/*************************************************************************** Neo-Geo hardware protection devices unknown devices ssideki, fatfury2, fatfury3, kof98, mslugx SMA chip kof99, garou, garouo, mslug3, kof2002 custom banking, random number generator encryption (see machine/neocrypt.c) internal rom data PVC chip mslug5, kof2003, svcchaos ***************************************************************************/ #include "driver.h" #include "neogeo.h" static UINT32 fatfury2_prot_data; static UINT16 neogeo_rng; static UINT16 *pvc_cartridge_ram; /************************ Fatal Fury 2 *************************/ static READ16_HANDLER( fatfury2_protection_16_r ) { UINT16 res = fatfury2_prot_data >> 24; switch (offset) { case 0x55550/2: case 0xffff0/2: case 0x00000/2: case 0xff000/2: case 0x36000/2: case 0x36008/2: return res; case 0x36004/2: case 0x3600c/2: return ((res & 0xf0) >> 4) | ((res & 0x0f) << 4); default: logerror("unknown protection read at pc %06x, offset %08x\n",activecpu_get_pc(),offset<<1); return 0; } } static WRITE16_HANDLER( fatfury2_protection_16_w ) { switch (offset) { case 0x11112/2: /* data == 0x1111; expects 0xff000000 back */ fatfury2_prot_data = 0xff000000; break; case 0x33332/2: /* data == 0x3333; expects 0x0000ffff back */ fatfury2_prot_data = 0x0000ffff; break; case 0x44442/2: /* data == 0x4444; expects 0x00ff0000 back */ fatfury2_prot_data = 0x00ff0000; break; case 0x55552/2: /* data == 0x5555; read back from 55550, ffff0, 00000, ff000 */ fatfury2_prot_data = 0xff00ff00; break; case 0x56782/2: /* data == 0x1234; read back from 36000 *or* 36004 */ fatfury2_prot_data = 0xf05a3601; break; case 0x42812/2: /* data == 0x1824; read back from 36008 *or* 3600c */ fatfury2_prot_data = 0x81422418; break; case 0x55550/2: case 0xffff0/2: case 0xff000/2: case 0x36000/2: case 0x36004/2: case 0x36008/2: case 0x3600c/2: fatfury2_prot_data <<= 8; break; default: logerror("unknown protection write at pc %06x, offset %08x, data %02x\n",activecpu_get_pc(),offset,data); break; } } void fatfury2_install_protection(void) { /* the protection involves reading and writing addresses in the */ /* 0x2xxxxx range. There are several checks all around the code. */ memory_install_readwrite16_handler(0, ADDRESS_SPACE_PROGRAM, 0x200000, 0x2fffff, 0, 0, fatfury2_protection_16_r, fatfury2_protection_16_w); state_save_register_global(fatfury2_prot_data); } /************************ King of Fighters 98******************* The encrypted set has a rom overlay feature, checked at various points in the game ***************************************************************/ static WRITE16_HANDLER ( kof98_prot_w ) { /* info from razoola */ UINT16* mem16 = (UINT16*)memory_region(NEOGEO_REGION_MAIN_CPU_CARTRIDGE); switch (data) { case 0x0090: logerror ("%06x kof98 - protection 0x0090 old %04x %04x\n",activecpu_get_pc(), mem16[0x100/2], mem16[0x102/2]); mem16[0x100/2] = 0x00c2; mem16[0x102/2] = 0x00fd; break; case 0x00f0: logerror ("%06x kof98 - protection 0x00f0 old %04x %04x\n",activecpu_get_pc(), mem16[0x100/2], mem16[0x102/2]); mem16[0x100/2] = 0x4e45; mem16[0x102/2] = 0x4f2d; break; default: // 00aa is written, but not needed? logerror ("%06x kof98 - unknown protection write %04x\n",activecpu_get_pc(), data); break; } } void install_kof98_protection(void) { /* when 