[coreboot] [PATCH] ASUS P2B-LS support, RAM detection for 440BX, add Slot 1 CPU, Microcode for Intel Tualatin CPUs

Joseph Smith joe at settoplinux.org
Fri Mar 5 13:05:57 CET 2010

On 03/05/2010 03:03 AM, Mark Marshall wrote:
> On 04/03/10 13:10, Joseph Smith wrote:
>> On 03/04/2010 07:38 AM, Joseph Smith wrote:
>>> On 03/04/2010 07:30 AM, Uwe Hermann wrote:
>>>> On Thu, Mar 04, 2010 at 10:05:57AM +0000, Mark Marshall wrote:
>>>>> On 03/03/10 04:19, Keith Hui wrote:
>>>>> The first problem is that this motherboard only has three DIMM
>>>>> slots. This means you have to set SDRAMC to something different;
>>>>> 0x0103 works for me.
>>>> Hm, seems to be determined by SDRAMPWR + MMCONFIG, and MMCONFIG
>>>> seems to
>>>> be a hardware-strap (so we can check it), but not sure about SDRAMPWR.
>> >>>
>> I think a simple SPD probe would work, if the correct value is returned
>> you know you have memory in that slot, otherwise if 0xff is returned
>> then no memory is present. Do this probe for as many slots as the 440
>> supports. Then set your registers based on that.
> The issue here is the number of DIMM slots on the motherboard, not the
> number of sticks in the slots. Some 440BX boards have four slots, while
> others only have three.
> MM
That is fine. Then if 440bx datasheet says it supports 4 slots, then 
that should be the standard.

Joseph Smith

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