On 07/09/2014 17:32, Jason White wrote: > On Sun, Sep 7, 2014 at 1:19 PM, wrote: >> I suspect that you will find free/low priced/hobby packages have layer >> limitations because the underlying code to keep track of everything on >> each layer becomes a big mess if not well designed. Once to get to >> 'serious' packages that cost significant money you can do anything with >> them from laying out silicon for ICs to multilayer PCBs where >> manufacturing technology of the boards sets the maximum layer limits. > While I agree commercial software is much better suited for doing 12 laye= rs, > I know for a fact the gEDA supports an unlimited number of routing layers= .. > It is controlled by a compile time variable that is set to 8 by default. > Unfortunately, it does not support blind vias, which I have to imagine is > a show stopper on high layer count boards. > > I don't know how it is for KiCad, but I have to imagine that it is a simi= lar > story. KiCad is capable of up to 32 layers, it uses a long int bitmap to map layers. Non-signal layers count too. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .