On Wed, Jul 8, 2009 at 1:13 AM, Rudolf Marek r.marek@assembler.cz wrote:
Hi,
Please tell what superios are there. The pwrgood is sometimes involved. It looks like a SIO thingie.
smsc lpc47b397.
On Tue, Jul 7, 2009 at 6:17 PM, Carl-Daniel Hailfinger < c-d.hailfinger.devel.2006@gmx.net> wrote:
I have no idea if the reset button directly triggers a reset line or something similar on the processor, but it would be interesting to know:
- Does the power off also happen if you hold reset after the machine
has already been booted? (Do n seconds of reset always trigger a poweroff?)
No. After a few seconds of booting you can hold it in reset as long as you want. Since there is no output (no post codes either), I haven't been able to narrow it down.
What I'm hoping is that it is some setting that can be saved by the device for the next boot. Otherwise I have to figure out a workaround, since I can't access the SuperIO before HT is initialized, and I need to hold the board in reset before HT is initialized.
- Which part of the board reacts to the held reset line and triggers
the poweroff?
I don't know.
- Is reset maybe somehow coupled to PWRGOOD and holding down reset is
perceived as electrical problem of the power supply?
Since #1 is no, I don't think so.
Thanks, Myles