Brain Memory Training Academy

Base game 1.0.0 (v0), SDK 16.2.4. Unity 2022.3.5f1 IL2CPP with FMOD on NVN. Modules main, subsdk0 (the movie module) and sdk; the sdk is Unicorn Overlord 1.05's build (010069401ADB8000). Plays on the iPhone. On the Mac: the title, the controls screen, the level select and the levels with their Level Complete / Level Failed screens, at 60 fps with real sound and saves, no red line; about 0.75 GB resident, flat over 20 minutes.

What it needs

Memory

• The NPDM declares 16 MB of system resource, so IsVirtualAddressMemoryEnabled is true: nninitStartup (main+0x73ad60) hands application pool − used memory to StandardAllocator as virtual address memory and never calls SetMemoryHeapSize, as in Ace Attorney Investigations Collection.
• Resolved: an nn::diag abort at sdk+0x126490 (StandardAllocator::Initialize, called from nninitStartup at main+0x73adcc); the NSP script's heap check reported "the host stopped before nnMain". The sdk build is Unicorn Overlord's, whose NPDM declares no system resource, so it never needed the cut; Unicorn Overlord runs the same with it. The constructor takes it at +0x134778 / +0x13480c.
• Measured with probes on VammManager::AllocateAddressRegion's success path (sdk+0x1348b8: x21 size, x22 address) and FreeAddressRegion (sdk+0x135100): StandardAllocator takes 960 MB at +64 MB (it ends at +1.0 GB), and Unity's own regions (main+0x11bb4cc) hold about 0.54 GB more. Over four minutes of level loads the live regions end at +2.0 to +2.1 GB of the 4.375 GB alias region. In 20 minutes the mapped high-water mark stopped at +2.51 GB (about 4 minutes in), at most 0.5 GB mapped, about 0.75 GB resident on the Mac. The bring-up run (five minutes of level loads) had the high-water mark at +2.25 GB.
• With this layout the game boots to its title in 5 s with no red line.

Input

• Controller only (stick or D-pad, A, B, +): the game never reads the touch screen, so it stays docked at 1920x1080 and the virtual gamepad starts in the 2D layout.

Files and shaders

• 496 stage shaders in the player's serialized files (Data/*.assets, Data/Resources) and main: 439 engine built-ins, 46 of the game's, 11 of the player's in main, and the built-in VR blit's geometry shader, which does not build.
• Resolved: the split stopped with "no bundle has a Shader type tree of the same hash to borrow". There are only Data/*.assets, level* and the two engine files in Data/Resources, none with type trees, and no bundle. The Shader type hash there (ea424a5f…) is the one in Ace Attorney Investigations Collection's bundles (2022.3.17f1): the same layout. unityfs.py now carries that layout written out (KNOWN_TREES: about 30 structs; tree_from_layout builds the tree a file with type trees would have), and the split's second pass gives it to the stripped files when no bundle lent a tree of that hash.
• It calls GetSharedFontAddress without importing ScalableFontEngineHelper::Decode, so the host gives it the TTF itself (font_skip, see Patrick's Parabox).

Mac routes

• DM_KEYS="f400:A,f700:A,f1000:A,f1200:Right,f1300:A" starts a new game, enters level 1 and clears it (Level Complete at about frame 1,350).

Found on this game

General changes first needed here; each applies to every game:

• Written-out Shader layouts for Unity players with no bundle to borrow a tree from (KNOWN_TREES, tree_from_layout, given in the split's second pass): Unity Shader layouts written out for players without bundles.
• The node area cut on an sdk build whose first game never needed it (Unicorn Overlord's): The SDK's address-region node area.

Open

• The built-in VR blit's geometry shader does not build.
• game.tsv has no sys_resource row, so the host reports its default, 32 MB (game.py, hle_svc.c), where the NPDM declares 16 MB.