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re: document SYS4INI logical resolution settings

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gamer147
2026-07-24 14:07:57 -04:00
parent e46d64ecc6
commit 4ebe861b79
5 changed files with 39 additions and 5 deletions
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docs/sys4-format-notes.md
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@@ -14,6 +14,18 @@ live in `tools/probe_*.py`.
> `vm-map/opcodes.toml`. The tag values below (0x71/0x03/0x8F etc.) are the
> *opcodes at table targets*: 0x8F=`call`, 0x03=`call-script`, 0x71=`u0041A7B0`.
## SYS4INI directory and per-game settings trailer — CONFIRMED
`SYS4INI.BIN` is not only the asset catalog. Its `S4IC` LZSS stream begins with the archive names and
80-byte file records documented in `asset-resolution-re.md`, then continues with VM-bank metadata and a
NUL-delimited per-game engine-settings trailer. `tools/parse_sys4ini.py` currently consumes only the
directory prefix.
The Himegari trailer contains `SCREENX=800` and `SCREENY=600`; Kamidori's independent SYS4INI contains
`SCREENX=1024` and `SCREENY=576`. This establishes the authored logical canvas as per-game data. Native
initialization and the executable's `640x480` fallback are documented in `engine-re.md`;
fullscreen/display-mode settings are a separate concern from these logical dimensions.
## Header — CONFIRMED
Fixed 60-byte (0x3C) header: 8-byte magic + thirteen little-endian u32 fields.