Re: serial console, was Re: d-i built (but not tested)
On Fri, Aug 12, 2011 at 10:37:20PM +1000, Finn Thain wrote:
> It is wierd, but I think that the powerbook PMU chip will respond to
> certain CPU exceptions this way. I've seen powerbooks respond to initramfs
> like this before but I don't think I ever found out why.
The basic idea is that any time the PMU thinks you aren't following the
right communication protocol (including the timing between messages) it
will just shut off because it thinks the OS crashed. So if it is in a
multi-message handshake and something disables interrupts for too long,
the system will just power off.
It makes for tons of fun. I haven't done much with the one m68k PowerBook
I acquired due to lack of time, but it is not an easy platform to handle.
Brad Boyer
flar@allandria.com
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