If your on Unix box using >diff   >awk
> grep can create lists of netlist differences..
Lou

> 
> The problem of determining the differences in netlists is compounded
> by the issue of component renumbering.  For example, if in the old netlist
> U1 pin 3 connected to U6 pin 2, and this net remained unchanged as far
> as connectivity is concerned but the board was renumbered such that U1
> is U2 on the new board and U6 is U7.  If you go by the reference designators
> this would be flagged as a change, but in terms of connectivity it in fact
> is not a change.  A program to determine netlist changes would have to
> build a connectivity list and link this to the generic or function name
> of the device (ls00 for example).  You would have to build a two lists of 
> functions and pin numbers that are tied together, one for each board, then
> compare them.
> 
> Depending on your cad system, it may be easier to extract this data from
> your pcb database than to use the actual netlist.  If you are using Cadence
> Allegro I am sure it can be done this way, otherwise I suggest that you
> contact an AE or some other knowledgable person.
> 
> Anyway, that's my two pennies worth.
> Ken Barrett
> Cisco Systems WBU
> San Jose CA
> [log in to unmask]
> 408.526.5625
> 
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