Messages in this thread | | | Date | Mon, 20 Jun 2005 19:04:35 +0200 | From | Lenz Grimmer <> | Subject | Re: [ltp] Re: IBM HDAPS Someone interested? |
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Hi,
let me add my 2 cents here, as I have been toying around with this idea, too..
Vojtech Pavlik wrote:
> Indeed, but there is a zillion of different approaches to an A/D. I'm > quite sure IBM have rolled their own directly on the mainboard. > > The main question is on which bus and which address it lives and what > is the programming interface. It's not something Analog Devices would > know. > > It can be on some monitoring chip living on the SMBus (most likely) > or coupled directly to the ACPI bridge on PCI, or anywhere else in > the system.
I tried monitoring the output of the embedded controller register dump that the "ibm-acpi" kernel module provides, using the following command and then moving the Laptop (Thinkpad T42) to trigger changes:
watch -n1 cat /proc/acpi/ibm/ecdump
Alas, there wasn't really a pattern that convinced me that the chip actually is monitored via this controller. But of course it may not harm if somebody else double checks this.
> Well, some piece of software needs to park the HDD when the notebook > is falling, and that piece of software should better be running since > the notebook is powered on. Hence my suspicion it's in the BIOS. It > doesn't have to be visible to the user, at all.
On Windows, you need to run a separate tray application that enables the protection. So it seems like it's implemented in "userspace". It may be worth debugging what this Window applet actually does...
Bye, LenZ - -- - ------------------------------------------------------------------ Lenz Grimmer <lenz@grimmer.com> -o) [ICQ: 160767607 | Jabber: LenZGr@jabber.org] /\\ http://www.lenzg.org/ V_V -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
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