Hi Finn,
Here's the video of the boot up sequence:
http://www.vimeo.com/1541660
You can see the odd PMU errors that pop up during the boot.
Thanks,
J Silverman
--- On Sat, 8/16/08, J Silverman <g1powermac@xxxxxxxxx> wrote:
From: J Silverman <g1powermac@xxxxxxxxx>
Subject: Re: Known working 2.6 kernel config for m68k Mac
To: "Finn Thain" <fthain@xxxxxxxxxxxxxxxxxxx>
Cc: linux-m68k@xxxxxxxxxxxxxxx
Date: Saturday, August 16, 2008, 5:43 PM
Hi Finn,
I got an interesting development. I found out that I
don't have the proper cable to do the serial port setup,
so, while waiting for the cable, I went searching to find a
way to get the kernel to either stop or pause at each
printk. I found there's an option in the Kernel Hacking
section of the kernel config to allow for delays in between
each boot message. You basically tell the kernel how much
time you want from the kernel command line, and it will then
pause at each message. After messing with a slight
documentation error with EMILE, I was finally able to get
the delay working. Now this is the amazing part; with the
delay, the machine didn't shut off. I saw a batch of
errors with the PMU, so it's definitely coming from that
driver. What I'll do, so you guys can see what I'm
seeing, is video tape the powerbook's screen while it
boots. I know it's not the best method, but it should
give you guys an idea as to what's going on until I get
the
proper cable.
Thanks,
J Silverman
--- On Fri, 8/15/08, Finn Thain
<fthain@xxxxxxxxxxxxxxxxxxx> wrote:
From: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
Subject: Re: Known working 2.6 kernel config for m68k
Mac
To: "J Silverman"
<g1powermac@xxxxxxxxx>
Cc: linux-m68k@xxxxxxxxxxxxxxx
Date: Friday, August 15, 2008, 11:01 PM
On Fri, 15 Aug 2008, J Silverman wrote:
...
Now I got some interesting news. I took Stephen
Marenka's config for a
2.6.25.2 kernel and chopped out just enough to
squeeze
the kernel on a
single floppy. And guess what? It actually
booted!
Well, sort of.
Nice!
The kernel messages started scrolling like normal
then
the whole machine
spontaneously shut off. I seen this happen once
before when I had the
fpu emulation option turned on. So I turned it
off
and tried again.
This time it didn't boot. It stopped at the
same
place as before.
I wonder if it is possible to build a kernel having no
FPU
emulation and
containing no FPU instructions.
CONFIG_M68KFPU_EMU_ONLY
depends on
CONFIG_M68KFPU_EMU...
I'll hope to be able to give more debugging
information soon. I'll be
setting up a serial cable shortly. By the way,
do you
know what the
settings I need to set on the other mac to read
the
powerbook's serial
port?
You get to choose those settings. The command line I
gave
has "9600n8"
meaning 9600 baud, no parity, 8 data bits (and 1 stop
bit).
Which is
probably the default anyway.
BTW, this is purely for debugging. The driver for the
userland /dev/ttyS0
device (e.g. for serial console login) is not
available
(though we could
probably use the powermac zilog driver).
Finn
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