Re: Use 3GB or 4GB RAM in 32 bit OS?

On Fri, 28 Mar 2008 22:21:05 -0400, Yousuf Khan <bbbl67@[EMAIL PROTECTED]
> put
finger to keyboard and composed:

>Rat River Cemetary wrote:
>> Maybe I got the exact figure wrong then but I thought I used to have 
>> 3.25GB when using a 256mb video card. Doesn't matter, 3GB of usable ram

>> is still better than 2GB and I do have some games that use up a lot of 
>> ram. I should switch to Vista 64bit but I still prefer XP for gameing 
>> with so only use Vista on another PC for internet stuff and digital 
>> imaging etc. That computer only has 2GB of ram anyway.
>
>I doubt the whole 640MB of video memory is fully mapped to the system 
>memory. My guess is that they probably just map perhaps 128M at a time, 
>and slide through the video memory 128MB at a time.
>
>As for my system, I use a 64-bit Ubuntu Linux on another partition. 
>Ubuntu sees only 3.9GB of my 4.0GB, but that's because I got an 
>integrated graphics, and 128MB of it is shared with the video. If I had 
>a discrete graphics, then I could turn off my integrated graphics, and 
>the whole 4.0GB would be used by the system.
>
>	Yousuf Khan

My Internet PC is an old socket 7 box with a Diamond Stealth III S540
PCI card. Win98's Device Manager shows that it is using the following
memory resources:

 FFA80000 - FFAFFFFF  --- 512KB
 F0000000 - F7FFFFFF  --- 128MB (video RAM ???)
 08020000 - 0802FFFF  ---  64KB
 000C0000 - 000CAFFF  ---  44KB (video ROM BIOS extension)
 000B0000 - 000BFFFF  ---  64KB (video RAM below 1MB)
 000A0000 - 000AFFFF  ---  64KB (video RAM below 1MB)

Lavalys Everest tells me that the video adapter has 32MB of RAM which
leads me to wonder why the card's memory address space (128MB) is so
large.

- Franc Zabkar
-- 
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