but the game never writes with it turned on anyway
AM_RANGE(0x10200000, 0x103fffff) AM_ROM AM_REGION("user1", 0) // external ROM
AM_IMPORT_FROM(pgm2_map)
ADDRESS_MAP_END
static INPUT_PORTS_START( pgm2 )
PORT_START("INPUTS0")
PORT_BIT( 0x00000001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
@ -517,6 +536,11 @@ void pgm2_state::machine_reset()
m_realspritekey = 0;
m_mcu_last_cmd = 0;
m_share_bank = 0;
// as the decryption is dynamic controlled by the program, restore the encrypted copy
memcpy(memregion("user1")->base(), &m_encrypted_copy[0], memregion("user1")->bytes());
m_has_decrypted = 0;
}
static const gfx_layout tiles8x8_layout =
@ -556,7 +580,7 @@ static MACHINE_CONFIG_START( pgm2 )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", IGS036, 100000000) // ?? ARM based CPU, has internal ROM.
MCFG_CPU_PROGRAM_MAP(pgm2_map)
MCFG_CPU_PROGRAM_MAP(pgm2_rom_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", pgm2_state, igs_interrupt)
MCFG_TIMER_DRIVER_ADD("mcu_timer", pgm2_state, igs_interrupt2)
@ -605,6 +629,10 @@ static MACHINE_CONFIG_DERIVED( pgm2_lores, pgm2 )
MCFG_SCREEN_VISIBLE_AREA(0, 320-1, 0, 240-1)
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( pgm2_ramrom, pgm2 )
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_PROGRAM_MAP(pgm2_ram_rom_map)
MACHINE_CONFIG_END
/* using macros for the video / sound roms because the locations never change between sets, and
we're going to have a LOT of clones to cover all the internal rom regions and external rom revision
@ -799,9 +827,8 @@ ROM_START( ddpdojh )
ROM_REGION( 0x04000, "maincpu", 0 )
ROM_LOAD( "ddpdoj_igs036_china.rom", 0x00000000, 0x0004000, CRC(5db91464) SHA1(723d8086285805bd815e62120dfa9a4269bcd932) )
ROM_REGION( 0x1000000, "user1", 0 )
ROM_LOAD( "ddpdoj_v201cn.u4", 0x00200000, 0x0200000, CRC(89e4b760) SHA1(9fad1309da31d12a413731b416a8bbfdb304ed9e) )
ROM_RELOAD( 0x000000, 0x200000 ) // HACK! actually here is RAM, ROM (encrypted) copied here by internal firmware
ROM_REGION( 0x0200000, "user1", 0 )
ROM_LOAD( "ddpdoj_v201cn.u4", 0x00000000, 0x0200000, CRC(89e4b760) SHA1(9fad1309da31d12a413731b416a8bbfdb304ed9e) )
DDPDOJH_VIDEO_SOUND_ROMS
ROM_END
@ -1075,6 +1102,10 @@ READ32_MEMBER(pgm2_state::ddpdojh_speedup2_r)
// for games with the internal ROMs fully dumped that provide the sprite key and program rom key at runtime
void pgm2_state::common_encryption_init()
{
// store off a copy of the encrypted rom so we can restore it later when needed
m_encrypted_copy.resize(memregion("user1")->bytes());
memcpy(&m_encrypted_copy[0], memregion("user1")->base(), memregion("user1")->bytes());
uint16_t *src = (uint16_t *)memregion("sprites_mask")->base();
iga_u12_decode(src, memregion("sprites_mask")->bytes(), 0x0000);
@ -1118,8 +1149,12 @@ DRIVER_INIT_MEMBER(pgm2_state,kov3)
sprite_colour_decode(src, 0x8000000);
igs036_decryptor decrypter(kov3_key);
decrypter.decrypter_rom(memregion("user1"));
decrypter.decrypter_rom((uint16_t*)memregion("user1")->base(), memregion("user1")->bytes(), 0);
m_has_decrypted = 1;
m_encrypted_copy.resize(memregion("user1")->bytes());
memcpy(&m_encrypted_copy[0], memregion("user1")->base(), memregion("user1")->bytes());
}
void pgm2_state::decrypt_kov3_module(uint32_t addrxor, uint16_t dataxor)
@ -1180,7 +1215,7 @@ GAME( 2008, kov2nl_301, kov2nl, pgm2, pgm2, pgm2_state, kov2nl,
GAME( 2008, kov2nl_300, kov2nl, pgm2, pgm2, pgm2_state, kov2nl, ROT0, "IGS", "Knights of Valour 2 New Legend (V300, China)", 0 ) // was dumped from a Taiwan board tho
// Dodonpachi Daioujou Tamashii - should be a V200 too
GAME( 2010, ddpdojh, 0, pgm2, pgm2, pgm2_state, ddpdojh, ROT270, "IGS", "Dodonpachi Daioujou Tamashii (V201, China)", MACHINE_IMPERFECT_GRAPHICS )
GAME( 2010, ddpdojh, 0, pgm2_ramrom, pgm2, pgm2_state, ddpdojh, ROT270, "IGS", "Dodonpachi Daioujou Tamashii (V201, China)", MACHINE_IMPERFECT_GRAPHICS )
// Knights of Valour 3 - should be a V103 and V101 too
GAME( 2011, kov3, 0, pgm2, pgm2, pgm2_state, kov3_104, ROT0, "IGS", "Knights of Valour 3 (V104, China)", MACHINE_NOT_WORKING )

4
src/mame/includes/pgm2.h
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@ -28,6 +28,7 @@ public:
m_lineram(*this, "lineram"),
m_sp_zoom(*this, "sp_zoom"),
m_mainram(*this, "mainram"),
m_romboard_ram(*this, "romboard_ram"),
m_fg_videoram(*this, "fg_videoram"),
m_bg_videoram(*this, "bg_videoram"),
m_sp_videoram(*this, "sp_videoram"),
@ -127,12 +128,15 @@ private:
uint8_t m_mcu_last_cmd;
void mcu_command(address_space &space, bool is_command);
std::vector<uint8_t> m_encrypted_copy;
// devices
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
required_shared_ptr<uint32_t> m_lineram;
required_shared_ptr<uint32_t> m_sp_zoom;
required_shared_ptr<uint32_t> m_mainram;
optional_shared_ptr<uint32_t> m_romboard_ram;
required_shared_ptr<uint32_t> m_fg_videoram;
required_shared_ptr<uint32_t> m_bg_videoram;
required_shared_ptr<uint32_t> m_sp_videoram;

6
src/mame/machine/igs036crypt.cpp
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@ -66,13 +66,11 @@ igs036_decryptor::igs036_decryptor(const uint8_t* game_key)
{
}
void igs036_decryptor::decrypter_rom(memory_region* region)
void igs036_decryptor::decrypter_rom(uint16_t* rom, int size, int offset)
{
int size = region->bytes();
uint16_t* rom = (uint16_t*)region->base();
for (int i = 0; i < size / 2; i++)
{
rom[i] = decrypt(rom[i], i);
rom[i] = decrypt(rom[i], i+offset);
}
}

2
src/mame/machine/igs036crypt.h
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@ -8,7 +8,7 @@ class igs036_decryptor
{
public:
igs036_decryptor(const uint8_t* game_key);
void decrypter_rom(memory_region* region);
void decrypter_rom(uint16_t* rom, int size, int offset);
uint16_t decrypt(uint16_t cipherword, int word_address)const;
uint16_t deobfuscate(uint16_t cipherword, int word_address)const;