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Add some documentation

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taxicat1
2026-05-22 03:18:29 -04:00
parent 47b45ed8c7
commit 563cd47c99
1 changed files with 7 additions and 2 deletions
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data/patchlist.json
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@@ -364,13 +364,14 @@
// MetaFortress is an automated system that replaces the typical way DS games are built. It automatically injects
// code inside developer-written game functions that conducts checksums on other functions, including SDK functions
// and also other game functions that previously were modified with injected checksum calculations.
// These checksums work to detect the flashcart kernel patches for ROM reading, save data access, or other features.
// The checksums themselves are randomized: the way they load pointers, access data, update the checksum state,
// perform a checksum finalization, and compare the calculated result to the expected result, as well as what happens
// if the checksum fails, are all subject to a high degree of randomization that makes automated static analysis
// difficult or impossible.
//
// This is in stark contrast to DS Protect, which had no per-game randomization (except for The Legend of Zelda: Spirit Tracks)
// and required each invokation and response behavior be manually programmed in.
// and required each invocation and response behavior be manually programmed in.
//
// For example, a basic game function like this:
//
@@ -396,7 +397,7 @@
// checksum += checksum << 2;
// checksum ^= checksum >> 13;
// checksum += checksum << 5;
// if (checksum == 0xFBD4230) /* Compare checksum, correct value is often loaded off the stack */
// if (checksum == 0x1FBD4230) /* Compare checksum, correct value is often loaded off the stack */
// {
// /* Game func stuff */ /* Normal game procedure */
// }
@@ -524,6 +525,8 @@
// BIGE - Battle of Giants - Mutant Insects (USA)
// BIGP - Combat of Giants - Mutant Insects (Europe)
//
// These games also use custom ARM9 entrypoints to run a MetaFortress checksum on the ARM7 immediately.
{
"gameCode": "BIGE", // Battle of Giants - Mutant Insects (USA)
"gameVersion": 0,
@@ -985,6 +988,8 @@
// TADP - Kirby - Mass Attack (Europe)
// TADJ - Atsumete! Kirby (Japan)
// TADK - Moyeora! Kirby (Korea)
//
// These games also have DS Protect, which is patched separately (see FsStartOverlayHookPatch and DSProtectOverlayPatch).
{
"gameCode": "TADE", // Kirby - Mass Attack (USA)
"gameVersion": 0,