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Add debug menu entry to inject Celebi (WIP)

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Philippe Symons
2026-03-25 21:49:41 +01:00
parent 029a5a4cda
commit 2982b9ba93
11 changed files with 352 additions and 15 deletions
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12
source/flash_mem.cpp
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@@ -123,18 +123,18 @@ void reverse_endian(u8 *data, size_t size)
}
}
void update_memory_buffer_checksum(bool hall_of_fame)
void update_memory_buffer_checksum(u8 *sector_buffer, bool hall_of_fame)
{
u32 checksum = 0x00;
// Section 13 is the last PC buffer (I) and that one only has 2000 bytes of data.
// source: https://bulbapedia.bulbagarden.net/wiki/Save_data_structure_(Generation_III)#Section_ID
const u32 num_of_bytes = (global_memory_buffer[SECTION_ID_OFFSET] != 13) ? 3968 : 2000;
const u32 num_of_bytes = (sector_buffer[SECTION_ID_OFFSET] != 13) ? 3968 : 2000;
// the cpu is little endian and the data is read as little endian too.
// therefore, we can do a straightforward sum of the data as u32's.
const u32 *cur = (const u32 *)global_memory_buffer;
const u32 * const end = (const u32 *)(global_memory_buffer + num_of_bytes);
const u32 *cur = (const u32 *)sector_buffer;
const u32 * const end = (const u32 *)(sector_buffer + num_of_bytes);
while (cur < end)
{
checksum += *cur;
@@ -144,8 +144,8 @@ void update_memory_buffer_checksum(bool hall_of_fame)
const u16 small_checksum = ((checksum & 0xFFFF0000) >> 16) + (checksum & 0x0000FFFF);
const u32 checksum_offset = hall_of_fame ? 0x0FF4 : 0x0FF6;
global_memory_buffer[checksum_offset] = small_checksum & 0x00FF;
global_memory_buffer[checksum_offset + 1] = (small_checksum & 0xFF00) >> 8;
sector_buffer[checksum_offset] = small_checksum & 0x00FF;
sector_buffer[checksum_offset + 1] = (small_checksum & 0xFF00) >> 8;
}