ASB100 PWM

[vitalyb@mail333.com (Vitaly V. Bursov)]

On Tue, 11 Nov 2003 01:29:29 -0500
"Mark M. Hoffman" <mhoffman@lightlink.com> wrote:

> vitalyb wrote in ticket #1437:
> 
> > asb100??s chip address: 0x2d
> > pwm data address: 0x59
> > default value: 0x8f
> > 
> > lower nybble (with a mask 0x0f) regulates Power and Chassis Fans, but not a CPU
> > fan
> > 
> > it looks like if higher (7) bit is set, manual control is enabled, ie if
> > register contains 0x85 fan??s speed will be around 5/16
> > 
> > but if bits 5 and/or 6 are set and bit 7 is not, fan speed is constantly
> > lowering (approx. every 4 sec.)
> 
> So, I tried the attached patch (vs. current CVS) with no result here:
> modifying the pwm did not change any fan speeds at all.  But maybe
> there are different ASB100 revs?  Who knows?  The patch didn't
> seem to hurt anything, so if it works for you I'll commit it.

$ echo $[ 0x80 ] 1 > pwm1
It works for me! Thanks!


I have an Asus A7V8X mobo rev 1.04, ASB100 chip marking follows

ASB100-A    Bach
TPV268981   0240E

i2cdump`s output for banks 0-4 is attached.

And I checked a photo in the manual. It is a mobo rev 1.02
ASB100 marking:

ASB100-A    Bach
TKF100471AE 0227

Looks differently...

> BTW: thanks for the info... anything else you can find out about
> that chip, please email (sensors@stimpy.netroedge.com) us.

OK.

-- 
Regards,
Vitaly V. Bursov                    mailto:vitalyb@mail333.com
GPG Key ID: F95A23B9                http://www.gnupg.org
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