Re: gEDA-user: 74xx series

[Karel Kulhavy <clock@twibright.com>]

On Fri, Jun 25, 2004 at 02:13:09PM +0200, Magnus Danielson wrote:
> From: Dan McMahill <dan@mcmahill.net>
> Subject: Re: gEDA-user: 74xx series
> Date: Thu, 24 Jun 2004 20:53:16 -0400
> Message-ID: <20040625005316.GA3237@bondage.mcmahill.net>
> 
> Dan,
> 
> > On Fri, Jun 25, 2004 at 02:47:48AM +0200, Paul Surgeon wrote:
> > > How does one wire up the power on the 74xx series of chips in gschem?
> > > There are no power pins on these logic ICs.
> > 
> > see http://www.geda.seul.org/docs/20040111/netattrib/index.html
> > 
> > personally I think implicit connections are EVIL, but that is
> > a religous war.
> 
> They are not only evil, but they are becoming "A really bad thing" now that we
> have chips with core voltage, various different IO-voltages and where important
> system properties is decided on this. Also, even for the same voltage each
> power-pin may require special care just as much as the signal-carrying pins.
> 
> I think it should be phased out as the main principle, but for some designs
> you may still consider it usefull.

I have had some problems with implicit connections on Ronja.

What's the alternative for implicit connections? Each gate symbol with power
pins? Or 7th gate that has power and gnd pins?

Cl<