0x20aaaa contains 0x0090 (word) then 0x100 (normally the neogeo header) should return 0x00c200fd worked out using real hw */ memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x20aaaa, 0x20aaab, 0, 0, kof98_prot_w); } /************************ Metal Slug X ************************* todo: emulate, not patch! ***************************************************************/ void mslugx_install_protection(void) { int i; UINT16 *mem16 = (UINT16 *)memory_region(NEOGEO_REGION_MAIN_CPU_CARTRIDGE); for (i = 0;i < (0x100000/2) - 4;i++) { if (mem16[i+0] == 0x0243 && mem16[i+1] == 0x0001 && /* andi.w #$1, D3 */ mem16[i+2] == 0x6600) /* bne xxxx */ { mem16[i+2] = 0x4e71; mem16[i+3] = 0x4e71; } } mem16[0x3bdc/2] = 0x4e71; mem16[0x3bde/2] = 0x4e71; mem16[0x3be0/2] = 0x4e71; mem16[0x3c0c/2] = 0x4e71; mem16[0x3c0e/2] = 0x4e71; mem16[0x3c10/2] = 0x4e71; mem16[0x3c36/2] = 0x4e71; mem16[0x3c38/2] = 0x4e71; } /************************ SMA Protection************************ thanks to Razoola ***************************************************************/ static WRITE16_HANDLER( kof99_bankswitch_w ) { int bankaddress; static int bankoffset[64] = { 0x000000, 0x100000, 0x200000, 0x300000, 0x3cc000, 0x4cc000, 0x3f2000, 0x4f2000, 0x407800, 0x507800, 0x40d000, 0x50d000, 0x417800, 0x517800, 0x420800, 0x520800, 0x424800, 0x524800, 0x429000, 0x529000, 0x42e800, 0x52e800, 0x431800, 0x531800, 0x54d000, 0x551000, 0x567000, 0x592800, 0x588800, 0x581800, 0x599800, 0x594800, 0x598000, /* rest not used? */ }; /* unscramble bank number */ data = (((data>>14)&1)<<0)+ (((data>> 6)&1)<<1)+ (((data>> 8)&1)<<2)+ (((data>>10)&1)<<3)+ (((data>>12)&1)<<4)+ (((data>> 5)&1)<<5); bankaddress = 0x100000 + bankoffset[data]; neogeo_set_main_cpu_bank_address(bankaddress); } static WRITE16_HANDLER( garou_bankswitch_w ) { /* thanks to Razoola and Mr K for the info */ int bankaddress; static int bankoffset[64] = { 0x000000, 0x100000, 0x200000, 0x300000, // 00 0x280000, 0x380000, 0x2d0000, 0x3d0000, // 04 0x2f0000, 0x3f0000, 0x400000, 0x500000, // 08 0x420000, 0x520000, 0x440000, 0x540000, // 12 0x498000, 0x598000, 0x4a0000, 0x5a0000, // 16 0x4a8000, 0x5a8000, 0x4b0000, 0x5b0000, // 20 0x4b8000, 0x5b8000, 0x4c0000, 0x5c0000, // 24 0x4c8000, 0x5c8000, 0x4d0000, 0x5d0000, // 28 0x458000, 0x558000, 0x460000, 0x560000, // 32 0x468000, 0x568000, 0x470000, 0x570000, // 36 0x478000, 0x578000, 0x480000, 0x580000, // 40 0x488000, 0x588000, 0x490000, 0x590000, // 44 0x5d0000, 0x5d8000, 0x5e0000, 0x5e8000, // 48 0x5f0000, 0x5f8000, 0x600000, /* rest not used? */ }; /* unscramble bank number */ data = (((data>> 5)&1)<<0)+ (((data>> 9)&1)<<1)+ (((data>> 7)&1)<<2)+ (((data>> 6)&1)<<3)+ (((data>>14)&1)<<4)+ (((data>>12)&1)<<5); bankaddress = 0x100000 + bankoffset[data]; neogeo_set_main_cpu_bank_address(bankaddress); } static WRITE16_HANDLER( garouo_bankswitch_w ) { /* thanks to Razoola and Mr K for the info */ int bankaddress; static int bankoffset[64] = { 0x000000, 0x100000, 0x200000, 0x300000, // 00 0x280000, 0x380000, 0x2d0000, 0x3d0000, // 04 0x2c8000, 0x3c8000, 0x400000, 0x500000, // 08 0x420000, 0x520000, 0x440000, 0x540000, // 12 0x598000, 0x698000, 0x5a0000, 0x6a0000, // 16 0x5a8000, 0x6a8000, 0x5b0000, 0x6b0000, // 20 0x5b8000, 0x6b8000, 0x5c0000, 0x6c0000, // 24 0x5c8000, 0x6c8000, 0x5d0000, 0x6d0000, // 28 0x458000, 0x558000, 0x460000, 0x560000, // 32 0x468000, 0x568000, 0x470000, 0x570000, // 36 0x478000, 0x578000, 0x480000, 0x580000, // 40 0x488000, 0x588000, 0x490000, 0x590000, // 44 0x5d8000, 0x6d8000, 0x5e0000, 0x6e0000, // 48 0x5e8000, 0x6e8000, 0x6e8000, 0x000000, // 52 0x000000, 0x000000, 0x000000, 0x000000, // 56 0x000000, 0x000000, 0x000000, 0x000000, // 60 }; /* unscramble bank number */ data = (((data>> 4)&1)<<0)+ (((data>> 8)&1)<<1)+ (((data>>14)&1)<<2)+ (((data>> 2)&1)<<3)+ (((data>>11)&1)<<4)+ (((data>>13)&1)<<5); bankaddress = 0x100000 + bankoffset[data]; neogeo_set_main_cpu_bank_address(bankaddress); } static WRITE16_HANDLER( mslug3_bankswitch_w ) { /* thanks to Razoola and Mr K for the info */ int bankaddress; static int bankoffset[64] = { 0x000000, 0x020000, 0x040000, 0x060000, // 00 0x070000, 0x090000, 0x0b0000, 0x0d0000, // 04 0x0e0000, 0x0f0000, 0x120000, 0x130000, // 08 0x140000, 0x150000, 0x180000, 0x190000, // 12 0x1a0000, 0x1b0000, 0x1e0000, 0x1f0000, // 16 0x200000, 0x210000, 0x240000, 0x250000, // 20 0x260000, 0x270000, 0x2a0000, 0x2b0000, // 24 0x2c0000, 0x2d0000, 0x300000, 0x310000, // 28 0x320000, 0x330000, 0x360000, 0x370000, // 32 0x380000, 0x390000, 0x3c0000, 0x3d0000, // 36 0x400000, 0x410000, 0x440000, 0x450000, // 40 0x460000, 0x470000, 0x4a0000, 0x4b0000, // 44 0x4c0000, /* rest not used? */ }; /* unscramble bank number */ data = (((data>>14)&1)<<0)+ (((data>>12)&1)<<1)+ (((data>>15)&1)<<2)+ (((data>> 6)&1)<<3)+ (((data>> 3)&1)<<4)+ (((data>> 9)&1)<<5); bankaddress = 0x100000 + bankoffset[data]; neogeo_set_main_cpu_bank_address(bankaddress); } static WRITE16_HANDLER( kof2000_bankswitch_w ) { /* thanks to Razoola and Mr K for the info */ int bankaddress; static int bankoffset[64] = { 0x000000, 0x100000, 0x200000, 0x300000, // 00 0x3f7800, 0x4f7800, 0x3ff800, 0x4ff800, // 04 0x407800, 0x507800, 0x40f800, 0x50f800, // 08 0x416800, 0x516800, 0x41d800, 0x51d800, // 12 0x424000, 0x524000, 0x523800, 0x623800, // 16 0x526000, 0x626000, 0x528000, 0x628000, // 20 0x52a000, 0x62a000, 0x52b800, 0x62b800, // 24 0x52d000, 0x62d000, 0x52e800, 0x62e800, // 28 0x618000, 0x619000, 0x61a000, 0x61a800, // 32 }; /* unscramble bank number */ data = (((data>>15)&1)<<0)+ (((data>>14)&1)<<1)+ (((data>> 7)&1)<<2)+ (((data>> 3)&1)<<3)+ (((data>>10)&1)<<4)+ (((data>> 5)&1)<<5); bankaddress = 0x100000 + bankoffset[data]; neogeo_set_main_cpu_bank_address(bankaddress); } static READ16_HANDLER( prot_9a37_r ) { return 0x9a37; } /* information about the sma random number generator provided by razoola */ /* this RNG is correct for KOF99, other games might be different */ static READ16_HANDLER( sma_random_r ) { UINT16 old = neogeo_rng; UINT16 newbit = ((neogeo_rng >> 2) ^ (neogeo_rng >> 3) ^ (neogeo_rng >> 5) ^ (neogeo_rng >> 6) ^ (neogeo_rng >> 7) ^ (neogeo_rng >>11) ^ (neogeo_rng >>12) ^ (neogeo_rng >>15)) & 1; neogeo_rng = (neogeo_rng << 1) | newbit; return old; } void neogeo_reset_rng(void) { neogeo_rng = 0x2345; } static void sma_install_random_read_handler(int addr1, int addr2) { state_save_register_global(neogeo_rng); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, addr1, addr1 + 1, 0, 0, sma_random_r); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, addr2, addr2 + 2, 0, 0, sma_random_r); } void