SiliconPeel

Apple Silicon, peeled back to the bare metal.

An interactive map of the SoC internals — every subsystem, register window, and firmware protocol, reverse-engineered from the silicon and verified against source. It traces the full lifecycle from boot ROM to a running OS, built to power bare-metal bring-up.

Try it out → No install — opens in your browser. Jump to the OS ↔ firmware view

61subsystems mapped

296+source-verified registers

199firmware protocols

390ADT nodes mirrored

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Boot → OS lifecycle

Follow the chain from SecureROM → iBoot → kernel handoff → coprocessor RTKit → bus enumeration → a running OS.

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OS ↔ firmware bowtie

See exactly what macOS or KelvinOS reaches for, and which connections are still missing — the gaps to wire.

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Registers & protocols

Drill from chip → subsystem → register → value → driver API, every offset tagged with its source line.

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Per-chip

Switch between Apple Silicon dies. M4 (t8132) today, extensible to the rest of the family.