Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-23 00:39:36 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

fixed kf2k3pcb decrypt, the checksum (used to generate the key) must be calculated BEFORE the additional bitswap is applied.

Browse Source
This commit is contained in:
davidhay 2008-09-20 20:34:22 +00:00
parent 41e49963f0
commit ff996589e3
2 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/mame/drivers/neodrvr.c
View File

@ -7160,18 +7160,20 @@ static DRIVER_INIT( kf2k3pcb )
kf2k3pcb_gfx_decrypt(machine);
kof2003biosdecode(machine);
/* extra little swap on the m1 */
neogeo_cmc50_m1_decrypt(machine);
/* extra little swap on the m1 - this must be performed AFTER the m1 decrypt
or the m1 checksum (used to generate the key) for decrypting the m1 is
incorrect */
{
int i;
UINT8* rom = memory_region(machine, "audiocrypt");
for (i=0;i<0x80000;i++)
UINT8* rom = memory_region(machine, "audio");
for (i=0;i<0x90000;i++)
{
rom[i] = BITSWAP8(rom[i], 5, 6, 1, 4, 3, 0, 7, 2);
}
}
neogeo_cmc50_m1_decrypt(machine);
kof2000_neogeo_gfx_decrypt(machine, 0x9d);
kf2k3pcb_decrypt_s1data(machine);

3
src/mame/machine/neocrypt.c
View File

@ -1503,8 +1503,7 @@ void neogeo_cmc50_m1_decrypt(running_machine *machine)
UINT16 cs16=generate_cs16(rom,0x10000);
UINT16 key = BITSWAP16(cs16,12,0,2,4,8,15,7,13,10,1,3,6,11,9,14,5)^0xffff;
/* HACK! -- something is wrong in kf2k3pcb, is the m1 bad? */
if (!strcmp(machine->gamedrv->name,"kf2k3pcb")) key = 0x4b64;
//printf("key %04x\n",key);
for (i=0; i<rom_size; i++)
{