memory mapped IO on a machine with 4 GB of RAM?

Hi list,

I was wondering that if a machine has 4 GB of physical RAM, then how
will the devices map their registers to memory?

So if a device maps its registers in say memory address X, then will
that particular physical memory become inaccessible to the system?

Thanks,

Rajat
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Re: memory mapped IO on a machine with 4 GB of RAM?

> I was wondering that if a machine has 4 GB of physical RAM, then how
> will the devices map their registers to memory?
>
> So if a device maps its registers in say memory address X, then will
> that particular physical memory become inaccessible to the system?

I think it should be true. It's inaccessible...

--
Bora SAHIN

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