DS game only ov014 general_2d_ui
containers: 2d/ein_upbg.lzs, ein_upbg, entryitmname
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 14 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 + 14 * 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_014.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/ov014.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov014.md.
Embedded strings
No UTF-16 LE strings are embedded directly in this overlay's binary. Any text it displays at runtime comes from a container file loaded via the content cache.
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.
-
ein_upbgβdata/2d/ein_upbg.lzs -
entryitmnameβdata/entryitmname.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/ein_upbg.lzsβ 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 36 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x02155a00 | 132 | 0 | 0 | code |
| 2 | 0x02155a84 | 126 | 11 | 0 | code |
| 3 | 0x02155b0c | 1,886 | 117 | 3 | refs: 2d/ein_upbg.lzs \| entryitmname.lzs \| entryitmname.lzs |
| 4 | 0x02156308 | 64 | 6 | 0 | code |
| 5 | 0x02156348 | 840 | 45 | 0 | high-fan-out (likely dispatcher / setup) |
| 6 | 0x021566a8 | 350 | 16 | 0 | code |
| 7 | 0x02156814 | 24 | 1 | 0 | trampoline / small helper |
| 8 | 0x02156830 | 12 | 0 | 0 | trampoline / small helper |
| 9 | 0x02156844 | 12 | 0 | 0 | trampoline / small helper |
| 10 | 0x02156858 | 106 | 5 | 0 | code |
| 11 | 0x021568c8 | 36 | 3 | 0 | trampoline / small helper |
| 12 | 0x021568ec | 76 | 0 | 0 | code |
| 13 | 0x02156938 | 94 | 4 | 0 | code |
| 14 | 0x02156998 | 56 | 1 | 0 | code |
| 15 | 0x021569d4 | 22 | 1 | 0 | trampoline / small helper |
| 16 | 0x021569f0 | 102 | 7 | 0 | code |
| 17 | 0x02156a5c | 130 | 8 | 0 | code |
| 18 | 0x02156ae8 | 46 | 5 | 0 | code |
| 19 | 0x02156b1c | 38 | 3 | 0 | trampoline / small helper |
| 20 | 0x02156b48 | 26 | 2 | 0 | trampoline / small helper |
| 21 | 0x02156b68 | 10 | 0 | 0 | trampoline / small helper |
| 22 | 0x02156b7c | 10 | 0 | 0 | trampoline / small helper |
| 23 | 0x02156b90 | 26 | 2 | 0 | trampoline / small helper |
| 24 | 0x02156bb0 | 26 | 2 | 0 | trampoline / small helper |
| 25 | 0x02156bd0 | 570 | 30 | 0 | high-fan-out (likely dispatcher / setup) |
| 26 | 0x02156e1c | 106 | 3 | 0 | code |
| 27 | 0x02156e8c | 60 | 4 | 0 | code |
| 28 | 0x02156ecc | 94 | 4 | 1 | refs: ein_upbg |
| 29 | 0x02156f3c | 40 | 2 | 0 | code |
| 30 | 0x02156f68 | 40 | 3 | 0 | code |
| 31 | 0x02156f94 | 190 | 11 | 2 | refs: entryitmname \| entryitmname |
| 32 | 0x02157070 | 70 | 6 | 0 | code |
| 33 | 0x021570bc | 462 | 28 | 0 | high-fan-out (likely dispatcher / setup) |
| 34 | 0x021572a0 | 324 | 11 | 0 | code |
| 35 | 0x021573e8 | 16 | 1 | 0 | trampoline / small helper |
| 36 | 0x021573fc | 22 | 2 | 0 | trampoline / small helper |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 36 functions covering 6244 of 6880 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 `['entryitmname']`; Ghidra adds `['2d/ein_upbg.lzs', 'ein_upbg']`.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov014.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov014.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase