webtweakers.com

I first got acquainted with computers in the early 1980s when I started playing with the very popular home computer Commodore 64. After a few years of indulging in games, I taught myself BASIC and later 6510 Assembly. After a small carreer in the C64 demo scene, where I was the programmer in a small group of people and made several demos, I bought an Amiga and my first PC later in '91.

In the mid '90s I released a two-part graphics collection, written in Borland Pascal and x86 Assembly, known as gfxfx and gfxfx2 (short for Graphics Effects). Around the same time I made my first website, soon featuring preliminary dhtml.

After having worked for the ABN Amro bank in the software engineering departement on intranet websites for two years, 1999 and 2000, I became a freelance web developer at a small design and internet studio. In the 4 years I worked there, I was responsible for all technical aspects, ranging from server maintenance to back-end and front-end programming of several public websites and applications.

Download my CV or view my

• Hygia (Apr 2007)
  Hygia is a web application testing framework written in PHP 5, but capable of testing any type of software that speaks the HyperText Transfer Protocol (HTTP and HTTPS). Hygia contains a thin HTTP client that can automate client requests to the server. It understands how to handle most HTTP headers and is capable of transmitting and receiving all possible data formats due to its extendibility with custom written plug-ins (for manipulation and recording of input and output data) and data validators. Application end point properties can be configured by using XML.
• EarthPOI (Sep 2006)
  My latest endeavour, which I made with a friend, is still a work in progress but already functional. EarthPOI allows you to share you favorite places and pin point them on a map. More to come...
• webtweakers blog (May 2006)
  It took me a while, but there you have it: a blog! :) Now renewed and running on webtweakers.com.
• XConn (May 2005)
  XConn is a small Javascript library that uses XMLHTTP to make a connection with a server in order to send and/or retreive data, without the need of reloading the page. It's based on the buzz of 'AJaX' and used in the quotes at the bottom of this page.
• C64 SID-tunes (April 2005)
  Pure nostalgia: Commodore 64 music in the form of SID-tunes, playable from within your browser.
• phpdomxml-0.9 (January 2005)
  phpdomxml is an implementation for XML's Document Object Model in PHP 4.x.
• WhoIs Service (June 2004)
  A whois-service, in case you want to find out who owns a domain name.
• Photo Album (March 2004)
  Very simple and straight-forward photo-album with a bunch of pictures that I took. Changes at certain times...
• Tempo Typen game (March 2004)
  Tempo Typen is a small game, based on the C64 version of the mid-80s, which even spawned a TV-show at that time here in the Netherlands. Written in DHTML. Saves high scores.

• whois (2005)
  Tries to find some information about a provided domain name.
• ip (2005)
  The IP number of your system from this end of the line.

Macromedia Flash is a beautiful sollution for creating graphical eye-candy or stable RIA's. I have used Flash for both and below are some things that fall in the first category.

• DYCP Nostalgia (August 2004)
  DYCP: Different-Y-Character-Position. A scrolling text in mid-90s Amiga fasion, written in Flash MX.
• 3D Textures (August 2004)
  Texture mapping on 3D objects in Flash MX. Source available.
• Dodecahedron (July 2004)
  Experiment with 3D in Flash MX. Source available.
• Magnetism (July 2004)
  Flash playdo. A Flash MX component version of a very old effect. Source available.
• Grow-A-Tree (March 2004)
  Experiment with recursive objects in Flash. Based on the fabulous levitated.net. Source available.
• Flash Photo Album (March 2004)
  A bunch of photos of Amsterdam thrown on a heap in a Flash photo album.

When I had my PC in '91 I started programming Pascal right from the start and Assembly soon followed. These packages below are some of the things I made. They were made in Turbo/Borland Pascal, but it may be possible to compile under a different flavor of Pascal.
Note: these programs were mostly written before the age of Windows and might require a DOS-emulator to run properly.

• PD (Summer 1995 - Fall 1998)
  Personal Database: a freeware, public domain (open source), personal addresses database. Written in Pascal and Assembly with a load of functionality, including context-sensative help pages and pull down menu system.
• Signal2 (November 1996)
  Sound Recognition v2.0 is an instrument recognition application that was written for a school project that we aced. It has a nice fast implementation of an FFT and uses my gfxfx code to display sound waves and frequency graphs in real-time. Pascal source code and executables provided in the ZIP-package.
• Analyse (January 1996)
  Analyse is a small program to analyse data files of a physics spring system that I made during my studies as an improvement over the application the polytechnic provided. Source code, executable and data files are included in the ZIP-package.
• gfxfx2 (February 1995)
  Shareware package of graphics related Pascal source code, including 3d programming, image viewer, lots of scrolls and much more.
  (Note: addresses mentioned in the documentation are not valid anymore)
• Tempo Typen (December 1994)
  The Tempo Typen game implemented in Pascal, including source code and executable. Saves highscore.
• gfxfx (April 1994)
  I released a lot of graphics source code on Fidonet, written in Pascal and Assembly. By popular demand I bundled all the code and released it as gfxfx: Graphics Effects. This is that package.
• Caller Maintenance (January 1994 - September 1996)
  In the early '90s I had a BBS and ran Remote Access. For this system I wrote a maintenance shareware application, which could keep track of all people that visisted your BBS: the callers.

Commodore 64 demos were a creative outlet, a funny way to show what you could create (as a team or on your own), a way to spend a rainy sunday, etc. The demos below were all created in 1988 and 1989 by a group called 'Cool Crew', of which I was a founding member. These programs can be run in a C64-emulator.

• Syndic (January 1989)
• Notorious (October 1988)
• Groovy (July 1988)
• Just a Great Contact (1988)
• Outshining Art (1988)
• Fight for Light (February 1988)

• apache/php/mysql installation (October 2004)
  Quick Apache 2.x, PHP 4.x and MySQL 4.x installation & configuration guide for Windows platforms - for those who have trouble with it.
• 'Experts aan het werk' (dutch; May 2003)
  (PDF files, require Acrobat Reader.)
  page 1 & 2
  page 3 & 4
• Bitmaps and Sprites (October 1995)
  Continuation of the August article for the Pascal Magazine.
• Fast VGA Graphics Without BGI (August 1995)
  Introduction to graphics programming, written for and published in the Pascal Magazine.
• Graphics Programming Methods (August 1995)
  Tips & Tricks for basic graphics programming, first published in the registered version of gfxfx2.

• last.fm
  Streaming music, ideal to discover new music.