Leahnaya/GBA_MultiMenu
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Lesserkuma
2023-07-31 14:10:20 +02:00
parent 34b1b4b8dc
commit a33f0ed9db
6 changed files with 87 additions and 41 deletions
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38
source/flash.c
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@@ -216,16 +216,20 @@ IWRAM_CODE u8 BootGame(ItemConfig config, FlashStatus status)
return 1;
// Temporarily store SRAM values at mapper registers
sram_register_backup[0] = *(vu8 *)MAPPER_CONFIG1;
sram_register_backup[1] = *(vu8 *)MAPPER_CONFIG2;
sram_register_backup[2] = *(vu8 *)MAPPER_CONFIG3;
sram_register_backup[3] = *(vu8 *)MAPPER_CONFIG4;
if (status.last_boot_save_type == SRAM_NONE)
{
sram_register_backup[0] = *(vu8 *)MAPPER_CONFIG1;
sram_register_backup[1] = *(vu8 *)MAPPER_CONFIG2;
sram_register_backup[2] = *(vu8 *)MAPPER_CONFIG3;
sram_register_backup[3] = *(vu8 *)MAPPER_CONFIG4;
}
// Enable SRAM access
*(vu8 *)MAPPER_CONFIG4 = 1;
// Write previous SRAM to flash
if (status.battery_present) {
if (status.battery_present)
{
if (status.last_boot_save_type != SRAM_NONE)
{
for (int i = 0; i < SRAM_SIZE; i++)
@@ -279,7 +283,7 @@ IWRAM_CODE u8 BootGame(ItemConfig config, FlashStatus status)
*(vu8 *)MAPPER_CONFIG3 = 0x40 - config.rom_size; // accessible ROM size (in 512 KB blocks)
// Wait until menu ROM is no longer visible
u16 timeout = 0xFFFF;
u32 timeout = 0x2FFF;
while (((vu16 *)AGB_ROM)[0x58] == 0x4B4C)
{
if (!timeout--)
@@ -294,16 +298,20 @@ IWRAM_CODE u8 BootGame(ItemConfig config, FlashStatus status)
// Lock mapper
*(vu8 *)MAPPER_CONFIG2 |= 0x80;
// Restore SRAM values at mapper registers
*(vu8 *)MAPPER_CONFIG1 = sram_register_backup[0];
*(vu8 *)MAPPER_CONFIG2 = sram_register_backup[1];
*(vu8 *)MAPPER_CONFIG3 = sram_register_backup[2];
*(vu8 *)MAPPER_CONFIG4 = sram_register_backup[3];
// Write buffer to SRAM
for (int i = 0; i < SRAM_SIZE; i++)
if (config.save_type != SRAM_NONE)
{
((vu8 *)AGB_SRAM)[i] = data_buffer[i];
for (int i = 0; i < SRAM_SIZE; i++)
{
((vu8 *)AGB_SRAM)[i] = data_buffer[i];
}
}
else
{
*(vu8 *)MAPPER_CONFIG1 = sram_register_backup[0];
*(vu8 *)MAPPER_CONFIG2 = sram_register_backup[1];
*(vu8 *)MAPPER_CONFIG3 = sram_register_backup[2];
*(vu8 *)MAPPER_CONFIG4 = sram_register_backup[3];
}
// Clear palette
@@ -313,7 +321,7 @@ IWRAM_CODE u8 BootGame(ItemConfig config, FlashStatus status)
}
REG_BLDY = 0;
// Soft Reset system call
// Boot ROM
__asm("swi 0"); // Soft reset
return 3;