- excellular: Cellular Automata with Excel (github.com)
This spreadsheet contains two cellular automata: the classic elementary automata described by Stephen Wolfram in A New Kind of Science, and a 4-color totalistic automata described by Kenneth E. Perry in the December 1986 issue of BYTE magazine.
- Abstract Mathematical Art (BYTE magazine, December 1986)
COMPUTER-GENERATED mathematical art is art created by pure mathematics as opposed to other forms of computer graphics. In this article, the mathematical entities are “one-dimensional cellular automata.” I have found their study exciting and astounding.
- Mapping the page tables into memory via the page tables (devblogs.microsoft.com)
On the 80386 processor, there is a trick for mapping the page tables into memory: You set a slot in the top-level page directory to point to… the page directory itself. When you follow through this page directory entry, you end up back at the page directory, and the effect is that the process of mapping a linear address to a physical page ends one stop early. You end up pointing not at the destination page, but at the page table that points at the destination page. From the point of view of the address space, it looks like all of the page tables have been mapped into memory. This makes it easier to edit page directory entries because you can do it within the address space.
Stanford Encyclopedia of Philosophy
- Cellular Automata (plato.standford.edu)
Cellular automata (henceforth: CA) are discrete, abstract computational systems that have proved useful both as general models of complexity and as more specific representations of non-linear dynamics in a variety of scientific fields. Firstly, CA are (typically) spatially and temporally discrete: they are composed of a finite or denumerable set of homogeneous, simple units, the atoms or cells. At each time unit, the cells instantiate one of a finite set of states. They evolve in parallel at discrete time steps, following state update functions or dynamical transition rules: the update of a cell state obtains by taking into account the states of cells in its local neighborhood (there are, therefore, no actions at a distance).