DS game only ov109 magic_ui
containers: 2d/inputmagic/%s.ofs, mgc00, mgc80 (+2 more)
Header
Numeric metadata for this overlay as read from the overlay table at ROM
offset 0x8DE00 (per-entry stride 32 bytes). Function
counts, data-item counts, and the call-graph fan-out are from a Ghidra
11.3.1 headless auto-analysis pass.
Reading the binary
The overlay ships on the cart at file ID 109 under the BLZ code-LZ compression wrapper (the same backward-LZ scheme Nintendo uses for executable ARM9 code).
At load time the engine reads the overlay table entry at ROM offset
0x8DE00 + 109 * 0x20, allocates the destination
RAM region at 0x0215c540, decompresses
the body in-place (if compressed), and resolves any external
relocations.
To inspect this overlay outside the running game, decompress
overlay/overlay_109.bin with
ndspy.codeCompression.decompress() (Python ndspy library)
and load the resulting plaintext into Ghidra or
IDA at base address 0x0215c540. The
raw Ghidra auto-analysis dump used to populate this page lives at
notes/overlay_knowledgebase/raw/ov109.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov109.md.
Embedded strings
2 UTF-16 LE strings live inside this overlay's compiled binary. These addresses are absolute (inside the overlay's RAM image after load). The text is stored as little-endian UTF-16 code units, NUL-terminated.
Container references
Distinct container basenames referenced by this overlay. Each is loaded via the content cache by passing the basename string to a lookup that resolves it to a file ID in the ROM's FAT. The path column shows the file's location in the clean extract, where resolved.
-
mgc00âdata/2d/inputmagic/mgc00.ofs -
mgc80âdata/2d/inputmagic/mgc80.ofs -
mgcallâdata/2d/inputmagic/mgcall.ofs -
orderâdata/2d/inputmagic/order.ofs
Unresolved
These container basenames appeared in the overlay's string table but no file of that name was found in the clean extract. Most are false-positive ASCII matches (function names, register maps, fragments of other strings); a few may be containers that the overlay names but never actually opens. Listed for completeness.
-
2d/inputmagic/%s.ofsâ no matching container found in clean extract
Function list
Functions Ghidra auto-identified inside this overlay's RAM range.
Names prefixed FUN_ are auto-generated from the function's
entry address; size is in bytes; the "calls" column counts both
intra-overlay branches and external ARM9 call targets. The "strings"
column counts how many UTF-16 LE strings each function references.
Show all 5 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x0215c540 | 58 | 3 | 0 | code |
| 2 | 0x0215c604 | 16 | 0 | 0 | trampoline / small helper |
| 3 | 0x0215c614 | 740 | 23 | 8 | refs: 2d/inputmagic/%s.ofs \| order \| 2d/inputmagic/%s.ofs \| 2d/inputmagic/%s.ofs \| mgcall \| order |
| 4 | 0x0215c950 | 208 | 5 | 0 | code |
| 5 | 0x0215ca24 | 12 | 1 | 0 | trampoline / small helper |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 5 functions covering 1034 of 1472 overlay bytes.
- Function names are auto-generated `FUN_<addr>`. Manual renaming based on call-graph + string-ref analysis is a follow-up.
- BSS size is 0 bytes; Ghidra-imported overlay does not include BSS so any references into the BSS range appear as unresolved.
Conflicts with the prior shallow pass
- **Mismatch:** prior-pass `controls_containers` = `['inputmagic']`; Ghidra-extracted containers = `['2d/inputmagic/%s.ofs', 'mgc00', 'mgc80', 'mgcall', 'order']`. Ghidra wins.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov109.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov109.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase