DS game only ov048 general_2d_ui
containers: 2d/selectrecipe.lzs, recipe/recipedata.lzs, recipe/recipemsg.lzs (+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 48 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 + 48 * 0x20, allocates the destination
RAM region at 0x02155a00, decompresses
the body in-place (if compressed), and resolves any external
relocations.
To inspect this overlay outside the running game, decompress
overlay/overlay_048.bin with
ndspy.codeCompression.decompress() (Python ndspy library)
and load the resulting plaintext into Ghidra or
IDA at base address 0x02155a00. The
raw Ghidra auto-analysis dump used to populate this page lives at
notes/overlay_knowledgebase/raw/ov048.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov048.md.
Embedded strings
1 UTF-16 LE string 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.
-
selectrecipeβdata/2d/selectrecipe.lzs
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/selectrecipe.lzsβ no matching container found in clean extract -
recipe/recipedata.lzsβ no matching container found in clean extract -
recipe/recipemsg.lzsβ no matching container found in clean extract -
recipeposβ 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 31 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x02155a70 | 106 | 11 | 0 | code |
| 2 | 0x02155ae0 | 824 | 48 | 4 | refs: recipe/recipedata.lzs \| recipepos \| recipe/recipemsg.lzs \| 2d/selectrecipe.lzs |
| 3 | 0x02155e5c | 48 | 6 | 0 | code |
| 4 | 0x02155e8c | 618 | 35 | 0 | high-fan-out (likely dispatcher / setup) |
| 5 | 0x02156104 | 12 | 0 | 0 | trampoline / small helper |
| 6 | 0x02156118 | 22 | 2 | 0 | trampoline / small helper |
| 7 | 0x02156134 | 22 | 2 | 0 | trampoline / small helper |
| 8 | 0x02156150 | 52 | 0 | 0 | code |
| 9 | 0x02156188 | 76 | 3 | 0 | code |
| 10 | 0x021561d4 | 56 | 1 | 0 | code |
| 11 | 0x02156210 | 22 | 1 | 0 | trampoline / small helper |
| 12 | 0x0215622c | 48 | 3 | 0 | code |
| 13 | 0x02156260 | 48 | 3 | 0 | code |
| 14 | 0x02156294 | 26 | 3 | 0 | trampoline / small helper |
| 15 | 0x021562b4 | 26 | 3 | 0 | trampoline / small helper |
| 16 | 0x021562d4 | 10 | 0 | 0 | trampoline / small helper |
| 17 | 0x021562e8 | 10 | 0 | 0 | trampoline / small helper |
| 18 | 0x021562fc | 10 | 0 | 0 | trampoline / small helper |
| 19 | 0x02156310 | 10 | 0 | 0 | trampoline / small helper |
| 20 | 0x02156324 | 198 | 6 | 0 | code |
| 21 | 0x021563f4 | 124 | 5 | 0 | code |
| 22 | 0x02156478 | 282 | 7 | 0 | code |
| 23 | 0x02156598 | 382 | 18 | 6 | refs: selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe |
| 24 | 0x02156734 | 84 | 7 | 0 | code |
| 25 | 0x02156788 | 440 | 18 | 0 | code |
| 26 | 0x02156978 | 378 | 19 | 6 | refs: selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe \| selectrecipe |
| 27 | 0x02156b18 | 72 | 8 | 0 | code |
| 28 | 0x02156b68 | 528 | 54 | 0 | high-fan-out (likely dispatcher / setup) |
| 29 | 0x02156d84 | 22 | 1 | 0 | trampoline / small helper |
| 30 | 0x02156da0 | 22 | 1 | 0 | trampoline / small helper |
| 31 | 0x02156dc0 | 12 | 1 | 0 | trampoline / small helper |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 31 functions covering 4590 of 5408 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
- Partial overlap: prior-pass had `['selectrecipe']`; Ghidra adds `['2d/selectrecipe.lzs', 'recipe/recipedata.lzs', 'recipe/recipemsg.lzs', 'recipepos']`.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov048.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov048.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase