oh,everyone! this code maybe help you:
// Code by iq_132 -- http://neosource.1emu.net/
static void interleave_pdata()
{
int i, j=0;
UINT8 *src = Neo68KROM01;
UINT8 *dst = (UINT8 *)malloc(0x800000);
for (i=0;i<0x800000;i=i+4){
dst[i+0]=src[j];
dst[i+1]=src[j+1];
dst[i+2]=src[j+0x400000];
dst[i+3]=src[j+0x400001];
j=j+2;
}
memcpy(Neo68KROM01,dst,0x800000);
free(dst);
}
// Neo-PVC Code for PCB and MVS games with this protection
// Original code by(?) HalRIN -- http://www52.tok2.com/home/foge/
static void do_neopvc(int game)
{
unsigned int xor1[ 2 ][ 0x20 ] = { // kof2003 does not use xor1
// for svcchaos
{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},
// for mslug5
{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 ] = {
// for kof2003
{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},
// for svcchaos
{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},
// for mslug5
{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, rom_size = 0x800000;
unsigned char *rom = Neo68KROM01;
unsigned char *buf = (unsigned char*)malloc( rom_size );
if (game!=1)
for( i = 0; i < 0x100000; i++ )
rom[ i ] ^= xor1[ game-2 ][ (i % 0x20) ];
for( i = 0x100000; i < 0x800000; i++ )
rom[ i ] ^= xor2[ game-1 ][ (i % 0x20) ];
for( i = 0x100000; i < 0x800000; i += 4 ){
unsigned short *rom16 = (unsigned short *)&rom[ 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( buf, rom, rom_size );
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( &rom[ i * 0x10000 ], &buf[ 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( &rom[ i ], &buf[ ofst ], 0x100 );
}
if (game==1) {
buf = (unsigned char*)malloc( 0x900000 );
memcpy( buf, rom, 0x900000 );
memcpy( &rom[ 0x100000 ], &buf[ 0x800000 ], 0x100000 );
memcpy( &rom[ 0x200000 ], &buf[ 0x100000 ], 0x700000 );
} else {
memcpy( buf, rom, rom_size );
memcpy( &rom[ 0x100000 ], &buf[ 0x700000 ], 0x100000 );
memcpy( &rom[ 0x200000 ], &buf[ 0x100000 ], 0x600000 );
}
free(buf);
}