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feversoc gfx decryption

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This commit is contained in:
Nicola Salmoria 2009-02-08 21:08:31 +00:00
parent 4ee1c70057
commit 48a02562a4
4 changed files with 42 additions and 8 deletions
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4
src/mame/drivers/feversoc.c
View File

@ -336,9 +336,7 @@ ROM_END
static DRIVER_INIT( feversoc )
{
// seibuspi_text_decrypt(memory_region(machine, "gfx1"));
// seibuspi_bg_decrypt(memory_region(machine, "gfx2"), memory_region_length(machine, "gfx2"));
seibuspi_rise11_sprite_decrypt(memory_region(machine, "gfx1"), 0x200000); //WRONG!
seibuspi_rise11_sprite_decrypt_feversoc(memory_region(machine, "gfx1"), 0x200000);
}
GAME( 2000, feversoc, 0, feversoc, feversoc, feversoc, ROT0, "Seibu", "Fever Soccer", GAME_IMPERFECT_GRAPHICS | GAME_NOT_WORKING )

2
src/mame/drivers/seibuspi.c
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@ -2037,7 +2037,7 @@ static DRIVER_INIT( rfjet )
memory_install_read32_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x002894c, 0x002894f, 0, 0, rfjet_speedup_r );
seibuspi_rise11_text_decrypt(memory_region(machine, "gfx1"));
seibuspi_rise11_bg_decrypt(memory_region(machine, "gfx2"), memory_region_length(machine, "gfx2"));
seibuspi_rise11_sprite_decrypt(memory_region(machine, "gfx3"), 0x800000);
seibuspi_rise11_sprite_decrypt_rfjet(memory_region(machine, "gfx3"), 0x800000);
memory_install_write32_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0x560, 0x563, 0, 0, sprite_dma_start_w);
}

3
src/mame/includes/seibuspi.h
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@ -19,7 +19,8 @@ void seibuspi_rise10_sprite_decrypt(UINT8 *rom, int romsize);
void seibuspi_rise11_text_decrypt(UINT8 *rom);
void seibuspi_rise11_bg_decrypt(UINT8 *rom, int size);
void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int romsize);
void seibuspi_rise11_sprite_decrypt_rfjet(UINT8 *rom, int romsize);
void seibuspi_rise11_sprite_decrypt_feversoc(UINT8 *rom, int romsize);
/*----------- defined in video/seibuspi.c -----------*/

41
src/mame/machine/seibuspi.c
View File

@ -303,10 +303,31 @@ cpu #0 (PC=002C40F9): unmapped program memory dword write to 0000054C = 00000300
plane543 = partial_carry_sum24( plane543, 0x01cb64, 0x01aadd ) ^ 0x016a4c;
plane210 = partial_carry_sum24( plane210, i, 0xd6375b ) ^ 0x8bf23b;
feversoc
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = D5A90000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 4EB50000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9A4A0000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = ADB30000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = E9320000 & FFFF0000 //
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 9DF50000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 99E90000 & FFFF0000 //
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = B2590000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 961D0000 & FFFF0000 //
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 8B970000 & FFFF0000 //
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = EAAE0000 & FFFF0000
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = D5AC0000 & FFFF0000 //
CPU 'main' (PC=00021C74): unmapped program memory dword write to 0601004C = 03000000 & FFFF0000
plane543 = partial_carry_sum24( plane543, 0x18f5b2, 0x18e999 ) ^ 0x3032e9;
plane210 = partial_carry_sum24( plane210, i, 0x968bd5 ) ^ 0x1d97ac;
plane210 = partial_carry_sum24( plane210, 1, 0x000001 );
******************************************************************************************/
void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size)
void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size,
UINT32 k1, UINT32 k2, UINT32 k3, UINT32 k4, UINT32 k5, int feversoc_kludge)
{
int i;
@ -369,8 +390,10 @@ void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size)
(BIT(b1, 5)<<22) |
(BIT(b3,15)<<23);
plane543 = partial_carry_sum24( plane543, 0x01cb64, 0x01aadd ) ^ 0x016a4c;
plane210 = partial_carry_sum24( plane210, i, 0xd6375b ) ^ 0x8bf23b;
plane543 = partial_carry_sum24( plane543, k1, k2 ) ^ k3;
plane210 = partial_carry_sum24( plane210, i, k4 ) ^ k5;
if (feversoc_kludge)
plane210 = partial_carry_sum24( plane210, 1, 0x000001 );
rom[0*size+2*i] = plane543 >> 16;
rom[0*size+2*i+1] = plane543 >> 8;
@ -387,3 +410,15 @@ void seibuspi_rise11_sprite_decrypt(UINT8 *rom, int size)
sprite_reorder(&rom[2*size+2*i]);
}
}
void seibuspi_rise11_sprite_decrypt_rfjet(UINT8 *rom, int size)
{
seibuspi_rise11_sprite_decrypt(rom, size, 0x01cb64, 0x01aadd, 0x016a4c, 0xd6375b, 0x8bf23b, 0);
}
void seibuspi_rise11_sprite_decrypt_feversoc(UINT8 *rom, int size)
{
seibuspi_rise11_sprite_decrypt(rom, size, 0x18f5b2, 0x18e999, 0x3032e9, 0x968bd5, 0x1d97ac, 1);
}