On Mon, 4 Feb 2008, Stuart Brorson wrote: > > I did "grep -Ri vdd *" in the base directory of symbols. > > > > I noticed the "net=Vdd" thing, but in connection with something weird in > > 4000/. All of these symbols include a "net=VDD:??" statement. > > Does anybody use 4000 series CMOS anymore?
They're the 4016 (Quad analogue switch) and the 4052 (Dual 1/4 CMOS MUX). Can you can suggest suitable 74xx series equivalents? I'm working from a 10-15 year old schematic. > But no matter..... these net= callouts are attaching the net VDD to > pin ??? IIRC. I'm not sure what this would do to your netlist if you > put one of these in your schematic and tried to netlist it. Nothing > good, I suppose... > > Your best bet is to fix this callout if you are using a 4000 series > part. "fix this callout"? What do you mean? > > This created an interesting problem with power/vdd-1.sym which has > > "net=Vdd:1". These statements are not case-insensitive. > > If you are using the vdd-1.sym symbol in your design, then this > attribute is creating a global net called Vdd, whether you want it or > not. If you want this, that's fine. If not, then you need to change > the name of the net to your desired netname, e.g. "net=mynetname:1". Right, but there was the bizarre effect of some object containing net=Vcc:? and net=Vdd:? somewhere, but disappearing when the Vcc and Vdd symbols were not used. That made me suspect there's a problem in the interpretation of the symbol files, not in the symbols themselves. > > Now, in retrospect regarding the request for manual critique, I think > > there ought to be a chapter specifically on the proper use of symbols in > > power/. > > You're likely doing it right. The problem is that some of the symbols > have junk in them which doesn't belong. This is an issue with heavy > symbols. Caveat Emptor. Ah... So perhaps I should ask for write access to the CVS to go through and fix this? There are loads of other goofs I keep stumbling over in the standard symbol set, which is part of the reason why I started making my own. -- David Griffith [EMAIL PROTECTED] A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user