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Someone got iPhone OS 1.0 running in a browser tab.

It’s a little broken as a result of being a nearly 20 year old operating system, but it’s a joy to play around with. Kelindi says in a follow up post that the OS is “running on an emulated ARM11 CPU and S5L8900 chipset, compiled to WebAssembly.” [Media: https://twitter.com/_kelindi_/status/2110042599285194963?s=20]

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It’s a little broken as a result of being a nearly 20 year old operating system, but it’s a joy to play around with. Kelindi says in a follow up post that the OS is “running on an emulated ARM11 CPU and S5L8900 chipset, compiled to WebAssembly.”

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Thursday, October 15, 2026

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