> RA0 |\/| RB7            RA0 |\/| RB7
> RA1 |  | RB6            RA1 |  | RB6            (these are just for
> RA2 |  | RB5            RA2 |  | RB5             illustration only)
> RA3 |  | RB4            RA3 |  | RB4
> etc
>
> So things don't line up nice. I'd like to avoid a huge copper trace
> spider's web trying to fix that.

That will hardly be a "huge copper spider web".  This sort of thing goes
on all the time during routing.  Unless they are partcularly sensitive
signals (and it doesn't seem that way from your description), don't worry
about it.  Just let the auto router do whatever it does.  Most likely the
signals will get routed via even more convoluted paths than what you
envision.  Big deal.  It's all handled by computer.  It might make a
ratsnest, but it won't mess up the connections.  Spend the extra time
worrying about good grounds instead.

Note that there are cases where this relaxed attitude is inappropriate,
but it doesn't seem like this is one of them from your description.

> I'd even thought about rotating one chip 180degrees,

I'd only consider that if the reduction in complexity made the difference
between a routable and unroutable board, or the signals were very
sensitive.  Otherwise, someone isn't going to notice one IC is reversed
from the other and one of them is going to get installed backwards.


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