Why cann't I read SPD for SiS 745 chipset?

[Charlie Song]

Hello,

I'm trying to read SPD of DIMM on a motherboard with SiS745 chipset. But I cann't read it. I've checked the ACPI enable bit. It is 0xD8. The ACPI Base Address is 0xE400.

Can anyone help me to fix the problem ?

Thanks,

Charlie

[ollie lho]

On Thu, 2003-03-27 at 23:43, Charlie Song wrote:
> Hello,
>
> I'm trying to read SPD of DIMM on a motherboard with SiS745 chipset.
> But I cann't read it. I've checked the ACPI enable bit. It is 0xD8.
> The ACPI Base Address is 0xE400.
>
> Can anyone help me to fix the problem ?

do you have the register spec for 745 ? What program do you use to
read the SPD ?

[Charlie Song]

Ollie,

I don't have the register spec for 745. I just refered from 735. What's
different for ACPI enable  and address between 745 and 735?

I'm working on a ASUS motherboard - A7S333 to try to read SPD of the DIMM
for memory test purpose. Could you help me to find a way to realize that?

Thanks,

Charlie

----- Original Message -----
From: "ollie lho" 
To: "Charlie Song" 
Cc: "LinuxBIOS Mailing List" 
Sent: Thursday, March 27, 2003 8:54 PM
Subject: Re: Why cann't I read SPD for SiS 745 chipset?
> On Thu, 2003-03-27 at 23:43, Charlie Song wrote:
> > Hello,
> >
> > I'm trying to read SPD of DIMM on a motherboard with SiS745 chipset.
> > But I cann't read it. I've checked the ACPI enable bit. It is 0xD8.
> > The ACPI Base Address is 0xE400.
> >
> > Can anyone help me to fix the problem ?
>
> do you have the register spec for 745 ? What program do you use to
> read the SPD ?

[ron minnich]

On Fri, 28 Mar 2003, Charlie Song wrote:
> I'm working on a ASUS motherboard - A7S333 to try to read SPD of the DIMM
> for memory test purpose. Could you help me to find a way to realize that?

uh oh, ASUS. They have a habit of making TWO I2C busses, and one is used 
for SPD. You have to figure out how to turn that on. See the ASUS CUA port 
for an example.

ron