Hello,
Someone earlier got similar problem. Asus is muxing the devices on the SMBUS. I'm developing drivers for lm_sensors project. (W83785 driver) I got my smbus working (same as SiS645) There are some devices on the bus - ATXP2, W83785 and some Asus ASIC. But no SPD EEPROM, nor PLL. I'm curious about the content of my SPD.
Someone here pointed out that it can be enabled by some of GPO bits.
I got 2 problems.
1) I dont have a datasheet for SiS745 (I ot only for SiS630) 2) I dont know which GPO to enable.
Please would someone be so king and give me some advice?
I got disassembled BIOS for reference, but I even dont know in wich PCI dev should I look for GPO.
You will need this information anyway if you plan tu support this motherboard :) (it will be very nice)
Regards
Rudolf Marek
to figure out which GPIO to do, you have to program each GPIO in turn and then read SPD, and see when it changes. Painful but it doesn't take too long.
ron
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ron minnich -
Rudolf Marek