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Date: Wed, 14 Nov 2012 11:41:56 -0500
From: Joshua Lansford <Joshua DOT Lansford AT laserlinc DOT com>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] slotting
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On 11/14/2012 10:55 AM, Peter C.J. Clifton wrote:
> In the gEDA world, this isn't slotting per-se, but having multiple 
> symbols to connect different parts of a complex chip is common practice.
>
> What I would do is to ignore slots, and make two separate symbols (if 
> you want to separate transmit and receive). Each will be instantiated 
> with the same refdes (e.g. OPTO1 or something like that), and the 
> netlist will "just work". Each symbol can just use the pins it requires.
>
> This probably won't play well with the renumber tools out there, and 
> I'm not sure it is a good idea to try and trick them by invoking 
> slotting. 

Just for the record, refdes_renum_slots intentionally support this too.  
I have an FPGA in which is split into multiple banks.  If --force is 
specified on refdes_renum_slots, any symbols in a group stay in the same 
group even if it gets assigned a new refdes number.  Then gattrib_csv 
can be used to edit the properties of the FPGA using LibreOffice and 
when imported back in it duplicates the data into every symbol (bank) in 
the group.