DS game only 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 77 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 + 77 * 0x20, allocates the destination
RAM region at 0x021597a0, decompresses
the body in-place (if compressed), and resolves any external
relocations.
To inspect this overlay outside the running game, decompress
overlay/overlay_077.bin with
ndspy.codeCompression.decompress() (Python ndspy library)
and load the resulting plaintext into Ghidra or
IDA at base address 0x021597a0. The
raw Ghidra auto-analysis dump used to populate this page lives at
notes/overlay_knowledgebase/raw/ov077.json;
the per-overlay descriptive markdown is at
notes/overlay_knowledgebase/ov077.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
This overlay references no container files β it is pure code (or reads only from globals shared with the persistent ARM9 binary).
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 18 functions
| # | Address | Size | Calls | Strings | Role hint |
|---|---|---|---|---|---|
| 1 | 0x021598d4 | 16 | 0 | 0 | trampoline / small helper |
| 2 | 0x021598e8 | 28 | 3 | 0 | trampoline / small helper |
| 3 | 0x02159948 | 110 | 4 | 0 | code |
| 4 | 0x021599c8 | 62 | 0 | 0 | code |
| 5 | 0x02159a10 | 100 | 1 | 0 | code |
| 6 | 0x02159a7c | 58 | 4 | 0 | code |
| 7 | 0x02159ac4 | 92 | 2 | 0 | code |
| 8 | 0x02159b28 | 228 | 8 | 0 | code |
| 9 | 0x02159c14 | 144 | 5 | 0 | code |
| 10 | 0x02159ca4 | 44 | 1 | 0 | code |
| 11 | 0x02159cd0 | 104 | 1 | 0 | code |
| 12 | 0x02159d38 | 116 | 5 | 0 | code |
| 13 | 0x02159db4 | 338 | 14 | 0 | code |
| 14 | 0x02159f10 | 76 | 3 | 0 | code |
| 15 | 0x02159f5c | 142 | 4 | 0 | code |
| 16 | 0x02159ff4 | 34 | 1 | 0 | trampoline / small helper |
| 17 | 0x0215a018 | 56 | 3 | 0 | code |
| 18 | 0x0215a050 | 146 | 4 | 0 | code |
Open questions & conflicts
Open questions / unknowns
- Auto-analysis identified 18 functions covering 1894 of 2656 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
- No major conflicts detected with prior-pass `overlay_role_final.json` record.
Source
- Per-overlay markdown:
notes/overlay_knowledgebase/ov077.md - Raw Ghidra dump:
notes/overlay_knowledgebase/raw/ov077.json - Overlay-system explainer: overlays system
- Plain-English overlay primer: overlay knowledgebase