Case study

Minisforum MS-A1: reconstructing embedded-controller sensor access

Minisforum MS-A1 EC fan / temperature driver documents the embedded controller's sensor command exchange and implements a Linux hwmon module for CPU temperature, board temperature and three fan RPM readings. The investigation records direct port I/O at 0x6C and 0x68, the 0xDD temperature and 0xD5 fan commands, and a command sweep used to examine the available interface.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 1
Last commit: 2026-06-14
Language: C
License (GitHub): GPL-2.0

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: A Minisforum MS-A1 and Linux kernel build environment are required for the driver.
Prerequisites: Secure Boot installations require module signing and one-time MOK enrollment.
Scope: The driver exposes read-only sensors; it does not control fan speed.
License: Licensed under GPL-2.0.

Cite

BibTeX

@misc{ms-a1-ec-case,
  title = {{Minisforum MS-A1: reconstructing embedded-controller sensor access}},
  howpublished = {\url{https://github.com/Gitii/ms-a1-fan-controller}},
  url = {https://github.com/Gitii/ms-a1-fan-controller},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/ms-a1-ec-case/}}
}

Plain text

Minisforum MS-A1: reconstructing embedded-controller sensor access. https://github.com/Gitii/ms-a1-fan-controller (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/ms-a1-ec-case/

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About this entry

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Primary sources

docs/FINDINGS.md GitHub · Gitii/ms-a1-fan-controller · Revision e5a2187
README.md GitHub · Gitii/ms-a1-fan-controller · Revision e5a2187