From: Neil Russell <neil@c-side.com>
To: James F Dougherty <jfd@krakatoa.gigabitnetworks.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Reading SDRAM Memory Configuration via EEPROM on SIMM
Date: Thu, 15 Nov 2001 22:58:36 -0800 [thread overview]
Message-ID: <20011115225836.B19227@lx.c-side.com> (raw)
In-Reply-To: <200111160524.fAG5OI6U000706@krakatoa.gigabitnetworks.com>; from jfd@krakatoa.gigabitnetworks.com on Thu, Nov 15, 2001 at 09:24:18PM -0800
Most SDRAM chip specs have enough stuff to figure this out. I don't
have an address handy, but if you look at a chip and go to the
manufacturer's web site, ...
Also, LiMon has some code to do some of the SDRAM stuff. It is written
in C, so it won't work on many CPUs, and it doesn't (yet) handle timing;
just geometry. (C works on the 8260 before SDRAM is available because
you can use the internal RAM as a stack.)
www.thinsys.com/limon.html
Neil.
On Thu, Nov 15, 2001 at 09:24:18PM -0800, James F Dougherty wrote:
>
> Does anyone know how to read an SDRAM SIMM EEPROM
> to get the memory configuration data? I remember
> there was a spec for this ... forgot the name...
>
> You basically read I2C data bytes from an EEPROM
> in a standard format.... PC's do this to find memory
> settings..
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-11-16 6:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-16 5:24 Reading SDRAM Memory Configuration via EEPROM on SIMM James F Dougherty
2001-11-16 6:58 ` Neil Russell [this message]
2001-11-16 13:19 ` Jerry Van Baren
2001-11-16 14:58 ` Peter Barada
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