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Date:	Sun, 29 Jul 2012 09:40:04 -0400
Message-ID:	<CACPio-4R9b7P242BZmXd+sNBTULDNdRrDPuOnFD9UQoOV8ippA@mail.gmail.com>
Subject:	[geda-user] override attributes, slots in hierarchical schematics
From:	Nathan Stewart <therealnathanstewart AT gmail DOT com>
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com

From eons ago:  "Once it is possible to override arbitrary attributes
nested within a sub-circuit, it will be as simple as resetting the
slot=xxx attribute down inside the sub-circuit for each instance you
have. "

Unfortunately, there's a boatload of ancient stuff about geda floating
around, and sometimes the search engines seem to prefer the old
archives.

What's the current state of overriding attributes? At the moment I've
used a dual opamp rather than a quad, simply because it means my
circuit repeats that better suits geda. I experimented with a
subcircuit-a,  subccircuit-b so that I could better facilitate
slotting 2 of the 4 opamps. But it occurs to me that once I start PCB
layout - it'd be a mental health saver if it were easy to  flip slots
around to better suit layout in instances

In this case, I have a repeating filter subcircuit that uses two
opamps, there are seven occurances of this subcircuit.  They come off
a DIN-13 connector, with a few other  signals that will be  buffered.
So in addition to the two slots used per filter, there's likely to be
left side / right side layout slotting differences.  So for any
attribute overriding mechanism, I'm trying to think out loud how you
could accomplish this. (overriding slot for sub-U1a, sub-U1b from a
subcircuit instance)

So is there a good way to accomplish this currently?

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