Image: reddit.com · Jesus Christ that's scary
Custom ECU patches and a CPU emulator for a 20-year-old engine computer
Opus wrote raw-assembly patches for an old ECU and then started writing an SH-2E CPU emulator in Java to test them.
Credits
- Reddit poster Remove_Forward Source ↗
Earliest dated source:
The full story
The poster is building custom patches for the ECU of a platform more than 20 years old with little documentation. Opus writes the patches in raw assembly, but testing means flashing the ECU, going for a drive and logging variables to feed back to Opus, which is slow.
They asked Opus to find an emulator. None existed, and Opus replied that it was writing an SH-2E CPU core in Java. The post does not say whether the emulator was finished or worked.
How it was done
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Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: Jesus Christ that's scaryReddit poster: Remove_ForwardPosted
The maker's post on r/ClaudeCode.
If it disappears: archived copy of Reddit: Jesus Christ that's scary (opens in a new tab)