Case study

Daggerfall: matching DOS executable reconstruction and XnGine translation

daggerfall-decomp reconstructs The Elder Scrolls II: Daggerfall 1.07.213 FALL.EXE with Watcom C 10.0a and separately translates its XnGine assembly engine into C. Its tools compare compiled functions, rebuild the executable, run scripted game scenarios and trace asset use. The author reports all 2,297 game C functions matched and a byte-identical FALL.EXE.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 0
Last commit: 2026-10-21
Language: C

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: Provide your own Daggerfall executable and data, Watcom C/C++ 10.0a, and Borland Turbo Assembler 4.0 for rebuilding XnGine.
Prerequisites: The documented workflow uses DOSBox-X and Python tools.
Testing evidence: The author reports 2,297 of 2,297 game C functions matched in FALL.EXE 1.07.213.
License: No licence file in the repository.

Cite

BibTeX

@misc{daggerfall-matching-decomp-case,
  title = {{Daggerfall: matching DOS executable reconstruction and XnGine translation}},
  howpublished = {\url{https://github.com/brotchie/daggerfall-decomp}},
  url = {https://github.com/brotchie/daggerfall-decomp},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/daggerfall-matching-decomp-case/}}
}

Plain text

Daggerfall: matching DOS executable reconstruction and XnGine translation. https://github.com/brotchie/daggerfall-decomp (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/daggerfall-matching-decomp-case/

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About this entry

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Primary sources

README.md GitHub · brotchie/daggerfall-decomp · Revision 6c82057
docs/engine/architecture.md GitHub · brotchie/daggerfall-decomp · Revision 6c82057