4GB RAM limit?

[Joshua Oreman]

On Tue, Jul 01, 2003 at 06:30:13PM +0000 or thereabouts, george donnelly wrote:
> hi
> 
> I've got a 4.7 freebsd machine and after upgrading from 4 to 6GB of RAM, top
> does not recogmize the other 2 GB (only shows 4) and actually there was a
> message that said "ignoring 2 GB".
> 
> Can anyone shed light on this or suggest where i can look to understand
> this?

AFAIK, on i386 the maximum addressable memory space is 4096 MB.
Here's why:
C pointer = 4 bytes = maximum value 4294967296

-- Josh

> 
> tia
> 
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