The bit was at address 0x3F . In the original 2011 configuration, that bit was a zero. It meant "PCIe Gen 2.0 speed only."

And went back to sleep.

0x01 : Companion lost.

Not random. The Z80's program counter was advancing in a perfect linear sequence. The toggles happened every 1,024 cycles. A square wave. A clock.

And it didn't care. It was talking .

Not enough to boot. Just enough to jostle .

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