Messages in this thread | | | Date | Tue, 13 Jan 1998 21:09:02 +0100 (CET) | From | MOLNAR Ingo <> | Subject | Re: Using >1GB RAM |
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On Tue, 13 Jan 1998, Albert D. Cahalan wrote:
> Perhaps a new architecture, p6big. Mostly it would have symbolic > links into the i386 code. The page tables would use the weird > 36-bit Pentium Pro features (64 GB physical memory). Segments > would be used everywhere. All the old segment registers get used > as originally intended, but to go past 4 GB in 1998. > > For really big processes, gcc needs to learn about 48-bit far pointers.
no, the PPro 'bigphys' feature extends physical memory space to 64G (actually extends it to 64 bits, but i guess the CPU itself is 64G limited), but logical address space will stay pure 32 bits.
hm, is such 'above 4G' memory PCI DMA-able? it's pretty much useless if it doesnt integrate well into PCI.
-- mingo
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