John Kortink's website

I have written a number of articles, including some that were published in magazines A & B Computing (1980s) and Elektor Electronics (1990s).

A utility for printing text in an Old English font

An implementation of Conway's 'Game Of Life'

An implementation of the game 'Mastermind'

Defend yourself against waves of descending aliens

A full featured word processor

Enlarge your printer, sound or RS423 buffer

A framework for building sideways ROMs

A sideways ROM containing various useful utilities

Browse through all the ships available in Elite

Master style startup options for earlier machines

A video digitiser for the Acorn Archimedes (black and white)

A video digitiser for the Acorn Archimedes (colour extension)

A video digitiser for PCs (black and white / colour)

I delved deep into this sound chip (used in the Acorn BBC) to improve some sound emulation code. Some might benefit from my 'research'.

Surprisingly, the 2114 RAM chips used in the Acorn Atom do not only come in the regular and 'L' (low power) flavours, but CMOS as well.

A comparison of graphics benchmarks performed under RISC OS 4.39 and 6.20, using the native video system, ViewFinder, and VPod.

A gathering of sources that may be of use to someone, somewhere, sometime, in some way. Or perhaps not at all ...