David Ljung Madison Stellar

Programming, Algorithm Design/Development, VLSI / CPU Verification

Version Info

Resume v4.7, released 2016-06-01.
Please get current source at: http://DaveSource.com/Resume/

Contact Info

Before contacting me, make sure you have an up-to-date resume.
I am currently looking for either full-time work or contract work.
I am not interested in long-term relocating from Silicon Valley.

Recruiters: Use email, DO NOT CALL
Home: 415.341.5555 (call between 11a-8p PST)


To experience an incredible life and build amazing things.

Work Experience

Verification Consultant ,Bluechip Systems. May 2015 - Jan 2016.
  • Verified secure communications between apps/device and an embedded SoC running a custom Linux on a custom CPU
Director of Verification, iCelero, LLC. Jul 2007 - Dec 2013.
(Previously "3 Plus 1, Corp")
  • Managed verification for a complex, fully-custom processor under a very tight schedule
  • Created complete toolchain and testbenches for entire CPU verification process, from block level to full-chip to SOC.
  • Created highly sophisticated test packer/generator for VLIW CPU
  • Handled custom design of many software verification packages
Independent Consultant, DaveSource Consulting. Jul 2002 - Present.

Contractor for VLSI/Processor Verification and/or software design/implementation.
I'm not terribly interested in full-time employment right now.
Some of the kind of things I've worked on:

CPU Verification Engineer, Transmeta Corp. Jan 2000 - Jul 2002.

I split my time between tool development and block-level verification:

CPU Verification Engineer, SandCraft Inc.. Jul 1998 - Jan 2000.

I was part of a MIPs processor verification team.

In charge of initial verification of the execute half of SR1/Montage CPU:
  • Designed and implemented testbench in Behavioral Verilog/C PLI. Initially it tested portions of the chip that were finished, and eventually was used for full chip verification.
  • Created the major tool flow for verification except for some random code generators and the simulator.
  • Wrote an assembler/template generator and a weightfile generator
  • Wrote testplan, found and debugged failures with logic designers
  • Wrote queueing software, status scripts, plenty of docs
    Preparation for next project (SR1-GX):
  • Used down time to rewrite a large portion of the tool chain and documentation to clean it up and add desired features.
  • CPU Verification and Debug, VLSI Technology Lab, Hewlett-Packard. Aug 1994 - Jun 1998.

    I was working in the Engineering Systems Lab (now SVTD) in Fort Collins, Colorado which designed the PA-RISC line of workstation/server processors.

    PA-8000 (PCXU/Onyx) post-silicon debugging/tools:
  • Boot code and test framework
  • Hardware environmental testing and debug software
  • Finding and debugging failures
    PA-8500 (Cuda) pre-silicon verification:
  • Random code generators, test creation
  • Test checkers and evaluators
  • Tools writer
    PA-8500 post-silicon setup:
  • Created the entire tool chain for post-silicon system debug from scratch (except for some of the random code generators), such as controller scripts, environment scripts, shmoo scripts, failure searching and evaluation, boot code and test framework.
    Other duties:
  • Lab Resource: Unix, programming, scripting..
  • Tool geek (wrote CAD tools, personnel tools, etc..)
  • Shareware Programmer, Marginal Hacks

    I maintain a bunch of tools that I wrote at Marginal Hacks.

    album, the most popular project on there, is highly ranked at freshmeat and is the first link if you search for the word album at google, due to it's popularity.

    Shareware Programmer, WizPort Project June 1993 - Current.

    In college I spent a number of years creating a large software project called the WizPort, a solution to a very complex UNIX problem. The goal of the WizPort was to allow non-root level users set up a virtual UNIX machine that people could connect to on a different port. This 'machine' had it's own filesystem with a file security system that was far more complex and flexible than the UNIX system. Part of this project included creating an entirely new UNIX shell and modifying many UNIX utilities to work with the WizPort.

    Project references available on request

    University Project, DEStiny 1994

    One of my favorite school projects was the DEStiny chip. This was a VLSI implementation of the DES password encryption algorithm that I created with a fellow student to demonstrate weaknesses in current password security.

    Coolest Two Lines of Code Ever, SpeedWaller 1989

    See the description at http://DaveSource.com/Projects/SpeedWaller.
    6 months on two lines of code. Talk about dedication!



    Computer Languages

    I write most of my big programs in C, Ruby, Perl or Java, though I have written large projects in Assembly and Verilog. I have worked in C++, but not for a while. Our test environment at Transmeta was in Scheme.
    At one time I've even used the following languages: Lisp, Basic, Fortran, Ruby, Python, sed, yacc, sh, ksh, zsh, csh, tcsh, and so forth.
    I generally require only two days to learn a new language, and I gain fluency soon thereafter.

    Computing Environments

    I have experience in UNIX system administration/shell scripting and have expertise in UNIX programming.

    Human Languages

    I read and write English fluently. I am a firm believer in writing understandable documentation and I have been known to over-comment my code.

    Breaking things

    I like to use things in new and interesting ways, I believe this makes me a good verification engineer. I have managed to break and find bugs in almost every tool I have used, including some of the big guys:
    gcc, cpp preprocessor (a hang!), HPUX CC, HPUX linker, various assemblers, perl (2 so far), various shells (tcsh, ksh, ..), various verilog simulators (VCS, ESP), rccs versioning software, etc..


    Degree: B.S. ECE/CS (Double major: Electrical Computer Engineering with Computer Option and Computer Science)
    School: 1989-1994: University Of Wisconsin, Madison


    When I'm not programming geeky things, I love to cook, ski and play with the many animals who live with me. I spend most of my free time Swing Dancing.

    Member, DNRC

    Time's Person of the Year, 2006