[comp.lang.vhdl] EIA/IEEE logic modeling standards

rayv@revenge.oakhill.uucp (Ray Voith) (05/17/91)

Hopefully this will not appear twice - I previously
posted it to the wrong news category.

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I am looking at the EIA/IEEE logic modeling packages.

I am a little confused, since I thought that there would
be only one resultant package that both agreed upon.  I
have two apparently different VHDL packages:  One from
Len Finegold (EIA) and one from Victor Berman/W. Billowitch
(IEEE).  They are different.  I have not examined them in great
detail, since I am not sure whether the intent is to have only
one package eventually.

I am wondering if anyone out there has an answer to the questions:

	- is one a subset of the other?
	- are they compatible but different internally?
	- what supporting stuff is safe to use with both?

The point is that if they are not the same, and have different
supporting packages (e.g. TIME_FUNCS), then it is unclear which
one is the industry standard.  It is also unclear which supporting
code will work with which package.

Thanks for any help on this.

I am sending a copy of this note to Finegold and Billowitch.

Ray Voith   rayv@revenge.sps.mot.com   512-891-2265

berman@pebbles.cadence (Victor Berman; x6276) (05/25/91)

The IEEE package is currently the one being looked at as the standard.  The
EIA has agreed to track the IEEE package and divide out those functions which are
not in common into a separate package which will be supplied as a sort of
recommended tool kit but not as part of the required standard.  The issue
of the don't care state which is currently in the IEEE but not in EIA is
still not entirely resolved.  The EIA feels that this state is not appropriate
for actual parts models and may stick with a sub-type excluding this state.

Victor Berman
berman@cadence.com