Apple Job Posting and Good News for LinuxPPC developers

Gabriel Paubert paubert at
Tue Apr 6 02:11:14 EST 1999

On 3 Apr 1999, Holger Bettag wrote:

> > compiler can allow an application to address more virtual memory through
> > runtime modifications to the virtual segments mapped by the segment
> > registers, like memory overlays.  That was the original reason for the
> > design of the MMU in the POWER (predecessor of PowerPC) architecture.  I
> > do not believe that any compiler / OS combination takes advantage of this
> > facility. 
> >
> Well, so far there are no 32bit PowerPCs that can handle more than 4GB of
> RAM. The rumours I heard indicate that "Max" might be able to handle more.
> That would make messing with segments worth the effort (and would generate
> all the neat problems of segmented addressing schemes).

There is no reasonable way a 32 bit PPC will handle more than 4Gb of
physical RAM. However, with relatively simple patches, Linux could handle
4 Gb per process virtual address space and 3 Gb physical RAM on a 32 bit


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