[SOUND]. 
Hi. 
This is Nick Chen, one of the teaching 
assistant for Rob Rutenbar's VLSI CAD 
Logic to Layout course. 
This is the third tutorial in a series of 
video tutorials introducing you to 
several tools that you can use in this 
class. 
Today, we will be talking about espresso. 
Espresso is a two level logic 
optimization tool developed by 
researchers at Berkeley. 
It is a hugely successful optimizer. 
It is the tool that pioneered the, as 
usual, this video tutorial has a 
accounting document, which will be made 
available on the class website. 
We are going to use the very simple 
example in the middle of the screen here. 
As Rob has mentioned in document, these 
comments are not actually valid ESPRESSO 
syntax and have to be removed before you 
actually type this in and send it out to 
the servers. 
I also want to point out that even though 
this example that we were using is small, 
you have the opportunity to try out 
larger examples. 
In addition, we have a lot of reference 
material for you right now in this 
document. 
In particular, we have the Espresso main 
pages to the end of this document. 
It is really detailed. 
It expresses everything that you can do 
in the Espresso file format, and there 
are a lot of examples that you can go to 
and try out for yourself. 
So, here are the contents of the simple 
example that we have in the tutorial. 
I've just copied and pasted here, and 
remove all the comments. 
So, I've saved the file, and we're going 
to do the usual of uploading it to the 
class website. 
Go to the class website, scroll down to 
Programming Assignments. 
Go to Tools. 
And you can see Espresso at the bottom. 
Click Submit. 
Choose the file. 
Click Submit. 
Now, they just say that your submission 
has been accepted and will be graded 
shortly. 
So, just go back to the previous page. 
And after a while, you should be able to 
see your feedback. 
And here's the output for the particular 
run. 
As you can verify, it's going to match 
the output that we have in the tutorial. 
Some of you may be wondering whether it 
will be possible to download Espresso on 
your machines to install, just like what 
you could have done for mini set. 
The answer is yes, you can go to this 
particular website. 
It's the SIS 1.3 distrubustion. 
Even though is says SIS here, Espresso is 
going to bundle this part of the 
distribution. 
SIS is another tool that we'll be 
introducing next week. 
And there you have it, a very short 
introduction to using Espresso through 
our class website. 
As usual, let us know if you have any 
comments or feedback to the discussion 
forums. 
Thank you.