More Bioinformatics

Recently I had reason to get interested in process modelling.  Ultimately I ended up writing an Antlr4 grammar for Modelica (here), but in the mean time I came up with SML (Simple Modeling Language).  The Antlr4 grammar is sml.g4. The characteristics I wanted in my own modeling languages were: Ability to define models as text files…

Back in the dark ages (the 1980’s), people like myself coded on Apple][ computers.  If you were good you coded in Applesoft BASIC or Integer BASIC. If you were really geeky you coded in Assembly language on the 6502 processor.  The Apple][ OS was coded in assembly language, so if you really wanted to understand what…

In general, I install QEMU on my Macbook using MacPorts.  However I recently had a need to get the tip of the QEMU development tree. Getting the QEMU source tree is trivial: git clone git://git.qemu-project.org/qemu.git I needed an updated version of dtc: git submodule update –init dtc The build instructions from the README are: mkdir…

I’ve bee hacking away trying to set up Crochet-BSD to build boot images for Wandboard.  Wandboard uses Cortex A9 processor, so it’s ARM.  The linux distros for it use U-Boot, so that seemed like a likely place to start for FreeBSD. Looking at the Wandboard Wiki, there is an article on U-Boot which explains how…

I’ve been reading lots of interesting information about iTunes and IOS, so I thought I would investigate, just what is in an iTunes backup.  Typically, on OS X, you can find your iTunes backup here, under the appropriate OS X user profile: /Library/Application Support/MobileSync/Backup When you look at the backup, it’s a giant list of…

I’ve recently become interested in how the i386 boot loader works.  There is an excellent example of a boot loader here, and another here.  Some simple protected-mode code which implements a kernel capable of writing a line of text, is here.  FemtoOS, is the culmination of combining code from all those, and building a simple…