Picaxe controllers have been around since 2000 in 8 40 pin packages. They are extremely popular in France and Britain, where they are made. They have a bootloader program that makes them easy to use. The bonus content provided here supplements the article first published in the March-April 2012 issue of Robot magazine. It dealt with the 20M2 board.
Have fun discovering the basics of your 20M2. There are lots of PICAXE product PDFs you can download at http://www.picaxe.com/Datasheet-List to get project ideas.
LINKS TO SELLERS: