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Kraid_Shot_Mouth: The real game doesn't preserve R18

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This commit is contained in:
Snesrev
2023-04-04 03:28:43 +02:00
parent bdad5fcf02
commit e44c3483be
2 changed files with 13 additions and 1 deletions
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11
src/sm_cpu_infra.c
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@@ -369,6 +369,10 @@ uint32 PatchBugs(uint32 mode, uint32 addr) {
// ProcessEnemyPowerBombInteraction - R18 may get overwritten by the enemy death routine
REMOVED_R18 = HIBYTE(power_bomb_explosion_radius);
REMOVED_R20 = (REMOVED_R18 + (REMOVED_R18 >> 1)) >> 1;
} else if (FixBugHook(0xA7B049)) {
// Kraid_Shot_Mouth: The real game doesn't preserve R18, R20 so they're junk at this point.
// Force getting out of the loop.
g_cpu->x = 0;
}
return 0;
@@ -825,9 +829,14 @@ Snes *SnesInit(const char *filename) {
{ uint8 t[] = { 0xa5, 0x25 }; PatchBytes(0x91C234, t, sizeof(t)); } // Bugfix in XrayHdmaFunc_BeamAimedUUL
// Remove call to InitializeMiniMapBroken
// Remove call to InitializeMiniMapBroken
{ uint8 t[] = { 0x18, 0x18, 0x18, 0x18 }; PatchBytes(0x809AF3, t, sizeof(t)); } // callf InitializeMiniMapBroken
// NormalEnemyShotAiSkipDeathAnim_CurEnemy version that preserves R18 etc.
{ uint8 t[] = { 0xA5, 0x12, 0x48, 0xA5, 0x14, 0x48, 0xA5, 0x16, 0x48, 0x22, 0xA7, 0xA6, 0xA0, 0x68, 0x85, 0x16, 0x68, 0x85, 0x14, 0x68, 0x85, 0x12, 0x6B }; PatchBytes(0xA7FF82, t, sizeof(t)); }
{ uint8 t[] = { 0x22, 0x82, 0xff, 0xa7 }; PatchBytes(0xa7b03a, t, sizeof(t)); }
RtlUpdateSnesPatchForBugfix();
for (size_t i = 0; i != arraysize(kPatchedCarrys); i++) {