exxos's Atari, Amiga & retro forum

For all you kicad experts out there. I'm attempting to layout a simple board that makes a board to convert a 28 pin prom foot print to a 32 pin PLCC. Really simple starting project.. nope.. kick my arss. It thinks i'm tying to tie together 2 eprom and says the lines are not driven. How do I tell the #$## the 28 pin device is just a plug? Play no attention to the circuit, I just want to get through the kicad proccessand then I'll get the electronics right.

I never used it, but what lines it it saying are not driven ?

Every where theres an arrow. Heres a subset of the issues. All warnings? Is this something you just ignore?

are you sure the nets are actually connected ? If you can move the IC the nets should follow the IC.. if they don't, the nets haven't connected...

Eagle does that all the time, drives me nuts!

Yes ,there's no errors, it will let me go onto the layout program. Guess its just like the warnings some c compilers throw out. Guess for now I'll ignore them since their just warning. :)

What version of KiCad are you using? It looks and sounds odd to me...

Its the latest version for the mac. Going to forge ahead since its just calling them warnings.. There's a pyramid of settings that determine what's reported, what's warnings, and what's errors. Down the road I'll play with that but now I want to get through the process.

This is normal KiCAD behaviour. The warnings are originating from the ERC (Electrical Rules Checker).

From KiCad's point of view, you just wired two ROMs together which doesn't make sense. You can either ignore the warnings (not advisable since the ERC is usually really helpful to alert you of e.g. unconnected wires) or make KiCad aware that your pins are indeed off-board connections.

You could - for example - replace your 27C256 with two 14 pin connectors or - probably a bit misleading - edit a copy of it in the library editor and make all its pins "passive" (connector pins have this attribute by default).

To understand the ERC rules, go to "Tools->Electrical Rules Checker -> Options" and play with the rule settings.

Eagle has similar warning for this. I just go in the ERC and mark them as approved.
I was going to check Kicad soon (on OS X too) and hope there is a way to do something similar.

Yes, its what I suspected after playing around a little. For now I'll just leave them as warnings and forge on. Thanks for the assistance. I'm sure I'll have additional questions.