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GBA: Add GameShark reseeding

This commit is contained in:
Jeffrey Pfau 2015-02-08 01:26:56 -08:00
parent d2a21c256b
commit 2b92eab1b2
1 changed files with 53 additions and 2 deletions
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55
src/gba/cheats.c
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@ -15,6 +15,44 @@ DEFINE_VECTOR(GBACheatList, struct GBACheat);
static const uint32_t _gsa1S[4] = { 0x09F4FBBD, 0x9681884A, 0x352027E9, 0xF3DEE5A7 };
static const uint32_t _gsa3S[4] = { 0x7AA9648F, 0x7FAE6994, 0xC0EFAAD5, 0x42712C57 };
static const uint8_t _gsa1T1[256] = {
0x31, 0x1C, 0x23, 0xE5, 0x89, 0x8E, 0xA1, 0x37, 0x74, 0x6D, 0x67, 0xFC, 0x1F, 0xC0, 0xB1, 0x94,
0x3B, 0x05, 0x56, 0x86, 0x00, 0x24, 0xF0, 0x17, 0x72, 0xA2, 0x3D, 0x1B, 0xE3, 0x17, 0xC5, 0x0B,
0xB9, 0xE2, 0xBD, 0x58, 0x71, 0x1B, 0x2C, 0xFF, 0xE4, 0xC9, 0x4C, 0x5E, 0xC9, 0x55, 0x33, 0x45,
0x7C, 0x3F, 0xB2, 0x51, 0xFE, 0x10, 0x7E, 0x75, 0x3C, 0x90, 0x8D, 0xDA, 0x94, 0x38, 0xC3, 0xE9,
0x95, 0xEA, 0xCE, 0xA6, 0x06, 0xE0, 0x4F, 0x3F, 0x2A, 0xE3, 0x3A, 0xE4, 0x43, 0xBD, 0x7F, 0xDA,
0x55, 0xF0, 0xEA, 0xCB, 0x2C, 0xA8, 0x47, 0x61, 0xA0, 0xEF, 0xCB, 0x13, 0x18, 0x20, 0xAF, 0x3E,
0x4D, 0x9E, 0x1E, 0x77, 0x51, 0xC5, 0x51, 0x20, 0xCF, 0x21, 0xF9, 0x39, 0x94, 0xDE, 0xDD, 0x79,
0x4E, 0x80, 0xC4, 0x9D, 0x94, 0xD5, 0x95, 0x01, 0x27, 0x27, 0xBD, 0x6D, 0x78, 0xB5, 0xD1, 0x31,
0x6A, 0x65, 0x74, 0x74, 0x58, 0xB3, 0x7C, 0xC9, 0x5A, 0xED, 0x50, 0x03, 0xC4, 0xA2, 0x94, 0x4B,
0xF0, 0x58, 0x09, 0x6F, 0x3E, 0x7D, 0xAE, 0x7D, 0x58, 0xA0, 0x2C, 0x91, 0xBB, 0xE1, 0x70, 0xEB,
0x73, 0xA6, 0x9A, 0x44, 0x25, 0x90, 0x16, 0x62, 0x53, 0xAE, 0x08, 0xEB, 0xDC, 0xF0, 0xEE, 0x77,
0xC2, 0xDE, 0x81, 0xE8, 0x30, 0x89, 0xDB, 0xFE, 0xBC, 0xC2, 0xDF, 0x26, 0xE9, 0x8B, 0xD6, 0x93,
0xF0, 0xCB, 0x56, 0x90, 0xC0, 0x46, 0x68, 0x15, 0x43, 0xCB, 0xE9, 0x98, 0xE3, 0xAF, 0x31, 0x25,
0x4D, 0x7B, 0xF3, 0xB1, 0x74, 0xE2, 0x64, 0xAC, 0xD9, 0xF6, 0xA0, 0xD5, 0x0B, 0x9B, 0x49, 0x52,
0x69, 0x3B, 0x71, 0x00, 0x2F, 0xBB, 0xBA, 0x08, 0xB1, 0xAE, 0xBB, 0xB3, 0xE1, 0xC9, 0xA6, 0x7F,
0x17, 0x97, 0x28, 0x72, 0x12, 0x6E, 0x91, 0xAE, 0x3A, 0xA2, 0x35, 0x46, 0x27, 0xF8, 0x12, 0x50
};
static const uint8_t _gsa1T2[256] = {
0xD8, 0x65, 0x04, 0xC2, 0x65, 0xD5, 0xB0, 0x0C, 0xDF, 0x9D, 0xF0, 0xC3, 0x9A, 0x17, 0xC9, 0xA6,
0xE1, 0xAC, 0x0D, 0x14, 0x2F, 0x3C, 0x2C, 0x87, 0xA2, 0xBF, 0x4D, 0x5F, 0xAC, 0x2D, 0x9D, 0xE1,
0x0C, 0x9C, 0xE7, 0x7F, 0xFC, 0xA8, 0x66, 0x59, 0xAC, 0x18, 0xD7, 0x05, 0xF0, 0xBF, 0xD1, 0x8B,
0x35, 0x9F, 0x59, 0xB4, 0xBA, 0x55, 0xB2, 0x85, 0xFD, 0xB1, 0x72, 0x06, 0x73, 0xA4, 0xDB, 0x48,
0x7B, 0x5F, 0x67, 0xA5, 0x95, 0xB9, 0xA5, 0x4A, 0xCF, 0xD1, 0x44, 0xF3, 0x81, 0xF5, 0x6D, 0xF6,
0x3A, 0xC3, 0x57, 0x83, 0xFA, 0x8E, 0x15, 0x2A, 0xA2, 0x04, 0xB2, 0x9D, 0xA8, 0x0D, 0x7F, 0xB8,
0x0F, 0xF6, 0xAC, 0xBE, 0x97, 0xCE, 0x16, 0xE6, 0x31, 0x10, 0x60, 0x16, 0xB5, 0x83, 0x45, 0xEE,
0xD7, 0x5F, 0x2C, 0x08, 0x58, 0xB1, 0xFD, 0x7E, 0x79, 0x00, 0x34, 0xAD, 0xB5, 0x31, 0x34, 0x39,
0xAF, 0xA8, 0xDD, 0x52, 0x6A, 0xB0, 0x60, 0x35, 0xB8, 0x1D, 0x52, 0xF5, 0xF5, 0x30, 0x00, 0x7B,
0xF4, 0xBA, 0x03, 0xCB, 0x3A, 0x84, 0x14, 0x8A, 0x6A, 0xEF, 0x21, 0xBD, 0x01, 0xD8, 0xA0, 0xD4,
0x43, 0xBE, 0x23, 0xE7, 0x76, 0x27, 0x2C, 0x3F, 0x4D, 0x3F, 0x43, 0x18, 0xA7, 0xC3, 0x47, 0xA5,
0x7A, 0x1D, 0x02, 0x55, 0x09, 0xD1, 0xFF, 0x55, 0x5E, 0x17, 0xA0, 0x56, 0xF4, 0xC9, 0x6B, 0x90,
0xB4, 0x80, 0xA5, 0x07, 0x22, 0xFB, 0x22, 0x0D, 0xD9, 0xC0, 0x5B, 0x08, 0x35, 0x05, 0xC1, 0x75,
0x4F, 0xD0, 0x51, 0x2D, 0x2E, 0x5E, 0x69, 0xE7, 0x3B, 0xC2, 0xDA, 0xFF, 0xF6, 0xCE, 0x3E, 0x76,
0xE8, 0x36, 0x8C, 0x39, 0xD8, 0xF3, 0xE9, 0xA6, 0x42, 0xE6, 0xC1, 0x4C, 0x05, 0xBE, 0x17, 0xF2,
0x5C, 0x1B, 0x19, 0xDB, 0x0F, 0xF3, 0xF8, 0x49, 0xEB, 0x36, 0xF6, 0x40, 0x6F, 0xAD, 0xC1, 0x8C
};
static int32_t _readMem(struct ARMCore* cpu, uint32_t address, int width) {
switch (width) {
case 1:
@ -119,6 +157,19 @@ static void _decryptGameShark(uint32_t* op1, uint32_t* op2, const uint32_t* seed
}
}
static void _reseedGameShark(uint32_t* seeds, uint16_t params, const uint8_t* t1, const uint8_t* t2) {
int x, y;
int s0 = params >> 8;
int s1 = params & 0xFF;
for (y = 0; y < 4; ++y) {
for (x = 0; x < 4; ++x) {
uint8_t z = t1[(s0 + x) & 0xFF] + t2[(s1 + y) & 0xFF];
seeds[y] <<= 8;
seeds[y] |= z;
}
}
}
static bool _addGSA1(struct GBACheatSet* cheats, uint32_t op1, uint32_t op2) {
enum GBAGameSharkType type = op1 >> 28;
struct GBACheat* cheat = 0;
@ -189,8 +240,8 @@ static bool _addGSA1(struct GBACheatSet* cheats, uint32_t op1, uint32_t op2) {
return false;
case GSA_IF_EQ:
if (op1 == 0xDEADFACE) {
// TODO: Change seeds
return false;
_reseedGameShark(cheats->gsaSeeds, op2, _gsa1T1, _gsa1T2);
return true;
}
cheat = GBACheatListAppend(&cheats->list);
cheat->type = CHEAT_IF_EQ;