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A Sinclair ZX81 web assembler and simulator

A retro assembler and simulator the author says he would not have built without Claude.

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Credits

  • HN submitter andromaton Source ↗

Earliest dated source: 11 Aug 2025

The full story

Sinclaude is a web-based Z80 assembler and simulator for the Sinclair ZX81. The author says they wouldn't have taken the time to build it without the speed-up Claude provided. It got 80 points on Hacker News, where ZX81 owners shared memories of learning Z80 assembly on it.

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Sources

From a short post by the maker, so the details are as they tell them.

  • Hacker News: Show HN: A Sinclair ZX81 retro web assembler+simulatorForum threadnews.ycombinator.com
    HN submitter: andromatonPosted 11 Aug 2025

    The Show HN post (80 points) with a link to the simulator.

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Prompt & Solder

An independent community project. Not affiliated with Anthropic.

What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

How far to trust it. We summarise what people reported and say what each build rests on: a full write-up with code, a short post, or a passing comment. We haven't tested them ourselves. Photos are shown from the original sources with credit. Only modify hardware you own, and back up first.

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