Contents of s2ibis2_NT

  00readme.txt   This file

  s2ibis2Win95.zip  Windows 95/98 Version
  s2ibis2WinNT.zip  Windows NT/2000 Version

THESE UTILITIES work only with Avanti HSpice

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readme.txt for s2ibis2Win95.zip

Readme		-	This file
s2ibis2.exe	-	spice to ibis2 compiled for Win95
cygwin.dll  -	required dll file
hspice.bat	-	batch file to call hspwin
hspice.pif	-	pif file to cause batch window to exit 
			after execution
removePts.txt	-	Word 97 macro to remove all but 100 points
			from waveform tables

All three files can be place into any pathed directory.
The Windows directory works well.
Make sure that hspwin.exe also resides in a pathed directory.

To run s2ibis2, open an msdos window.
Change directory to the directory where the
.s2i file is located.

Run s2ibis2 as usual. (i.e. s2ibis2 filename.s2i)

This compilation of s2ibis2 contains several extensions of the
original code: 

First, the resolution of all data placed in 
the ibis file has been increased to 5 significant digits after
the decimal place.  This resolves problems with slowly changing
values which could previously cause "flat" I/V curves that are
not acceptable for most simulators.

Second, 251 waveform table data points are produced.  This 
enhancement provides higher resolution reproduction of rising
and falling edge waveforms.  The previous code only produced 
51 points, including zero.  If the waveform simulation time
was set to 10ns, only 200ps of resolution would be achieved.
The change allows for 40ps resolution of waveform tables with
a 10ns simulation duration.  However, this is in violation of 
the IBIS specification which allows for only 100 waveform points.
Some current simulators will allow for more points than the IBIS
standard.  Others will reject these as errors. (The authors simulator
of choice will allow for waveform tables with more than 
100 points, and in his opinion 100 points are not sufficient for
many devices.)

Third, a compilation dependent bug in the code has been fixed
which would cause incorrect load and fixture connections to be
made in waveform table spice simulations.

For those who have simulator imposed waveform table point limitations,
I have provided a Word 97 macro which can be used to  reduce the
table size from 251 to 100.  This macro leaves the first 75 points
intact (to maintain the high turn-on edge resolution) and then 
removes all but 25 points from the remainder of the table.

Regards to all s2ibis2 users,

Scott McMorrow
SiQual
scott@vasthorizons.com  (new e-mail)

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readme.txt for s2ibis2WinNT.zip

Here is a newer compiled version of s2ibis2 which runs on winNT and
2000, along with a batch file.  You may have to alter the batch file
in order to get it to run if you are using Win95 or 98, since some of
the batch file syntax is different.  You will also need to set an environment
variable to point to version of hspice you are using and possibly to
change some of the paths.

This version was recompiled with Microsoft C and has not had issues
on any platform that I know of.

Also, I have added some enhancements into the code to create
tables with better decimal precision and waveform tables with
250 points.  This makes the waveform tables non-compliant with
the ibis spec and will cause the ibis checker to flag them as errors.
However, many simulators do not mind and will allow tables with
a larger number of points, which gives greater accuracy to the
simulations.

Please note that this version supports only the launch of Avant! HSPICE.
None of the other Spice simulators are supported or work with this version.

________________

You must also download the following file under eda.org:

  /pub/ibis/s2ibis/s2ibis2_v1.1/s2ibis2.tar.Z

to get the documentation files and sample files that are
needed for using files in this directory.