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GBA Memory: Clean up Vast Fame code somewhat

This commit is contained in:
Rib 2024-06-09 22:28:51 +01:00 committed by Vicki Pfau
parent 20fc7b6ef3
commit 58651f2054
3 changed files with 21 additions and 21 deletions
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8
include/mgba/internal/gba/cart/vfame.h
View File

@ -13,11 +13,13 @@
CXX_GUARD_START
#define DIGIMON_SAPPHIRE_CHINESE_CRC32 0x793A328F
enum GBAVFameCartType {
VFAME_NO = 0,
VFAME_STANDARD = 1,
VFAME_ALTERNATE = 2,
VFAME_GEORGE = 3
VFAME_GEORGE = 2,
VFAME_ALTERNATE = 3,
};
struct GBAVFameCart {
@ -29,7 +31,7 @@ struct GBAVFameCart {
};
void GBAVFameInit(struct GBAVFameCart* cart);
void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize);
void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize, uint32_t crc32);
void GBAVFameSramWrite(struct GBAVFameCart* cart, uint32_t address, uint8_t value, uint8_t* sramData);
uint32_t GBAVFameModifyRomAddress(struct GBAVFameCart* cart, uint32_t address, size_t romSize);
uint32_t GBAVFameGetPatternValue(uint32_t address, int bits);

32
src/gba/cart/vfame.c
View File

@ -7,38 +7,37 @@
#include <mgba/internal/gba/gba.h>
#include <mgba/internal/gba/memory.h>
#include <mgba-util/crc32.h>
static const uint8_t ADDRESS_REORDERING[4][16] = {
{ 15, 14, 9, 1, 8, 10, 7, 3, 5, 11, 4, 0, 13, 12, 2, 6 },
{ 15, 7, 13, 5, 11, 6, 0, 9, 12, 2, 10, 14, 3, 1, 8, 4 },
{ 15, 0, 3, 12, 2, 4, 14, 13, 1, 8, 6, 7, 9, 5, 11, 10 }
};
static const uint8_t ADDRESS_REORDERING_ALTERNATE[4][16] = {
{ 15, 0, 13, 5, 8, 4, 7, 3, 1, 2, 10, 14, 9, 12, 11, 6 },
{ 15, 7, 9, 1, 2, 6, 14, 13, 12, 11, 4, 0, 3, 5, 8, 10 },
{ 15, 14, 3, 12, 11, 10, 0, 9, 5, 8, 6, 7, 13, 1, 2, 4 }
};
static const uint8_t ADDRESS_REORDERING_GEORGE[4][16] = {
{ 15, 7, 13, 1, 11, 10, 14, 9, 12, 2, 4, 0, 3, 5, 8, 6 },
{ 15, 14, 3, 12, 8, 4, 0, 13, 5, 11, 6, 7, 9, 1, 2, 10 },
{ 15, 0, 9, 5, 2, 6, 7, 3, 1, 8, 10, 14, 13, 12, 11, 4 }
};
static const uint8_t ADDRESS_REORDERING_ALTERNATE[4][16] = {
{ 15, 0, 13, 5, 8, 4, 7, 3, 1, 2, 10, 14, 9, 12, 11, 6 },
{ 15, 7, 9, 1, 2, 6, 14, 13, 12, 11, 4, 0, 3, 5, 8, 10 },
{ 15, 14, 3, 12, 11, 10, 0, 9, 5, 8, 6, 7, 13, 1, 2, 4 }
};
static const uint8_t VALUE_REORDERING[4][16] = {
{ 5, 4, 3, 2, 1, 0, 7, 6 },
{ 3, 2, 1, 0, 7, 6, 5, 4 },
{ 1, 0, 7, 6, 5, 4, 3, 2 }
};
static const uint8_t VALUE_REORDERING_ALTERNATE[4][16] = {
{ 5, 4, 7, 2, 1, 0, 3, 6 },
{ 1, 2, 3, 0, 5, 6, 7, 4 },
{ 3, 0, 1, 6, 7, 4, 5, 2 }
};
static const uint8_t VALUE_REORDERING_GEORGE[4][16] = {
{ 3, 0, 7, 2, 1, 4, 5, 6 },
{ 1, 4, 3, 0, 5, 6, 7, 2 },
{ 5, 2, 1, 6, 7, 0, 3, 4 }
};
static const uint8_t VALUE_REORDERING_ALTERNATE[4][16] = {
{ 5, 4, 7, 2, 1, 0, 3, 6 },
{ 1, 2, 3, 0, 5, 6, 7, 4 },
{ 3, 0, 1, 6, 7, 4, 5, 2 }
};
static const int8_t MODE_CHANGE_START_SEQUENCE[5] = { 0x99, 0x02, 0x05, 0x02, 0x03 };
static const int8_t MODE_CHANGE_END_SEQUENCE[5] = { 0x99, 0x03, 0x62, 0x02, 0x56 };
@ -60,7 +59,7 @@ void GBAVFameInit(struct GBAVFameCart* cart) {
cart->acceptingModeChange = false;
}
void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize) {
void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize, uint32_t crc32) {
cart->cartType = VFAME_NO;
// The initialisation code is also present & run in the dumps of Digimon Ruby & Sapphire from hacked/deprotected reprint carts,
@ -82,11 +81,10 @@ void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize) {
if (memcmp("George Sango", &((struct GBACartridge*) rom)->title, 12) == 0) {
cart->cartType = VFAME_GEORGE;
mLOG(GBA_MEM, INFO, "George mode");
}
// Chinese version of Digimon Sapphire; header is identical to the English version which uses the normal reordering
// so we have to use some other way to detect it
else if (doCrc32(rom, romSize) == 0x793A328F) {
cart->cartType = VFAME_STANDARD;
} else if (crc32 == DIGIMON_SAPPHIRE_CHINESE_CRC32) {
// Chinese version of Digimon Sapphire; header is identical to the English version which uses the normal reordering
// so we have to use some other way to detect it
cart->cartType = VFAME_ALTERNATE;
}
}

2
src/gba/gba.c
View File

@ -493,7 +493,7 @@ bool GBALoadROM(struct GBA* gba, struct VFile* vf) {
gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
}
GBAHardwareInit(&gba->memory.hw, &((uint16_t*) gba->memory.rom)[GPIO_REG_DATA >> 1]);
GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize);
GBAVFameDetect(&gba->memory.vfame, gba->memory.rom, gba->memory.romSize, gba->romCrc32);
// TODO: error check
return true;
}