ov075 — overlay detail · Tongari Boushi Archive

ov075 body_no_strings

UTF-16 strings: 1 embedded

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.

Overlay ID 75

File ID 75

RAM load address 0x021597a0

RAM size 6,496 bytes (0x1960)

BSS size 0 bytes

On-disk compressed size 4,552 bytes

Compression flag 0x1 (BLZ-compressed)

Functions 33

External calls 39

Jump tables 9

Data items 97

Code coverage 85% (5,516 of 6,496 bytes)

Reading the binary

The overlay ships on the cart at file ID 75 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 + 75 * 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_075.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/ov075.json; the per-overlay descriptive markdown is at notes/overlay_knowledgebase/ov075.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.

0x02159d2e `ド瀁滐朐梠桦`

Container references

This overlay references no container files — 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 33 functions

#	Address	Size	Calls	Role hint
1	0x021598f0	16	0	trampoline / small helper
2	0x02159904	28	3	trampoline / small helper
3	0x02159924	72	3	code
4	0x02159984	612	4	code
5	0x02159c24	112	10	code
6	0x02159ca0	78	2	code
7	0x02159cf0	940	37	high-fan-out (likely dispatcher / setup)
8	0x0215a0b4	6	0	trampoline / small helper
9	0x0215a0c4	336	13	code
10	0x0215a224	298	11	code
11	0x0215a35c	350	15	code
12	0x0215a4cc	350	15	code
13	0x0215a63c	236	10	code
14	0x0215a72c	92	4	code
15	0x0215a788	138	4	code
16	0x0215a814	152	5	code
17	0x0215a8ac	62	1	code
18	0x0215a8ec	72	4	code
19	0x0215a934	44	2	code
20	0x0215a960	90	1	code
21	0x0215a9bc	60	2	code
22	0x0215a9f8	164	5	code
23	0x0215aaa0	346	17	code
24	0x0215ac08	34	1	trampoline / small helper
25	0x0215ac30	20	0	trampoline / small helper
26	0x0215ac44	112	4	code
27	0x0215acb8	40	2	code
28	0x0215ace4	140	8	code
29	0x0215ad74	172	9	code
30	0x0215ae24	92	3	code
31	0x0215ae84	32	2	trampoline / small helper
32	0x0215aea4	62	4	code
33	0x0215aee4	158	3	code

Open questions & conflicts

Open questions / unknowns

Auto-analysis identified 33 functions covering 5516 of 6496 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/ov075.md
Raw Ghidra dump: notes/overlay_knowledgebase/raw/ov075.json
Overlay-system explainer: overlays system
Plain-English overlay primer: overlay knowledgebase

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