kof99_install_protection(void) { memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2ffff0, 0x2ffff1, 0, 0, kof99_bankswitch_w); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe446, 0x2fe447, 0, 0, prot_9a37_r); sma_install_random_read_handler(0x2ffff8, 0x2ffffa); } void garou_install_protection(void) { memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fffc0, 0x2fffc1, 0, 0, garou_bankswitch_w); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe446, 0x2fe447, 0, 0, prot_9a37_r); sma_install_random_read_handler(0x2fffcc, 0x2ffff0); } void garouo_install_protection(void) { memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fffc0, 0x2fffc1, 0, 0, garouo_bankswitch_w); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe446, 0x2fe447, 0, 0, prot_9a37_r); sma_install_random_read_handler(0x2fffcc, 0x2ffff0); } void mslug3_install_protection(void) { memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fffe4, 0x2fffe5, 0, 0, mslug3_bankswitch_w); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe446, 0x2fe447, 0, 0, prot_9a37_r); // sma_install_random_read_handler(0x2ffff8, 0x2ffffa); } void kof2000_install_protection(void) { memory_install_write16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fffec, 0x2fffed, 0, 0, kof2000_bankswitch_w); memory_install_read16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe446, 0x2fe447, 0, 0, prot_9a37_r); sma_install_random_read_handler(0x2fffd8, 0x2fffda); } /************************ PVC Protection *********************** mslug5, svcchaos, kof2003 ***************************************************************/ static void pvc_w8(offs_t offset, UINT8 data) { *(((UINT8*)pvc_cartridge_ram)+BYTE_XOR_LE(offset))=data; } static UINT8 pvc_r8(offs_t offset) { return *(((UINT8*)pvc_cartridge_ram)+BYTE_XOR_LE(offset)); } static void pvc_prot1( void ) { UINT8 b1, b2; b1 = pvc_r8(0x1fe1); b2 = pvc_r8(0x1fe0); pvc_w8(0x1fe2,(((b2>>0)&0xf)<<1)|((b1>>4)&1)); pvc_w8(0x1fe3,(((b2>>4)&0xf)<<1)|((b1>>5)&1)); pvc_w8(0x1fe4,(((b1>>0)&0xf)<<1)|((b1>>6)&1)); pvc_w8(0x1fe5, (b1>>7)); } static void pvc_prot2( void ) // on writes to e8/e9/ea/eb { UINT8 b1, b2, b3, b4; b1 = pvc_r8(0x1fe9); b2 = pvc_r8(0x1fe8); b3 = pvc_r8(0x1feb); b4 = pvc_r8(0x1fea); pvc_w8(0x1fec,(b2>>1)|((b1>>1)<<4)); pvc_w8(0x1fed,(b4>>1)|((b2&1)<<4)|((b1&1)<<5)|((b4&1)<<6)|((b3&1)<<7)); } static void pvc_write_bankswitch( void ) { UINT32 bankaddress; bankaddress = ((pvc_cartridge_ram[0xff8]>>8)|(pvc_cartridge_ram[0xff9]<<8)); *(((UINT8 *)pvc_cartridge_ram) + BYTE_XOR_LE(0x1ff0)) = 0xa0; *(((UINT8 *)pvc_cartridge_ram) + BYTE_XOR_LE(0x1ff1)) &= 0xfe; *(((UINT8 *)pvc_cartridge_ram) + BYTE_XOR_LE(0x1ff3)) &= 0x7f; neogeo_set_main_cpu_bank_address(bankaddress+0x100000); } static READ16_HANDLER( pvc_prot_r ) { return pvc_cartridge_ram[ offset ]; } static WRITE16_HANDLER( pvc_prot_w ) { COMBINE_DATA( &pvc_cartridge_ram[ offset ] ); if (offset == 0xff0)pvc_prot1(); else if(offset >= 0xff4 && offset <= 0xff5)pvc_prot2(); else if(offset >= 0xff8)pvc_write_bankswitch(); } void install_pvc_protection( void ) { pvc_cartridge_ram = auto_malloc(0x2000); state_save_register_global_pointer(pvc_cartridge_ram, 0x2000 / 2); memory_install_readwrite16_handler(0, ADDRESS_SPACE_PROGRAM, 0x2fe000, 0x2fffff, 0, 0, pvc_prot_r, pvc_prot_w); }