Alan Feldstein's Blog http://alanfeldstein.com/nucleus/Alan.php en-us Nucleus CMS v3.24 © Weblog http://backend.userland.com/rss http://alanfeldstein.com/nucleus/Alan.php/nucleus/nucleus2.gif Alan Feldstein's Blog http://alanfeldstein.com/nucleus/Alan.php My silence doesn't mean I'm not doing anything http://alanfeldstein.com/nucleus/Alan.php?itemid=66 General http://alanfeldstein.com/nucleus/Alan.php?itemid=66 Mon, 9 Aug 2010 19:46:05 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=66 Like Emerging From a Coma http://alanfeldstein.com/nucleus/Alan.php?itemid=65 P90X, a 90-day program that I started 2010-04-08, has caused an unprecedented disruption of my work for Cosmic Horizon. Other activities share the blame. I concluded my 2-year study of Japanese on 2010-05-13. And it's baseball season. Being the organizer of Austin MLB comes with some responsibilities, but I've recently managed to get the time expenditure to a reasonable level.

As I come back to work, it's a lot like emerging from a coma.

The Software Requirements Specification doesn't say much about the SPARC-V9 Standard Reference Model (see Section 1.7.2).

I think the reference model should run in another thread. The monitor idea previously discussed (i.e. a monitor that watches instructions fetched by the DUV) may not be bad. Given that we are taking a black box approach, we can still gather information about that which is necessary (although perhaps not sufficient). If we are monitoring the DUV's instruction addresses as they are read from memory, then it is necessary for the address to appear on the bus before the instruction at that address to can be executed, although this is insufficient evidence to prove that the instruction has been fetched into the core, let alone executed and committed.

Monitors are self-contained components that observe e.g. inputs to the DUV for scoreboard updates.

What kind of UML diagram would be good here?

communication diagram]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=65 Fri, 9 Jul 2010 17:32:01 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=65 OpenSPARC synthesis with Icarus Verilog http://alanfeldstein.com/nucleus/Alan.php?itemid=64 "And hopefully I will have the good sense to excuse myself [from building and testing Icarus Verilog on 64bit Solaris/SPARC] if this work detracts my attention too much from Cosmic Horizon's OpenSPARC objectives."

Let me take you from my last Icarus Verilog blog item up to the present.]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=64 Fri, 12 Mar 2010 14:55:59 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=64 Does anybody really know what time it is? http://alanfeldstein.com/nucleus/Alan.php?itemid=63 General http://alanfeldstein.com/nucleus/Alan.php?itemid=63 Thu, 11 Feb 2010 14:51:17 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=63 Solaris Installation Hell http://alanfeldstein.com/nucleus/Alan.php?itemid=62 General http://alanfeldstein.com/nucleus/Alan.php?itemid=62 Mon, 11 Jan 2010 11:51:33 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=62 I think monitors belong in the "view" http://alanfeldstein.com/nucleus/Alan.php?itemid=61 my last blog about FSS. And I'm still working on the refactoring, letting the compilation failures tell me what work remains. Obviously, since so much time has elapsed without completing this, my current focus is on the other project, but that will change eventually.

The only thing in my notes for the period was a 2009-09-04 entry reminding me to "Guard against writes to memory before POR."]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=61 Wed, 9 Dec 2009 21:29:42 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=61 Outrageous Sin http://alanfeldstein.com/nucleus/Alan.php?itemid=60
Please never go to The Hub as long as you live. Here's why.]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=60 Mon, 26 Oct 2009 09:32:18 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=60 My Big Mouth and I http://alanfeldstein.com/nucleus/Alan.php?itemid=59 Icarus Verilog, I saw a message thread: [Iverilog-devel] Need Icarus test on a 64 bit machine. ]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=59 Fri, 25 Sep 2009 19:01:12 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=59 Still Sidetracked http://alanfeldstein.com/nucleus/Alan.php?itemid=58 SPARC-V9 Standard Reference Model on 2009-06-23. I'm amazed that I was able to do that much that day. Right after that, I came down with a severe cold that put me right back in bed, so June was nearly a complete loss.

Then on 2009-07-08, I started Japanese 2, an accelerated summer course at Austin Community College. That turned my schedule upside down until 2009-08-13. Why am I studying Japanese? I specialize in SPARC-V9 and have developed significant expertise. Fujitsu Limited is a major player in the world of SPARC-V9. They design their SPARC64 microprocessors in Kawasaki, a suburb of Tokyo.

Adding to the squeeze, when Sun's stock price goes up, I spend more time on OpenSPARC, borrowing from the time allocation for FSS. JAVA is up.

That's enough with the excuses. Let me tell you what progress I have been able to make.]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=58 Mon, 24 Aug 2009 20:28:30 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=58 What a Pain in the Ass! http://alanfeldstein.com/nucleus/Alan.php?itemid=57 Pragmatic Version Control Using Git by Travis Swicegood, from the beginning of the book through Chapter 7 "Working with Remote Repositories". That should have given me all I needed to figure out how to get back in sync with Icarus Verilog, a project to which I had been contributing and intend to continue. The book's Section 7.3 "Keeping Up-to-Date" is most relevant, but that section is quite thin, less than a page long. I had been having a "git pull" failure. Although the book improved my understanding of Git, for this specific failure I was still on my own.]]> General http://alanfeldstein.com/nucleus/Alan.php?itemid=57 Fri, 24 Jul 2009 12:09:34 -0500 http://alanfeldstein.com/nucleus/Alan.php?itemid=57
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