38 lines
2.2 KiB
Markdown
38 lines
2.2 KiB
Markdown
# Third-party notices and research acknowledgments
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This file records incorporated third-party code and prior public research that materially informed this
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project. It does not license Eushully game assets or code, and no original game files are distributed with
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this repository.
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## Eushully-Decompiler research
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Early SYS4 instruction decoding and the initial opcode ABI/catalog were informed by Kelebek's public
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[Eushully-Decompiler](https://github.com/Kelebek1/Eushully-Decompiler) project. That work established a
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valuable starting point and accelerated this reimplementation. Historical and per-opcode provenance is
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preserved in `vm-map/opcodes.toml`.
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This repository does not vendor the upstream source files. Its opcode registry combines that foundational
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catalog with independent script-corpus analysis, native `AGE.EXE` investigation, runtime probes, and
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reimplementation testing. This acknowledgment is not a claim that the project was developed under a formal
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clean-room process.
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## GARbro AGF decoding algorithm
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`engine/Age.Engine/Sys4/AgfDecoder.cs` ports the AGF decoding algorithm from GARbro's
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`ArcFormats/Eushully/ImageAGF.cs`, Copyright (c) 2014-2020 morkt, under the MIT License:
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> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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> associated documentation files (the "Software"), to deal in the Software without restriction, including
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> without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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> copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
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> following conditions:
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>
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> The above copyright notice and this permission notice shall be included in all copies or substantial
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> portions of the Software.
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>
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> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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> LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
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> EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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> IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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> USE OR OTHER DEALINGS IN THE SOFTWARE.
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