Panic: Lock Loop On Inserting Disk2.vd.

[forsyth@plan9.cs.york.ac.uk forsyth@plan9.cs.york.ac.uk]

i've seen this on two machines that had incorrect BIOS advanced/chipset
parameters (including the one i'm using now).  the BIOS default parameters
were definitely wrong for my configuration -- they worked, but
assumed rather slow memory -- but my first attempts were too optimistic

the system got all the way through termrc but blew up with a lock loop
when starting all my windows in 8½.  i suspect that the lock word flushed
from the cache didn't make it to memory because the memory write time allowance
was too low.  i added another wait state and it has been fine since.
the little handbooks that come with
the motherboard rarely give enough information to allow you to work out the
correct values to use.
the m/b i'm using now comes with better documentation than most, but
it still wasn't enough.
proper computers are designed to support a particular combination of things,
with fairly tight limits; the average PC motherboard and chipset must accept
almost anything, hence all the options.

i don't suppose there is a document on the net somewhere about these
settings, written by someone who knows?