Monday, May 08, 2006

The Road to Reality

I have been interesting in Physics as a hobby for a very long time. Back in the mid-90's, I was reading about Quantum Mechanics and Relativity on a fairly regular basis. I had to really dig to find books that were deeper than a purely "popular" treatment, but not so deep that an engineer could actually make sense of them. Some math, not all math.

Having been trained as an engineer is "almost enough" to handle "some" of the math, but I ended up with an awfully long road ahead. I eventually got a bit discouraged, but never quite gave up. (Emulation came along and I got a bit distracted for a number of years.)

In 2004 Roger Penrose wrote a giant book on Math and Physics, call "The Road to Reality: A Complete Guide to the Universe". It is a highly mathematical, modern treatment, but it builds on itself such that, theoretically, someone with some math background can actually understand it all. (At least, they'll be able to self-direct to other resources as needed.) There are 16 chapters of Math (the first 1/3 or so), followed by as many on Physics. For comparison, my formal math training ended at chapter 7. I now find myself in chapter 15, nearly finished with the math section. It is definitely not for everyone, but it's exactly what I needed.

Finally, I have found that discussing the details of the book can help a lot with the understanding. I recently created a Yahoo Group called RTRFANS, for just this purpose. With this book, and with internet resources that weren't available in the mid-90's, I've now got a shot at understanding truly modern physics.

Some porting work

I really need to post more often!

For a while now, I've been wanting to experiment with new methods of high-speed circuit simulation. The idea would be to prototype some discrete-audio stuff, possibly for MAME, using something like Python.

After looking into the requirements, I realized that I needed to handle polynomials with a single variable, and ratios of these polynomials. Also, I needed to be able to handle real or complex variables. I looked around on the web, and I found that SciPy is finally coming along nicely on Windows. However, I wasn't entirely happy with the root finder they use.

Along the way, I also found the ratfun package, which looked perfect, but was unsupported on Windows. I dug in and in a couple weekends, got it building under Windows. I think I'll be using it for the experiments, whenever I get back to it.

Fun with FPGAs - recreating the Atari TIA, Part 1

I have been playing with recreating the Atari TIA chip as used in the original 2600 in an FPGA.  I know this has been done a few times alrea...