🚀 go-pugleaf

Subject: Simulation questions on Magic cad tool
Newsgroups: sci.electronics
Organization: Mount Holyoke College
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I hope this is a good place to ask about Magic cad tool, but I am trying 
anyway. What I have got to in the simulation program irsim is, I am 
able to run the simulation of Tut11a module. But when I called up my
own cell which I just drew up( a simple NAND gate), I first wasn't sure
about how to create a .cmd file(is this a necessary step at all?), so
I looked at tut11a.cmd and copycat a file NAND.cmd, then come the 
hard part:

irsim>@ NAND.cmd
irsim>h input1    *input1 is a vector I defined signifying one of the inputs
irsim>d            *display node value

what I saw next is a line with input1=X, which shows that the value is
still undefined (X) even though I have assigned it to be 1 with"h input1".
I am quite puzzled by the ineffectiveness of the command, it makes me
wonder whether in the right track. Please let me know if you have a clue
about this.  Thanks.

--Tian
email address: tgzhang@mhc.bitnet