west@bnrmtv.UUCP (Andrew West) (10/21/86)
[ This line to appease the Great Line-Eater if he still lives ]
Has anyone heard of a program for the Mac which allows you to do state
diagrams/analysis and hopefully, simulation?
I have seen a program called "LogicWorks" but it looked rather limited
(very small 7400 library and could only simulate simple, unclocked state
tables).
What I am looking for is more of a "MacProject" of logic design in which
one could graphically describe a state diagram, moving around states at
will. I would then like to be able to specify the inputs to the state
machine for each clock period and, given an input clock and (programmable)
propagation delays, simulate the outputs.
It would be nice (but not vital) if I could also attach a few discrete
components (ala LogicWorks, hopefully with a more complete library) to the
inputs and outputs of the state machine to simulate a complete small
circuit.
I have heard of a few such programs for the IBM PC and, given the
graphics capabilities of the Mac, am surprised that I have been unable
to find a similar version for the Mac.
Please note that I am *not* looking for a high-powered, all purpose logic
simulator (i.e Mainframe) but rather a quick and easy method for
simulating small portions of a circuit with logic devices (PLA, PAL, etc.
registered and/or unregistered).
By the way, I have taken a look at the DigSim program that came across the
net a couple of monthes ago. Although it is a fun little program, it is
even more limited than LogicWorks, has no 7400 library (unless one spends
a great deal of time building it himself), no ability to alter prop delays
or handle glitches of under 10 ns and is not set up to handle state tables
directly. (No insult to the author. For a $15 Shareware program, it's
pretty good--just not for my puposes).
I'd appreciate any suggestions/information anyone could provide.
Andy West
{...hplabs, amdahl...}...!bnrmtv!west