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Re: gEDA-user: Split ground planes and zero ohm jumpers





On Apr 8, 2011, at 1:13 AM, Stephan Boettcher <boettcher@xxxxxxxxxxxxxxxxxx> wrote:

> rickman <gnuarm.geda@xxxxxxxxx> writes:
> 
>> I have to say I am philosophically opposed to any feature that allows
>> a design to pass DRC when the layout differs from the schematic.  
> 
> Just to get the terminology right:
> 
> DRC has no business to care about the schematics at all.  There shall be
> a tool to check if the layout implements the schematics netlist, but
> that is a different issue.
> 
DRC vs ERC. 

A while back I proposed that there were object attributes that allowed for a single connection from a net.  If the ERC caught more than one connection from that net.

> PCB implements this distiction properly.  DRC checks consider coper
> structures as layed out when evaluating the rules, without regard to the
> netlist.
> 
> The Rat's-nest (O-key) ignores DRC rules when checking connectivity.
> 
> -- 
> Stephan
> 
> 
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