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From: abair@turbinia.oakhill.uucp (Alan Bair)
Newsgroups: comp.lsi,comp.lsi.cad
Subject: Re: Need help on Silos input commands ...
Message-ID: <ABAIR.89Nov21020934@turbinia.oakhill.uucp>
Date: 21 Nov 89 08:09:34 GMT
References: <10648@venera.isi.edu>
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Organization: SPS CAD, Motorola Inc., Austin, Texas.
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In-reply-to: sllu@jenny.isi.edu's message of 21 Nov 89 00:41:17 GMT

In article <10648@venera.isi.edu> sllu@jenny.isi.edu (Shih-Lien Lu) writes:

   I need to understand some SILOS input commands. Would
   any kind netter help me out? Thanks in advance.

   Please explain to me the following commands:

   .INIT M0101BXNORNG=1
This presets the node M0101BXNORNG to the value 1.  This is normally used to
avoid cycles or unstable states at startup.

   .SYMBOL R0=- R*=# R1=+
This defines the symbols in the output listings for various combinations of
signal strength and level.  R0=-: Resistive low signals display as "-".
Strenghts: S=Supply, D=Drive, R=Resistive, Z=High Impedance
Levels: 0=low, 1=high, *=unknown
Combinding these generates the 12 states that Silos supports.

   .CLKIN .CLK 0 S1 500 S0 3000 S1 3500 S0 .REP 500
The signal CLKIN(I don't think that 1st "." should be there) is driven by
the source with the described waveform.  The waveform is defined by pairs
of TIME and Strength/Level descriptions.  The .REP 500 indicates that the
pattern is to be repeated 500 times.  I can't remember if the entire pattern
is repeated or just part of the sequence is used.


   Shih-Lien
--
Alan Bair
SPS CAD                   Logic Simulation & Test
Motorola, Inc.            Austin, Texas
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