Apple Open Source: the drivers

Hollis R Blanchard hollis+ at
Thu Mar 18 07:40:20 EST 1999

On Wed, 17 Mar 1999, Benjamin Herrenschmidt wrote:
> Ok, I finally found where the driver are hidden: In the kernel archive,
> in bsd/dev/ppc. They are mostly objective C drivers. Among other things,
> there are drivers for the PowerMac ATA with apparently all the timing
> stuffs, and for the CMD646 controller in the blue G3.

So they're useful? Last night I suddenly got worried because OS X is based on
Mach... so wouldn't any OS X drivers be more helpful to the MkLinux folks than
to monolithic Linux?

And another question: how is it that OS X, based on Mach, is still comparable
in speed to other non-microkernel operating systems? It was my (uneducated)
impression that one of the tradeoffs of a microkernel was a performance


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