Leahnaya/pokediamond
1
0
Fork 0
mirror of https://github.com/pret/pokediamond.git synced 2026-10-01 21:07:01 -05:00
Code Issues Actions Packages Projects Releases Wiki Activity

Better structure for unk_02022450

Browse Source
This commit is contained in:
PikalaxALT
2021-09-05 11:57:22 -04:00
parent 9449d61269
commit 0d9bae230d
2 changed files with 67 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
arm9/lib/NitroSDK/include/CARD_rom.h
View File

@@ -35,6 +35,44 @@ typedef struct
}
CARDRomRegion;
typedef struct CARDRomHeader
{
char game_name[12];
u32 game_code;
u16 maker_code;
u8 product_id;
u8 device_type;
u8 device_size;
u8 reserved_A[9];
u8 game_version;
u8 property;
void *main_rom_offset;
void *main_entry_address;
void *main_ram_address;
u32 main_size;
void *sub_rom_offset;
void *sub_entry_address;
void *sub_ram_address;
u32 sub_size;
CARDRomRegion fnt;
CARDRomRegion fat;
CARDRomRegion main_ovt;
CARDRomRegion sub_ovt;
u8 rom_param_A[8];
u32 banner_offset;
u16 secure_crc;
u8 rom_param_B[2];
void *main_autoload_done;
void *sub_autoload_done;
u8 rom_param_C[8];
u32 rom_size;
u32 header_size;
u8 reserved_B[0x38];
u8 logo_data[0x9C];
u16 logo_crc;
u16 header_crc;
} CARDRomHeader;
typedef struct CARDRomStat
{
void (*read_func) (struct CARDRomStat *);

41
arm9/src/unk_02022450.c
View File

@@ -6,35 +6,52 @@
#include "unk_02022450.h"
static const char string_saying_rom[] = "rom";
static inline u32 GetBakRomCode(void) {
return ((CARDRomHeader*)HW_MAIN_MEM_SHARED)->game_code;
}
static inline void SetBakRomCode(u32 newCode) {
((CARDRomHeader*)HW_MAIN_MEM_SHARED)->game_code = newCode;
}
static inline u16 GetBakRomMaker(void) {
return ((CARDRomHeader*)HW_MAIN_MEM_SHARED)->maker_code;
}
static const char arc_name[] = "rom";
// Multichar constants are encoded big-endian,
// but this is a little-endian machine.
#define ROM_CODE_ADAJ_BE 'JADA'
#define MAKER_CODE_01_BE '01'
/*Replacing (HW_MAIN_MEM_SHARED + 0xC) or (HW_MAIN_MEM_SHARED + 0x10) or defining ADAJ or 01 constants causes match failure*/
THUMB_FUNC void FUN_02022450 () {
THUMB_FUNC void FUN_02022450() {
if (!FS_IsAvailable()) {
OS_Terminate();
}
else {
struct CARD_Header* card_header_buffer = (struct CARD_Header*)HW_MAIN_MEM_SHARED;
CARDRomHeader* card_header_buffer = (CARDRomHeader*)HW_MAIN_MEM_SHARED;
if (!*(u32*)(HW_MAIN_MEM_SHARED + 0xC)) {
if (GetBakRomCode() == 0) {
CARD_Init();
MI_CpuCopy8((u8*)HW_ROM_HEADER_BUF, (u8*)card_header_buffer, HW_CARD_ROM_HEADER_SIZE);
MI_CpuCopy8((u8*)HW_ROM_HEADER_BUF, (u8*)HW_CARD_ROM_HEADER, HW_CARD_ROM_HEADER_SIZE);
*(u32*)(HW_MAIN_MEM_SHARED + 0xC) = 0x4A414441 /*"ADAJ" LE*/;
SetBakRomCode(ROM_CODE_ADAJ_BE);
}
FSArchive * const r0 = FS_FindArchive(string_saying_rom, 3);
r0->fat = card_header_buffer->header_48;
r0->fat_size = card_header_buffer->header_4C;
r0->fnt = card_header_buffer->header_40;
r0->fnt_size = card_header_buffer->header_44;
if (*(u32*)(HW_MAIN_MEM_SHARED + 0xC) != 0x4A414441 /*"ADAJ" LE*/ || *(u16*)(HW_MAIN_MEM_SHARED + 0x10) != 0x3130 /*"01" LE*/) {
FSArchive * const r0 = FS_FindArchive(arc_name, 3);
r0->fat = card_header_buffer->fat.offset;
r0->fat_size = card_header_buffer->fat.length;
r0->fnt = card_header_buffer->fnt.offset;
r0->fnt_size = card_header_buffer->fnt.length;
if (GetBakRomCode() != ROM_CODE_ADAJ_BE || GetBakRomMaker() != MAKER_CODE_01_BE) {
OS_Terminate();
}
}
return;
}
THUMB_FUNC void Reset_To_File (const char* path) {
THUMB_FUNC void Reset_To_File(const char* path) {
FSFile file;
FS_InitFile(&file);
if (FS_OpenFile(&file, path)) {