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GBA Memory: Support the Chinese version of Digimon Sapphire by Vast Fame

This commit is contained in:
Rib 2024-06-09 22:28:51 +01:00 committed by Vicki Pfau
parent e16dfc264a
commit 20fc7b6ef3
2 changed files with 24 additions and 3 deletions
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3
include/mgba/internal/gba/cart/vfame.h
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@ -16,7 +16,8 @@ CXX_GUARD_START
enum GBAVFameCartType {
VFAME_NO = 0,
VFAME_STANDARD = 1,
VFAME_GEORGE = 2
VFAME_ALTERNATE = 2,
VFAME_GEORGE = 3
};
struct GBAVFameCart {

24
src/gba/cart/vfame.c
View File

@ -7,12 +7,18 @@
#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 },
@ -23,6 +29,11 @@ static const uint8_t VALUE_REORDERING[4][16] = {
{ 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 },
@ -65,13 +76,18 @@ void GBAVFameDetect(struct GBAVFameCart* cart, uint32_t* rom, size_t romSize) {
mLOG(GBA_MEM, INFO, "Vast Fame game detected");
}
// This game additionally operates with a different set of SRAM modes
// Its initialisation seems to be identical so the difference must be in the cart HW itself
// These games additionally operates with a different set of SRAM modes
// Their initialisation seems to be identical so the difference must be in the cart HW itself
// Other undumped games may have similar differences
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;
}
}
// This is not currently being used but would be called on ROM reads
@ -256,6 +272,8 @@ static uint32_t _modifySramAddress(enum GBAVFameCartType type, uint32_t address,
return address;
} else if (type == VFAME_GEORGE) {
return _reorderBits(address, ADDRESS_REORDERING_GEORGE[mode - 1], 16);
} else if (type == VFAME_ALTERNATE) {
return _reorderBits(address, ADDRESS_REORDERING_ALTERNATE[mode - 1], 16);
} else {
return _reorderBits(address, ADDRESS_REORDERING[mode - 1], 16);
}
@ -266,6 +284,8 @@ static int8_t _modifySramValue(enum GBAVFameCartType type, uint8_t value, int mo
if (reorderType != 0) {
if (type == VFAME_GEORGE) {
value = _reorderBits(value, VALUE_REORDERING_GEORGE[reorderType - 1], 8);
} else if (type == VFAME_ALTERNATE) {
value = _reorderBits(value, VALUE_REORDERING_ALTERNATE[reorderType - 1], 8);
} else {
value = _reorderBits(value, VALUE_REORDERING[reorderType - 1], 8);
}