SPD problem

[Charlie Song]

Hi all,

I'm trying to use "scanspd" to read SPD. It works fine for some motherboards. But it read back 0s for other motherboards.

Does that mean I cann't read SPD for some motherboard?

Thanks,

Charlie

[Ronald G. Minnich]

On Wed, 12 Mar 2003, Charlie Song wrote:
> I'm trying to use "scanspd" to read SPD. It works fine for some
> motherboards. But it read back 0s for other motherboards.

some motherboards have two I2C bussees, one for SPD and one for sensors. 
The BIOS uses the I2C bus for SPD, then sets a register so that the I2C 
can only be used for sensors.

The ASUS CUA works this way. The result is that you have to find the 
hardware that sets the register and change it for SPD.

ron

[Charlie Song]

Thanks ron.

I has another problem with reading SPD. I'm using ASUS P4B533-V motherboard.
I couldn't get the VID and DID of 82801DB. And of course, I could not read
the SPDt.

How can I fix it?

Charlie

----- Original Message -----
From: "Ronald G. Minnich" 
To: "Charlie Song" 
Cc: 
Sent: Wednesday, March 12, 2003 6:34 PM
Subject: Re: SPD problem
> On Wed, 12 Mar 2003, Charlie Song wrote:
> > I'm trying to use "scanspd" to read SPD. It works fine for some
> > motherboards. But it read back 0s for other motherboards.
>
> some motherboards have two I2C bussees, one for SPD and one for sensors.
> The BIOS uses the I2C bus for SPD, then sets a register so that the I2C
> can only be used for sensors.
>
> The ASUS CUA works this way. The result is that you have to find the
> hardware that sets the register and change it for SPD.
>
> ron