Different Mac Models.

[Benjamin Herrenschmidt]

On Wed, Mar 15, 2000, Iain Sandoe <iain at sandoe.co.uk> wrote:


>firmware as in local (to the PMU) flash/rom...
>or loaded up from 'system' rom...
>or something else ?

Certainly local. The PMU runs all the time when the machine is plugged
and controls the power to all other HW in the machine, including the CPU.
At least it works this way on the powerbooks. If the PMU has no firmware,
the machine won't even boot.


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