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Subject: Re: [geda-user] Project leadership (design error in the core of
 gschem)
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From: John Griessen <john AT ecosensory DOT com>
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Date: Tue, 29 Dec 2015 12:55:32 -0600
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On 12/29/2015 11:29 AM, Ozzy Lash (ozzy DOT lash AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> In places were slotting could be cool we don't use it right in the
> standard symbol library. Take the symbols for the larger xilinx chips.

Slotting is intended for chip ins and outs that cannot change, so FPGAs are not a good example.
FPGAs are very regprogrammable as far as which pin/pad/ball does a particular internal function.
They don't need slots -- at least not classical slots.

What would be good for FPGAs is a quick/easy way to change pin numbers of a symbol,
and simultaneously  update the netlist to match that same function without having to undo gschem nets
that are already connected to that place.  (A place that just got a pin swap or several done on it)