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In article <12350@netnews.upenn.edu> pakman@scrolls.wharton.upenn.edu (David B. Pakman) writes:
>Has anyone heard of LogicWorks for the Macintosh?  It is a digital
>circuit simulator, not unlike DigSim, archived at sumex.
>Any comments?  I am looking to evaluate any digital circuit
>simulators, emulators, or design tools available.

I found laying out circuits in LogicWorks to be too much work.  You've
got to lay out all the components, then route all of the wires yourself
(every little corner you care to turn)  It's far too easy for crossed
wires to become logically connected, and several cycles of deletions and
additions seem to confuse it--some wires become connected internally, though
the display shows them unconnected.  Usually, at that point, you've start
up a new worksheet, and rebuild the circuit...

Also, there isn't a whole lot of debugging support.  You can start and
stop the circuit.  That's it.

It seems to me that a program of this type should allow multiple views of
the circuit, I remember spending a lot of time scrolling around, or adding
some wires and logic probes to bring all of the relevent signals and switches
onto one screen.

Also, the component library is rather small (though it does have a way
to add "libraries" of black box components)

Finally, the hardcopy output is horrendous.  Black box components from
"libraries" are bitmapped objects.  Single wires can become disconnected
on the printout.

This may seem harsh:  other people seemed to think it was the next best
thing to sliced bread (oohh, what an awfull cliche...)  But some of these
complaints were in common.

Sam Paik
d65y@vax5.cit.cornell.edu

p.s.  I used it in a class here at Cornell.