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Re: Fwd: memory probing
From: |
alfred hitch |
Subject: |
Re: Fwd: memory probing |
Date: |
Tue, 10 May 2005 22:11:26 -0400 |
Hi Stefan,
thanks for your reply,
but I am still not very clear on how this is done by say bios on x86
plattforms, ?
can u please expain in more detail abt this north bridge , south
bridge thing .. ?
I would like to try and recreate the same way of probing for our set
up, may be its not that portable , but atleast works on our series of
products ..
What registers are these ?
Cheers,
Alfred
On 5/10/05, Stefan Reinauer <address@hidden> wrote:
> * alfred hitch <address@hidden> [050510 12:23]:
> > anyways, how can u get this from processor also ?
>
> The processor has little to nothing to do with this.. it's dependent on
> the northbridge and southbridge.
>
> > I vaguely remember see'ing some code where someone on a i386 based
> > plattform but WITHOUT bios, used smbus protocol to talk to a device
> > across PIIX4 to get the info.
>
> Which might work on one motherboard and fail on another. Even if they
> both have a PIIX4.
>
> > I am not familiar with PC architecture, so can someone tell me if
> > there is some standard chip (memory controller? ?) where one can read
> > this on PC type arch. atleast ?
>
> No. Not in a portable way. That's why BIOS provides the e820 table.
>
> > I am on a IXDP425 plattform, and so far I cannot see any such
> > register on the data sheets ..
>
> They are usually not disclosed in publically available datasheets.
>
> Stefan
>
>
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>
- memory probing, alfred hitch, 2005/05/10
- Re: memory probing, coly li, 2005/05/10
- Re: Fwd: memory probing, coly li, 2005/05/10
- Re: Re: Fwd: memory probing, coly li, 2005/05/10
- Re: Fwd: memory probing, Marco Gerards, 2005/05/10
- Re: Fwd: memory probing, alfred hitch, 2005/05/10
- Re: Fwd: memory probing, Stefan Reinauer, 2005/05/10
- Re: Fwd: memory probing,
alfred hitch <=
- Re: Fwd: memory probing, Douglas Wade Needham, 2005/05/11
- Re: Fwd: memory probing, alfred hitch, 2005/05/11
- Re: Fwd: memory probing, Douglas Wade Needham, 2005/05/11