DS game only ov049 general_2d_ui
containers: 2d/itemstackwnd.lzs, 2d/sellitem.lzs, sellitem
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 49 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 + 49 * 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_049.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/ov049.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov049.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.
-
sellitemβdata/2d/sellitem.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/itemstackwnd.lzsβ no matching container found in clean extract -
2d/sellitem.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 40 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x02155b14 | 756 | 52 | 2 | refs: 2d/sellitem.lzs \| 2d/itemstackwnd.lzs |
| 2 | 0x02155e44 | 16 | 0 | 0 | trampoline / small helper |
| 3 | 0x02155e54 | 1,038 | 44 | 0 | high-fan-out (likely dispatcher / setup) |
| 4 | 0x02156280 | 242 | 14 | 3 | refs: sellitem.lzs \| sellitem.lzs \| sellitem.lzs |
| 5 | 0x0215638c | 64 | 5 | 0 | code |
| 6 | 0x021563d0 | 198 | 7 | 0 | code |
| 7 | 0x021564a0 | 98 | 0 | 0 | code |
| 8 | 0x02156508 | 136 | 9 | 0 | code |
| 9 | 0x021565a0 | 54 | 2 | 0 | code |
| 10 | 0x021565d8 | 574 | 20 | 0 | code |
| 11 | 0x02156824 | 188 | 9 | 0 | code |
| 12 | 0x021568e8 | 188 | 5 | 0 | code |
| 13 | 0x021569b0 | 446 | 19 | 0 | code |
| 14 | 0x02156b8c | 16 | 0 | 0 | trampoline / small helper |
| 15 | 0x02156ba0 | 12 | 1 | 0 | trampoline / small helper |
| 16 | 0x02156bb0 | 12 | 0 | 0 | trampoline / small helper |
| 17 | 0x02156bc0 | 12 | 1 | 0 | trampoline / small helper |
| 18 | 0x02156bd0 | 384 | 9 | 0 | code |
| 19 | 0x02156d64 | 486 | 15 | 0 | code |
| 20 | 0x02156f6c | 986 | 24 | 0 | high-fan-out (likely dispatcher / setup) |
| 21 | 0x02157370 | 298 | 13 | 0 | code |
| 22 | 0x021574b4 | 60 | 3 | 0 | code |
| 23 | 0x021574f4 | 134 | 6 | 0 | code |
| 24 | 0x02157588 | 1,204 | 34 | 0 | high-fan-out (likely dispatcher / setup) |
| 25 | 0x02157a7c | 1,478 | 55 | 0 | high-fan-out (likely dispatcher / setup) |
| 26 | 0x02158080 | 22 | 2 | 0 | trampoline / small helper |
| 27 | 0x02158098 | 86 | 4 | 0 | code |
| 28 | 0x021580f4 | 74 | 5 | 0 | code |
| 29 | 0x02158144 | 80 | 5 | 0 | code |
| 30 | 0x02158198 | 192 | 0 | 0 | code |
| 31 | 0x02158258 | 66 | 1 | 0 | code |
| 32 | 0x021582a4 | 58 | 1 | 0 | code |
| 33 | 0x021582e4 | 84 | 0 | 0 | code |
| 34 | 0x02158338 | 94 | 5 | 0 | code |
| 35 | 0x021583a0 | 304 | 23 | 0 | high-fan-out (likely dispatcher / setup) |
| 36 | 0x021584d8 | 120 | 2 | 0 | code |
| 37 | 0x02158554 | 60 | 0 | 0 | code |
| 38 | 0x02158590 | 114 | 4 | 0 | code |
| 39 | 0x02158608 | 112 | 6 | 0 | code |
| 40 | 0x0215867c | 12 | 1 | 0 | trampoline / small helper |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 40 functions covering 10558 of 12672 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 `['itemstackwnd', 'sellitem']`; Ghidra adds `['2d/itemstackwnd.lzs', '2d/sellitem.lzs']`.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov049.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov049.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase