The 555 Timer Was Just The Beginning For Hans Camenzind

Editor’s Note: Hans Camenzind was selected for the Engineering Hall of Fame in our inaugural induction, which appeared in our 50th Anniversary issue in 2002. He died on August 8, 2012. His son, Peter, has summarized his career for us. Hans Camenzind is well known for the design of the 555 timer, but he accomplished much more in his lifetime. …

Booting an Intel Architecture System, Part I: Early Initialization

By Pete Dice, December 26, 2011 The boot sequence today is far more complex than it was even a decade ago. Here’s a detailed, low-level, step-by-step walkthrough of the boot up. Taking a lot of little steps along a path is a good analogy for understanding boot flow in Intel Architecture-based systems. The minimum firmware requirements for making a system …