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[SOUND]. 

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Hi. 
This is Nick Chen, one of the teaching 

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assistant for Rob Rutenbar's VLSI CAD 
Logic to Layout course. 

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This is the third tutorial in a series of 
video tutorials introducing you to 

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several tools that you can use in this 
class. 

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Today, we will be talking about espresso. 
Espresso is a two level logic 

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optimization tool developed by 
researchers at Berkeley. 

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It is a hugely successful optimizer. 
It is the tool that pioneered the, as 

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usual, this video tutorial has a 
accounting document, which will be made 

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available on the class website. 
We are going to use the very simple 

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example in the middle of the screen here. 
As Rob has mentioned in document, these 

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comments are not actually valid ESPRESSO 
syntax and have to be removed before you 

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actually type this in and send it out to 
the servers. 

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I also want to point out that even though 
this example that we were using is small, 

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you have the opportunity to try out 
larger examples. 

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In addition, we have a lot of reference 
material for you right now in this 

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document. 
In particular, we have the Espresso main 

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pages to the end of this document. 
It is really detailed. 

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It expresses everything that you can do 
in the Espresso file format, and there 

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are a lot of examples that you can go to 
and try out for yourself. 

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So, here are the contents of the simple 
example that we have in the tutorial. 

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I've just copied and pasted here, and 
remove all the comments. 

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So, I've saved the file, and we're going 
to do the usual of uploading it to the 

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class website. 
Go to the class website, scroll down to 

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Programming Assignments. 
Go to Tools. 

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And you can see Espresso at the bottom. 
Click Submit. 

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Choose the file. 
Click Submit. 

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Now, they just say that your submission 
has been accepted and will be graded 

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shortly. 
So, just go back to the previous page. 

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And after a while, you should be able to 
see your feedback. 

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And here's the output for the particular 
run. 

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As you can verify, it's going to match 
the output that we have in the tutorial. 

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Some of you may be wondering whether it 
will be possible to download Espresso on 

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your machines to install, just like what 
you could have done for mini set. 

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The answer is yes, you can go to this 
particular website. 

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It's the SIS 1.3 distrubustion. 
Even though is says SIS here, Espresso is 

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going to bundle this part of the 
distribution. 

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SIS is another tool that we'll be 
introducing next week. 

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And there you have it, a very short 
introduction to using Espresso through 

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our class website. 
As usual, let us know if you have any 

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comments or feedback to the discussion 
forums. 

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Thank you.