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Restore complete numbered save state

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gamer147
2026-07-24 18:43:21 -04:00
parent ac265e576d
commit abda5b21c1
15 changed files with 329 additions and 61 deletions
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14
docs/sys4-format-notes.md
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@@ -198,8 +198,8 @@ The decoded layout-3 body begins:
|---:|---:|---|
| `0x000` | 4 | terminal saved-frame index, called `cutoff`; frame count is `cutoff + 1` |
| `0x004` | 4 | saved frame-owner/context word |
| `0x008` | 4 | engine-state word |
| `0x00c` | `0x28` | ten engine/context state DWORDs |
| `0x008` | 4 | current direct-name BGM track id |
| `0x00c` | `0x28` | ten packed SFX resource ids, one per retained channel |
| `0x034` | `0x4b0` | 100 resource-reload records of three DWORDs |
| `0x4e4` | `0x4e20` | 1,000 surface-reload records of 20 bytes |
| `0x5304` | `(cutoff + 1) * 0x414` | saved script-frame records |
@@ -233,6 +233,13 @@ The integer and float arrays follow their counts. String count comes from bank c
begins with an additional `string_blob_dwords` followed by that many bytes of concatenated NUL-terminated
CP932 strings and DWORD padding. The three pointer-family DWORD arrays follow.
These counts are serialized mutable-prefix lengths, not declarations that every typed runtime bank ends
there. Native deserialization zeroes and replaces only each counted prefix. Initialization-authored
definitions after the prefix remain live: in Himegari the saved integer prefix ends at `0x6241b`, before
unit/stage definition tables such as `0x66716` and `0xe8275`, while the saved string prefix ends at
`0x315`, exactly where `unit_story_display_names` begins. Clearing the whole runtime dictionary during
import therefore destroys data that is intentionally absent from the numbered file.
Retained graphics then uses:
```text
@@ -252,7 +259,8 @@ records actually written (`0x2e1 + object_count * 0x2d8` DWORDs in the graphics
zero/slack bytes after the meaningful range record.
The installed `SAVE00.DAT` validates the complete layout-3 decode: cutoff 1, global-bank counts
`[402459,1,789,1,1,1]`, and 211 retained graphics objects.
`[402459,1,789,1,1,1]`, current BGM id `0x18`, retained SFX ids `0x3321` (channel 1) and
`0x2aea` (channel 2), and 211 retained graphics objects.
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