gEDA-dev: [PATCH] GAF: Solve the "transistor problem"

[John Griessen]

John Doty wrote:

> Another way to solve this would be to allow multiple physical pin  
> number assignments to one graphical pin. That would simplify some  
> symbols, and allow one to switch from, say, a TO-3 to a TO-220  
> footprint without having to draw an extra pin and connect it up.
> 
> Another minor annoyance is that there are times when you'd like more  
> than one graphical pin to represent a single physical pin. One  
> example is the ASIC pads at  http://research.kek.jp/people/ikeda/ 
> openIP/openIP_2.pdf. The author drew two pins on each symbol, but  
> many of them have only one connection to the underlying circuit  
> (excluding global power and ground nets). His EDA system (Tanner, I  
> believe) supports this, but ours doesn't. Can't have the same pinseq  
> on two different pins.

I think this can be simplifying too.  Lets us use any style of drawing,
any simulator and match pins and ports and nets up, while separating
graphics from some attributes.

John Griessen
Ecosensory