I was bored, so I decided to do this:
static void do_neopvc(int game)
{
unsigned int xor1[ 2 ][ 0x20 ] = { // kof2003 does not use XOR 1
{0x3b, 0x6a, 0xf7, 0xb7, 0xe8, 0xa9, 0x20, 0x99, 0x9f, 0x39, 0x34, 0x0c, 0xc3, 0x9a, 0xa5, 0xc8,
0xb8, 0x18, 0xce, 0x56, 0x94, 0x44, 0xe3, 0x7a, 0xf7, 0xdd, 0x42, 0xf0, 0x18, 0x60, 0x92, 0x9f},
{0xc2, 0x4b, 0x74, 0xfd, 0x0b, 0x34, 0xeb, 0xd7, 0x10, 0x6d, 0xf9, 0xce, 0x5d, 0xd5, 0x61, 0x29,
0xf5, 0xbe, 0x0d, 0x82, 0x72, 0x45, 0x0f, 0x24, 0xb3, 0x34, 0x1b, 0x99, 0xea, 0x09, 0xf3, 0x03},
};
unsigned int xor2[ 3 ][ 0x20 ] = {
{0xb4, 0x0f, 0x40, 0x6c, 0x38, 0x07, 0xd0, 0x3f, 0x53, 0x08, 0x80, 0xaa, 0xbe, 0x07, 0xc0, 0xfa,
0xd0, 0x08, 0x10, 0xd2, 0xf1, 0x03, 0x70, 0x7e, 0x87, 0x0B, 0x40, 0xf6, 0x2a, 0x0a, 0xe0, 0xf9},
{0x69, 0x0b, 0x60, 0xd6, 0x4f, 0x01, 0x40, 0x1a, 0x9f, 0x0b, 0xf0, 0x75, 0x58, 0x0e, 0x60, 0xb4,
0x14, 0x04, 0x20, 0xe4, 0xb9, 0x0d, 0x10, 0x89, 0xeb, 0x07, 0x30, 0x90, 0x50, 0x0e, 0x20, 0x26},
{0x36, 0x09, 0xb0, 0x64, 0x95, 0x0f, 0x90, 0x42, 0x6e, 0x0f, 0x30, 0xf6, 0xe5, 0x08, 0x30, 0x64,
0x08, 0x04, 0x00, 0x2f, 0x72, 0x09, 0xa0, 0x13, 0xc9, 0x0b, 0xa0, 0x3e, 0xc2, 0x00, 0x40, 0x2b},
};
int i, ofst, ofst2 = 0x00300;
unsigned char *src = Neo68KROM01;
unsigned char *dst = (unsigned char*)malloc( 0x800000 );
if (game != 1)
for( i = 0; i < 0x100000; i++ )
src[ i ] ^= xor1[ game-2 ][ (i % 0x20) ];
for( i = 0x100000; i < 0x800000; i++ )
src[ i ] ^= xor2[ game-1 ][ (i % 0x20) ];
for( i = 0x100000; i < 0x800000; i += 4 ){
unsigned short *rom16 = (unsigned short*)&src[ i + 1 ];
if (game==1) *rom16 = BITSWAP16( *rom16, 15, 14, 13, 12, 4, 5, 6, 7, 8, 9, 10, 11, 3, 2, 1, 0 );
if (game!=1) *rom16 = BITSWAP16( *rom16, 15, 14, 13, 12, 10, 11, 8, 9, 6, 7, 4, 5, 3, 2, 1, 0 );
}
memcpy( dst, src, 0x800000 );
for( i = 0; i < 0x10; i++ ){
ofst = (i & 0xf0) + BITSWAP08( (i & 0x0f), 7, 6, 5, 4, 1, 0, 3, 2 );
if (game==2) ofst = (i & 0xf0) + BITSWAP08( (i & 0x0f), 7, 6, 5, 4, 2, 3, 0, 1 );
memcpy( &src[ i * 0x10000 ], &dst[ ofst * 0x10000 ], 0x10000 );
}
for( i = 0x100000; i < 0x800000; i += 0x100 ){
if (game==2) ofst2=0x00a00;
ofst = (i & 0xf000ff) + ((i & 0x000f00) ^ ofst2) + (BITSWAP08( ((i & 0x0ff000) >> 12), 4, 5, 6, 7, 1, 0, 3, 2 ) << 12);
if (game==3)
ofst = (i & 0xf000ff) + ((i & 0x000f00) ^ 0x00700) + (BITSWAP08( ((i & 0x0ff000) >> 12), 5, 4, 7, 6, 1, 0, 3, 2 ) << 12);
memcpy( &src[ i ], &dst[ ofst ], 0x100 );
}
}
Add the code above somewhere in your d_neogeo.cpp (It must be before any place you call it.)
Also, make sure you have P interleaving code in your build (the code fataku kindly posted above).
Lastly, add it to your drivers:
static void kof2003_px_decrypt()
{
interleave_pdata();
do_neopvc(1);
unsigned char *rom = Neo68KROM01;
unsigned char *buf = (unsigned char*)malloc(0x900000);
memcpy( buf, rom, 0x900000 );
memcpy( &rom[0x100000], &buf[0x800000], 0x100000 );
memcpy( &rom[0x200000], &buf[0x100000], 0x700000 );
free(buf);
}
static void svcchaos_px_decrypt()
{
do_neopvc(2);
unsigned char *rom = Neo68KROM01;
unsigned char *buf = (unsigned char*)malloc( 0x800000 );
memcpy( buf, rom, 0x800000 );
memcpy( &rom[ 0x100000 ], &buf[ 0x700000 ], 0x100000 );
memcpy( &rom[ 0x200000 ], &buf[ 0x100000 ], 0x600000 );
free( buf );
svcchaos_patch();
}
static void mslug5_px_decrypt()
{
interleave_pdata();
do_neopvc(3);
mslug5_patch();
}
Before anyone asks, kof2003 is still not working.