circuit-announce — Announcements of Logisim developments - average < 1 message per month

[Logisim] SIGCSE panel invitation

[C B. <dr....@gm...>]

To Logisim mailing list subscribers:

I am seeking instructors to serve as members of a panel on the topic of
"Logic Circuit Simulation in the Classroom" at the SIGCSE conference on
computer science education in Raleigh, North Carolina, from February
29 to March 3, 2012. Though of course Logisim would be one possible
tool discussed here, I would particularly welcome contributions from
people who use other logic circuit simulation tools.

If you'd like to participate, please let me know by 5pm, Thursday,
August 25th; I just need your name and a very brief description of
your perspective in one or two sentences, including the name of the
institution where you teach, the course(s) where you use logic
circuit simulation, and perhaps anything unique to how you use it.
If there are many people interested, I'll select three other panel members
(with an eye primarily toward a diversity of perspectives); and we'd
work toward putting together a 2-page proposal by the conference
deadline, Friday, September 2nd.

Please note that any participants would need to be able to register
for the conference, attend it (with all the financial commitment
this entails), and present a prepared presentation on the topic for
12 minutes or so at the conference. Thanks for your consideration!

-Carl

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[Circuit-announce] Logisim 2.7.1 fixes bugs, improves file handling

[C B. <dr....@gm...>]

Logisim, a graphical design and simulation tool for logic circuits, is
now at version 2.7.1. This release's primary purpose is to address
several issue discovered since 2.7.0 was released two weeks ago.

One of the primary bugs addressed in this release is one where a user
could inadvertently change a component's attribute to an invalid
value. The circuit would typically continue to work normally, but when
the file is later reloaded, the file would refuse to load. This
release repairs the cause of the invalid value assignments; and it
enhances the file-loading process so that a dialog box appears
explaining any problems found, and the portion of the file that could
be interpreted is still loaded.

Another issue found in 2.7.0 was in the behavior of the transistors.
In particular, a transistor would "convert" a floating (Z) value into
an error value when told to transmit its source input; now, floating
values are transmitted as floating values.

Besides addressing many other issues besides these, this version also
adds a "Select Location" attribute to the multiplexer, demultiplexer,
and decoder, allowing the user to configure where these components'
select (and enable) inputs are located relative to the component.

Finally, this release marks the introduction of a mailing list where
users can subscribe to hear about new developments regarding Logisim.
We promise that the traffic on this list will average below one
message per month. To subscribe, go to
https://lists.sourceforge.net/lists/listinfo/circuit-announce

Educational institutions around the world use Logisim as an aid to
teaching about digital logic and computer architecture. As a Java
application, Logisim can run on most major operating systems. Read
more about Logisim at http://www.cburch.com/logisim/, and download it
from SourceForge.net at http://sourceforge.net/projects/circuit/.