4GB RAM support

U

Unknown

Go back and reread your original response as if you were new to computers.
It leaves completely wrong impressions on new people.
Just like your main power switch.
I did make one very bad error-----using the video card as an example to
you..
 
J

John John

You have made a complete ass of yourself and proved once again that you
don't know what you are talking about. My post was correct and I stand
by it. The information provided in the links that I supplied supports
what I said in my first post, you are just an argumentative troll who
wants to argue about things you know nothing of. The main power switch
is another one of these arguments that you started because you can't
read and comprehend anything, I was right there too, you can't read and
you twist everything around then you weasel out when asked to back up
your arguments.

You have not explained why 32-bit Windows XP users cannot see and use
all the RAM when 4GB is installed, why not? Because you don't know what
you are talking about, that is why, you are nothing but a troll. My
discussion here is over, post whatever lies and misinformation that you
want, I really don't give a hoot.

John
 
U

Unknown

Yep; when you're wrong you revert to name calling and insults just like you
did before. Of course in your mind
you're never wrong.
You just cannot understand that I/O devices can be MMIO or non MMIO
therefore you
think you need more than 4gb of addressing.
 
S

Sam Hobbs

A 32-bit address can address 4 GB. Windows can assign virtual storage
addresses different from physical addresses. Therefore when total physical
memory is less than 4 GB, Windows can use virtual addresses that do not
coincide with physical addresses. When physical memory occupies all of the
available address range, then when anything such as a device requires a
specific address, that address cannot be used for anything else.

Of course, that is not a complete explanation. I admit I can be wrong. It
might be an explanation but if so then there are details I am not clear
about. Due to virtual storage, it is entirely possible to allocate a virtual
storage address most anywhere, including an address that would be used by
hardware in the physical addresses.

Note that the BIOS occupies the top of the address range.
 

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